[Federal Register Volume 77, Number 130 (Friday, July 6, 2012)]
[Notices]
[Pages 40092-40106]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-16552]
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NUCLEAR REGULATORY COMMISSION
[Docket Nos. 50-335 and 50-389; NRC-2011-0302]
License Amendment To Increase the Maximum Reactor Power Level,
Florida Power & Light Company, St. Lucie, Units 1 and 2
AGENCY: Nuclear Regulatory Commission.
ACTION: Environmental assessment and finding of no significant impact.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC or the Commission)
is considering issuance of an amendment for Renewed Facility Operating
License Nos. DPR-67 and NPF-16, issued to Florida Power & Light Company
(FPL or the licensee) for operation of the St. Lucie Plant, Units 1 and
2 (St. Lucie), located in St. Lucie County, Florida. The proposed
license amendment would increase the maximum thermal power level from
2,700 megawatts thermal (MWt) to 3,020 MWt for each unit. The proposed
power increase is 11.85 percent over the current licensed thermal
power. The NRC performed an environmental assessment (EA) and based on
its results, the NRC is issuing a finding of no significant impact
(FONSI).
ADDRESSES: Please refer to Docket ID NRC-2011-0302 when contacting the
NRC about the availability of information regarding this document. You
may access information related to this document, which the NRC
possesses and is publicly available, using any of the following
methods:
Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2011-0302. Address
questions about NRC dockets to Carol Gallagher; telephone: 301-492-
3668; email: [email protected].
NRC's Agencywide Documents Access and Management System
(ADAMS): You may access publicly-available documents online in the NRC
Library at http://www.nrc.gov/reading-rm/adams.html. To begin the
search, select ``ADAMS Public Documents'' and then select ``Begin Web-
based ADAMS Search.'' For problems with ADAMS, please contact the NRC's
Public Document Room (PDR) reference staff at 1-800-397-4209, 301-415-
4737, or by email to [email protected]. The ADAMS accession number
for each document referenced in this notice (if that document is
available in ADAMS) is provided the first time that a document is
referenced.
NRC's PDR: You may examine and purchase copies of public
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555
Rockville Pike, Rockville, Maryland 20852.
I. Introduction
The NRC is considering issuance of an amendment for Renewed
Facility Operating License Nos. DPR-67 and NPF-16, issued to Florida
Power & Light Company (FPL or the licensee) for operation of St. Lucie,
located in St. Lucie County, Florida, in accordance with Title 10 of
the Code of Federal Regulations (10 CFR) 50.90. The NRC performed an EA
and based on its results, the NRC is issuing a FONSI.
The proposed license amendment would increase the maximum thermal
power level from 2,700 megawatts thermal (MWt) to 3,020 MWt for each
unit. The proposed power increase is 11.85 percent over the current
licensed thermal power. In 1981, FPL received approval from the NRC to
increase its power by 5.47 percent to the current power level of 2,700
MWt.
The NRC did not identify any significant environmental impacts
associated with the proposed action based on its evaluation of the
information provided in the licensee's application and other available
information. For further information with respect to the proposed
action, see the licensee's applications dated November 22, 2010, and
February 25, 2011 (ADAMS Accession Nos. ML103560419 and ML110730116,
respectively), as supplemented by letter dated May 2, 2012 (ADAMS
Accession No. ML12124A224).
The NRC published a notice in the Federal Register requesting
public review and comment on a draft EA and FONSI for the proposed
action on January 6, 2012 (77 FR 813), and established February 6,
2012, as the deadline for submitting public comments. By letters dated
January 30, 2012, and January 6, 2012 (ADAMS Accession Nos. ML12037A063
and ML12044A127, respectively), the NRC received comments from FPL and
Mr. Edward W. Johnson, respectively. The FPL comments provided new
estimates on the number of additional workers needed to support the
outage work implementing the proposed Extended Power Uprate (EPU) and
revised the projected outage times necessary to implement the EPU. The
FPL comments have been incorporated in this final EA with no change to
the FONSI conclusion. The comments from Mr. Johnson have been addressed
in this final EA with no change to the FONSI conclusion. The comments
are summarized in the attachment to this document, ``Summary of
Comments on
[[Page 40093]]
the Draft Environmental Assessment and Draft Finding of No Significant
Impact.''
II. Environmental Assessment
Plant Site and Environs
The St. Lucie site is located on approximately 1,130 acres (457
hectares) in Sections 16 and 17, Township 36 South, Range 41 East on
Hutchinson Island in unincorporated St. Lucie County, Florida. St.
Lucie is bordered by the Atlantic Ocean to the east and the Indian
River Lagoon, a tidally influenced estuary, to the west. The plant is
located on Hutchinson Island between Big Mud Creek to the north and
Indian River to the south on an area previously degraded through
flooding, drainage, and channelization for mosquito control projects.
The nearest city limits from the plant site on the Atlantic coast are
Port St. Lucie, approximately 2.5 miles (mi) (4 kilometers (km))
southwest, and Fort Pierce, approximately 4 mi (6.4 km) northwest of
the plant. St. Lucie has two pressurized water reactors (Units 1 and
2), each designed by Combustion Engineering for a net electrical power
output of 839 megawatts electric. St. Lucie Unit 1 is fully owned by
FPL, which has operated it since March 1, 1976. The licensee also
solely operates St. Lucie Unit 2, which began operations on April 6,
1983, and is co-owned by FPL, Orlando Utilities Commission, and Florida
Municipal Power Agency.
St. Lucie withdraws cooling water from the Atlantic Ocean through
three offshore cooling water intakes with velocity caps. The ocean
water is drawn through buried pipes into the plant's L-shaped intake
canal to the eight intake pumps that circulate the non-contact cooling
water through the plant. Two mesh barrier nets, one net of 5-inch (in)
(12.7 centimeter (cm)) mesh size and the other of 8-in (20.3 cm) mesh
size, and one rigid barrier located sequentially in the intake canal
reduce the potential loss of large marine organisms, mostly sea
turtles. Water passes through a trash rack made of 3-in (7.6 cm) spaced
vertical bars and a \3/8\-in (1 cm) mesh size traveling screen, against
which marine organisms that have passed through the nets are impinged,
and into eight separate intake wells (four per unit) where it is pumped
to a circulating-water system and an auxiliary cooling water system at
each unit. The majority of the water goes to a once-through
circulating-water system to cool the main plant condensers. The system
has a nominal total capacity of 968,000 gallons per minute (gpm)
(61,070 liters per second (L/s)). The auxiliary cooling water systems
are also once-through cooling systems but use much less water (up to
58,000 gpm (3,660 L/s)) than the circulating-water systems. Marine life
that passes through the screens becomes entrained in the water that
passes through the plant and is subject to thermal and mechanical
stresses. The plant is also equipped with an emergency cooling water
intake canal on the west side that can withdraw Indian River Lagoon
water through Big Mud Creek, but this pathway is closed during normal
plant operation.
The heated water from the cooling water systems flows to a
discharge canal and then through two offshore discharge pipes beneath
the beach and dune system back to the Atlantic Ocean. One 12-foot (ft)
(3.6 meter (m))-diameter discharge pipe extends approximately 1,500 ft
(457 m) offshore and terminates in a two-port ``Y'' diffuser. A second
16-ft (4.9 m)-diameter discharge pipe extends about 3,400 ft (1,040 m)
from the shoreline and terminates with a multiport diffuser. This
second pipe has fifty-eight 16-in (41 cm)-diameter ports spaced 24 ft
(7.3 m) apart along the last 1,400 ft (430 m) of pipe farthest
offshore. The discharge of heated water through the diffusers on the
discharge pipes ensures distribution over a wide area and rapid and
efficient mixing with ocean water.
Background Information on the Proposed Action
By application dated November 22, 2010 (Unit 1), and February 25,
2011 (Unit 2), the FPL requested an amendment for an EPU for St. Lucie
to increase the licensed thermal power level from 2,700 MWt to 3,020
MWt for each unit, which represents an increase of 11.85 percent above
the current licensed thermal power. This change requires NRC approval
prior to the licensee operating at that higher power level. The
proposed action is considered an EPU by the NRC because it exceeds the
typical 7-percent power increase that can be accommodated with only
minor plant changes. An EPU typically involves extensive modifications
to the nuclear steam supply system contained within the plant
buildings.
The licensee plans to make the extensive physical modifications to
the plant's secondary side (i.e., non-nuclear) steam supply system that
are needed in order to implement the proposed EPU. The modifications
were scheduled to be implemented for Unit 1 and Unit 2 over the course
of four refueling outages. Three of the four outages have been
completed, with Unit 2 modifications scheduled to be implemented during
the fall 2012 outage, which will be longer than a routine 35-day outage
at approximately 113 days. Unit 1 also requires a short ``mid-cycle''
outage of 10-days in the summer of 2012 to implement final EPU
modifications. The actual power uprate, if approved by the NRC,
constitutes a 10 percent power uprate from major equipment
installations and upgrades and operating changes and an additional 1.7
percent power uprate from upgrades that decrease certain measurement
uncertainties. As part of the proposed EPU project, FPL would release
heated water with a proposed temperature increase of 3 [deg]F (1.7
[deg]C) above the current discharge temperature through the discharge
structures into the Atlantic Ocean.
Approximately 800 people are currently employed at St. Lucie on a
full-time basis. For the recently completed Unit 1 outage, this
workforce was augmented by an additional 750 EPU workers on average,
with a peak of 1,703 workers. For the mid-cycle Unit 1 outage, FPL
estimates no additional staff. For the upcoming Unit 2 outage, FPL
estimates an average of 1,058 workers, with a peak of 1,439 workers.
The increase of workers would be larger than the number of workers
required for a routine outage; however, the peak construction workforce
would be smaller than the FPL-reported peak workforce for previous
outages involving replacement of major components.
The Need for the Proposed Action
The licensee states in its environmental report that the proposed
action is intended to provide an additional supply of electric
generation in the State of Florida without the need to site and
construct new facilities, or to impose new sources of air or water
discharges to the environment. The licensee has determined that
increasing the electrical output of St. Lucie Units 1 and 2 is the most
cost effective option to meet the demand for electrical energy while
enhancing fuel diversity and minimizing environmental impacts,
including the avoidance of greenhouse gas emissions.
As stated in FPL's application, the proposed action is to provide
the licensee with the flexibility to increase the potential electrical
output of St. Lucie. The proposed EPU will increase the output for each
unit by about 320 MWt, from about 2,700 MWt to about 3,020 MWt.
[[Page 40094]]
Environmental Impacts of the Proposed Action
As part of the original licensing process for St. Lucie, the U.S.
Atomic Energy Commission published a Final Environmental Statement
(FES) in 1973 for Unit 1, and the NRC published a FES in 1982 for Unit
2 (NUREG-0842). The two FESs contain an evaluation of the potential
environmental impacts associated with the operation of St. Lucie over
their licensed lifetimes. In May 2003, the NRC published an
environmental impact statement (EIS) for St. Lucie (ADAMS Accession No.
ML031360705). The 2003 EIS evaluated the environmental impacts of
operating St. Lucie for an additional 20 years beyond its then-current
operating license, extending the operation life of Unit 1 until 2036
and Unit 2 until 2043. The NRC determined that the overall
environmental impacts of license renewal were small. This NRC
evaluation is presented in NUREG-1437, ``Generic Environmental Impact
Statement for License Renewal of Nuclear Plants, Supplement 11,
Regarding St. Lucie Units 1 and 2'' (Supplemental Environmental Impact
Statement (SEIS)--11). The NRC used information from FPL's license
amendment request for the EPU, FPL's response to requests for
additional information (ADAMS Accession No. ML12132A067), consultation
with National Marine Fisheries Service, the FESs, and SEIS-11 to
perform the EA for the proposed EPU.
The licensee's application states that it would implement the
proposed EPU without extensive changes to buildings or to other plant
areas outside of buildings. The licensee proposes to perform all
necessary physical plant modifications in existing buildings at St.
Lucie or along the existing electrical transmission line right of way
(ROW). With the exception of the high-pressure turbine rotor
replacement, the required plant modifications would be generally small
in scope. Other plant modifications would include installing a new
digital turbine control system and associated control room; providing
additional cooling for some plant systems; modifying feedwater and
condensate systems; accommodating greater steam and condensate flow
rates; adjusting the current onsite power system to compensate for
increases in electrical loading; and upgrading instrumentation to
include minor items such as replacing parts, changing setpoints, and
modifying software.
The licensee would use a vehicle and helicopter for transmission
line modifications proposed along the existing overhead electrical
transmission line ROW. The vehicle would transport personnel and a
spool of overhead wire as a helicopter holds and moves the wire into
place for the stringing activities. Although the modifications are part
of the proposed EPU, this type and extent of activity along the ROW is
included in existing maintenance permits and licenses.
The following sections describe the potential nonradiological and
radiological impacts to the environment that could result from the
proposed EPU.
Nonradiological Impacts
Land Use and Aesthetic Impacts
Potential land use and aesthetic impacts from the proposed EPU
include impacts from proposed plant modifications at St. Lucie. While
FPL proposes some plant modifications, most plant changes related to
the proposed EPU would occur within existing structures, with the
exception of modifications along the electrical transmission line ROW.
As described in the licensee's application, the proposed electrical
transmission line modifications would include the addition of
subconductor spacers, an overhead wire, and replacement of relay
protection electronics. The overhead wire would function as a ground
for relay protection of the transmission lines. The licensee would
install these transmission line modifications via helicopter. The only
land use activity FPL expects to occur on the ground along the ROW
would be the periodic need to park a truck or trailer containing a
spool of wire that would be strung but would not extend outside of the
existing ROW area. The NRC expects the electrical transmission line
modifications to cause little or no observable change in the appearance
of the transmission lines. Maintenance of the electrical transmission
line ROW (tree trimming, mowing, and herbicide application) would
continue after EPU implementation. The NRC does not expect land use or
aesthetic changes for the proposed EPU along the transmission line ROW.
During the EPU related refueling outages, FPL added two additional
overflow parking areas (Area 1 and Area 2), safe walk pathways,
additional lighting, and signage. The parking lot located in Area 1 was
a previously vacant area that was prepared by grading. The parking lot
located in Area 2 required some minor grubbing and grading. Both
parking lots are located on previously disturbed areas, and FPL
performed surveys of the areas prior to any ground-disturbing
activities to evaluate potential impacts to threatened or endangered
species and any ecological and cultural resources. Permits were not
required or obtained for this work and best management practices were
employed to reduce fugitive emissions. Other than the ground-disturbing
activities described above, no new construction would occur outside of
existing plant areas, and no expansion of buildings, roads, parking
lots, equipment lay-down areas, or storage areas are required to
support the proposed EPU. Existing parking lots, road access, equipment
lay-down areas, offices, workshops, warehouses, and restrooms would be
used during plant modifications. Because land use conditions would not
change, and because any land disturbance has and would occur within
previously disturbed areas, there would be no significant impact from
EPU-related plant modifications on land use and aesthetic resources in
the vicinity of St. Lucie.
Air Quality Impacts
Because of its coastal location, meteorological conditions
conducive to high air pollution are infrequent at St. Lucie. The plant
is located within the South Florida Intrastate Air Quality Control
Region. In addition, the Central Florida Intrastate Air Quality Control
Region and the Southwest Florida Intrastate Air Quality Control Region
are within 50 mi (80.5 km) of St. Lucie. These regions are designated
as being in attainment or unclassifiable for all criteria pollutants in
the U.S. Environmental Protection Agency's (EPA) regulations at 40 CFR
81.310.
Diesel generators, boilers, and other activities and facilities
associated with St. Lucie emit pollutants. The Florida Department of
Environmental Protection (FDEP) regulates emissions from these sources
under Air Permit 1110071-006-AF. The FDEP reported no violations at St.
Lucie in the last 5 years. The NRC expects no changes to the emissions
from these sources as a result of the EPU.
During EPU implementation, some minor and short duration air
quality impacts would occur from other non-regulated sources. Vehicles
of the additional outage workers needed for EPU implementation would
generate the majority of air emissions during the proposed EPU-related
modifications. Based on a traffic study FPL conducted for the EPU
project, an additional 917 construction vehicles are estimated during
an EPU-related outage period, with a peak increase of 1,333. The
licensee has completed three of four
[[Page 40095]]
planned outages, with the fourth outage planned for the fall of 2012.
The outage duration is expected to be longer than a routine 35-day
outage, at 113 days. Based on the traffic study conducted by FPL, air
emissions from the EPU workforce, truck deliveries, and construction/
modification activities would not exceed the FDEP annual emissions
limit of 5 tons per year, recognized in Rule 62-210.300(3)(b) of the
Florida Administrative Code, and would therefore not be significant. In
addition, FPL would perform the majority of the EPU work inside
existing buildings, which would not result in changes to outside air
quality. The NRC expects no significant impacts to regional air quality
from the proposed EPU beyond those air impacts evaluated for SEIS-11,
including potential minor and temporary impacts from worker activity.
Water Use Impacts
Groundwater
The licensee has approval from the City of Fort Pierce and the Fort
Pierce Utilities Authority to use freshwater for potable and sanitary
purposes. Although this freshwater comes from groundwater sources
pumped from the mainland, St. Lucie does not use groundwater in any of
its cooling systems and has no plans for groundwater use as part of
plant operations in the future. The plant currently uses approximately
309,565 gallons (gal) (1,171,831 liters (L)) of freshwater per day (or
approximately 154,800 gal (585,982 L) per unit per day) and uses
seawater from the Atlantic Ocean for noncontact cooling water. No
production wells are present on the plant site for either domestic-type
water uses or industrial use. The licensee does not discharge to
groundwater at the plant site or on the mainland, and the plant's
individual wastewater facility permit (IWFP) does not apply to
groundwater.
Under the EPU, FPL does not expect to significantly change the
amount of freshwater use or supply source. With an expected increase of
1,000 to 1,700 workers supporting EPU construction activities, the NRC
expects potable water use to increase during the outage and return back
to the regular operating levels after EPU implementation. It is
unlikely this potential temporary increase in groundwater use during
the EPU construction activities would have any effect on other local
and regional groundwater users. The licensee has no use restrictions on
the amount of water supplied by the City of Fort Pierce and the Fort
Pierce Utilities Authority. The NRC expects no significant impact on
groundwater resources during proposed EPU construction activities or
following EPU implementation.
Surface Water
The NRC evaluated the potential effects of releasing heated water
with a proposed temperature increase of 3[emsp14][deg]F (1.7 [deg]C)
above the current discharge temperature through the discharge pipes
into the Atlantic Ocean as part of the proposed EPU. The FDEP regulates
the Florida Surface Water Quality Standards through an IWFP, which also
establishes the maximum area subject to temperature increase (mixing
zone), maximum discharge temperatures, and chemical monitoring
requirements.
The plant injects chlorine in the form of sodium hypochlorate into
seawater upstream of the intake cooling water system in regulated
quantities to control microorganisms. Because FDEP regulates discharges
and requires chemical monitoring, the NRC expects that the authorized
discharges will not exceed the IWFP limitations after EPU
implementation.
The FDEP has issued the plant a permit modification to the IWFP for
a 2[emsp14][deg]F (1.1 [deg]C) temperature increase of the heated water
discharge temperature limit--from 113[emsp14][deg]F (45 [deg]C) before
the EPU to the proposed thermal discharge limit of 115[emsp14][deg]F
(46.1 [deg]C)--to accommodate the 3[emsp14][deg]F (1.7 [deg]C) actual
discharge temperature increase. The FDEP granted this permit
modification with the condition that FPL performs biological and
thermal monitoring studies to demonstrate continued compliance with the
Florida Surface Water Quality Standards, Thermal Surface Water
Criteria. The proposed EPU will not result in an increase in the amount
or rate of water withdrawn from or discharged to the Atlantic Ocean.
The licensee conducted a thermal discharge study for the proposed EPU-
related increase in discharge water temperature (ADAMS Accession No.
ML100830443) that predicts an increase in the extent of the thermal
plume (mixing zone). The ambient water affected by the absolute
temperature increase beyond the existing mixing zone would be less than
25 ft (7.6 m) vertically or horizontally for the two-port ``Y''
diffuser and less than 6 ft (1.8 m) in any direction for the multiport
diffuser.
The FDEP has the authority to review all Federal licenses for
coastal zone consistency with the FCMP. In 2007, FPL included a request
for FDEP to review St. Lucie's coastal zone consistency as part of
their Site Certification Application for the EPU (ADAMS Accession No.
ML12144A316). The FDEP subsequently issued St. Lucie's Site
Certification, demonstrating the proposed EPU's consistency with
Section 307 of the Coastal Zone Management Act (ADAMS Accession No.
ML12144A316).
Because the NRC expects chemical and thermal discharges to remain
within the limits specified in St. Lucie's modified permits, and
because the FDCA determined that the proposed EPU is consistent with
Section 307 of the Coastal Zone Management Act, there would be no
significant impact to surface water resources following implementation
of the proposed EPU.
Aquatic Resource Impacts
The potential impacts to aquatic resources from the proposed action
could include impingement of aquatic life on barrier nets, trash racks,
and traveling screens; entrainment of aquatic life through the cooling
water intake structures and into the cooling water systems; and effects
from the discharge of chemicals and heated water.
Because the proposed EPU will not result in an increase in the
amount or velocity of water being withdrawn from or discharged to the
Atlantic Ocean, the NRC expects no increase in aquatic impacts from
impingement and entrainment beyond the current impact levels.
Currently, all organisms impinged on the trash racks and traveling
screens would be killed, as would most, if not all, entrained
organisms. The licensee would continue to rescue and release sea
turtles and other endangered species trapped by the barrier nets in the
intake canal. In addition, FPL's IWFP permit requires FPL to monitor
aquatic organism entrapment in the intake canal, and, if unusually
large numbers of organisms are entrapped, to submit to the FDEP a plan
to mitigate such entrapment.
The predicted 3 [deg]F (1.7 [deg]C) temperature increase from the
diffusers and resulting increased size of the mixing zone would
increase thermal exposure to aquatic biota at St. Lucie in the vicinity
of the discharge locations. The thermal discharge study conducted for
the proposed EPU predicts no increase in temperature higher than 96
[deg]F (35.5 [deg]C) within 6 ft (1.8 m) of the bottom of the ocean
floor and within 24 ft (7.3 m) from the ocean surface as a result of
heated water discharged from the multiport diffuser. The same study
also predicts that heated water discharged from the ``Y'' diffuser
would not increase the ocean water temperature higher than 96 [deg] F
(35.5 [deg]C) within 2 ft (0.6 m) of the bottom of the ocean floor and
within 25 ft (17 m) from the ocean surface. Based on this analysis,
surface water temperature
[[Page 40096]]
would remain below 94 [deg]F (34.4 [deg]C). Thermal studies conducted
for St. Lucie prior to its operation and summarized in SEIS-11
predicted there would be minimal impacts to aquatic biota from diffuser
discharges that result in a surface temperature less than 97 [deg]F
(36.1 [deg]C). Because the NRC expects the surface water temperature
not to exceed 94 [deg]F (34.4 [deg]C) as a result of the proposed EPU,
the NRC concludes that there are no significant impacts to aquatic
biota from the proposed EPU.
Although the proposed increase in temperature after EPU
implementation would continue to exceed the Thermal Surface Water
Quality Criteria for open waters as contained in the Florida Surface
Water Quality Standards established by FDEP, St. Lucie currently
operates under a separate mixing zone variance authorized by the FDEP.
The NRC expects FPL to continue to meet its limits under the mixing
zone variance after EPU implementation. The licensee will also continue
to assess any potential impacts by performing the biological and
thermal studies required by the IWFP modification mentioned above. If
the study results are insufficient to adequately evaluate environmental
changes, or if the data indicates a significant degradation to aquatic
resources by exceeding Florida Surface Water Quality Standards or is
inconsistent with the FCMP, FDEP could enforce additional abatement or
mitigation measures to reduce the environmental impacts to acceptable
levels. If the NRC approves the proposed EPU, the NRC does not expect
aquatic resource impacts significantly greater than current operations
because State agencies will continue to assess study results and the
effectiveness of current FPL environmental controls. The FDEP could
impose additional limits and controls on FPL if the impacts are larger
than expected. Therefore, the NRC has determined that if FDCA and FDEP
review the study results and allow FPL to operate at the proposed EPU
power level, the increase in thermal discharge will not result in
significant impacts on aquatic resources beyond the current impacts
that occur during plant operations.
Essential Fish Habitat Consultation
The Magnuson-Stevens Fishery Conservation and Management Act (MSA)
identifies the importance of habitat protection to healthy fisheries.
Essential Fish Habitat (EFH) is defined as those waters and substrata
necessary for spawning, breeding, feeding, or growth to maturity
(Magnuson-Stevens Act, 16 U.S.C. 1801 et seq.). Designating EFH is an
essential component in the development of Fishery Management Plans to
minimize habitat loss or degradation of fishery stocks and to take
actions to mitigate such damage. Section 305(b) of the MSA provides
that Federal agencies shall consult with the Secretary of Commerce on
all actions or proposed actions authorized, funded, or undertaken by
the agency that may adversely affect any EFH. On March 20, 2012, an EFH
assessment for the proposed EPU was sent to the National Marine
Fisheries Service (NMFS) under separate cover to initiate an EFH
consultation (ADAMS Accession No. ML12053A345). The submitted EFH
assessment found no adverse effects to EFH for two of the species of
concern (Polyprion americanus and Litopenaeus setiferus) and minimal
adverse effects for the remaining 40 species. The NMFS responded to the
NRC's EFH assessment on May 18, 2012 (ADAMS Accession No. ML12144A008).
In its letter, NMFS concluded that the proposed EPU would not have a
substantial adverse impact on EFH. This letter fulfilled the NRC's EFH
consultation requirements for the proposed EPU under the MSA. Based on
its assessment and NMFS's conclusions, the NRC concludes that the
proposed EPU would not have substantial adverse impact on EFH.
The following table identifies the species that the NRC considered
in its EFH assessment. The NMFS noted in its response that four
additional species--Spanish mackerel (Scomberomorus maculatus), cobia
(Rachycentron canadum), king mackerel (Scomberomorus cavalla), and
spiny lobster (Panulirus argus)--should have been included in the NRC's
EFH assessment. However, NMFS also noted that this omission does not
change the overall evaluation.
Species of Fish Analyzed in the EFH Assessment
----------------------------------------------------------------------------------------------------------------
Fishery management plan Scientific name Common name
----------------------------------------------------------------------------------------------------------------
Coral
----------------------------------------------------------------------------------------------------------------
Order Alcyonacea....... octocorals.
Order Scleractinia..... stony coral.
----------------------------------------------------------------------------------------------------------------
Highly Migratory Coastal Pelagics
----------------------------------------------------------------------------------------------------------------
Tuna................................ Katsuwonus pelamis..... Atlantic skipjack tuna.
Swordfish........................... Xiphias gladius........ swordfish.
Billfish............................ Tetrapturus pfluegeri.. longbill spearfish.
Istiophorus platypterus sailfish.
Large Coastal Sharks................ Carcharhinus limbatus.. blacktip shark.
Carcharhinus leucas.... bull shark.
Carcharhinus perezi.... Caribbean reef shark.
Carcharhinus obscures.. dusky shark.
Sphyrna mokarran....... great hammerhead shark.
Negaprion brevirostris. lemon shark.
Ginglymostoma cirratum. nurse shark.
Carcharhinus plumbeus.. sandbar shark.
Sphyrna lewini......... scalloped hammerhead shark.
Carcharhinus silky shark.
falciformis.
Carcharhinus brevipinna spinner shark.
Galeocerdo cuvier...... tiger shark.
Carchardon carcharias.. white shark.
Small Coastal Sharks................ Rhizoprionodon Atlantic sharpnose shark.
terraenovae.
Carcharhinus acronotus. blacknose shark.
Sphyrna tiburo......... bonnethead shark.
[[Page 40097]]
Carcharhinus isodon.... finetooth shark.
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Shrimp
----------------------------------------------------------------------------------------------------------------
Farfantepenaeus aztecus brown shrimp.
Farfantepenaeus pink shrimp.
duorarum.
Sicyonia brevirostris.. rock shrimp.
Litopenaeus setiferus.. white shrimp.
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Snapper-Grouper
----------------------------------------------------------------------------------------------------------------
Lutjanus buccanella.... blackfin snapper.
Caulolatilus microps... blueline tilefish.
Epinephelus itajara.... goliath grouper.
Lutjanus griseus....... gray (mangrove) snapper.
Seriola dumerili....... greater amberjack.
Lutjanus analis........ mutton snapper.
Pagrus pagrus.......... red porgy.
Lutjanus campechanus... red snapper.
Mycteroperca phenax.... scamp.
Lutjanus vivanus....... silk snapper.
Epinephelus niveatus... snowy grouper.
Epinephelus speckled hind.
drummondhayi.
Rhomboplites aurorubens vermilion snapper.
Epinephelus nigritus... Warsaw grouper.
Haemulon plumier....... white grunt.
Polyprion americanus... wreckfish.
Epinephelus yellowedge grouper.
flavolimbatus.
----------------------------------------------------------------------------------------------------------------
Terrestrial Resources Impacts
St. Lucie is situated on a relatively flat, sheltered area of
Hutchinson Island with red mangrove swamps on the western side of the
island that gradually slope downward to a mangrove fringe bordering the
intertidal shoreline of the Indian River Lagoon. East of the facility,
land rises from the ocean shore to form dunes and ridges approximately
15 ft (4.5 m) above mean low water. Tropical hammock areas are present
north of the discharge canal, and additional red mangrove swamps are
present north of Big Mud Creek. Habitat in the electrical transmission
line ROW is a mixture of human-altered areas, sand pine scrub, prairie/
pine flatwoods, wet prairie, and isolated marshes.
Impacts that could potentially affect terrestrial resources include
disturbance or loss of habitat, construction and EPU-related noise and
lighting, and sediment transport or erosion. The licensee plans to
conduct electrical transmission line modifications that would require a
periodic need to park a truck or trailer containing a spool of wire.
The NRC found in SEIS-11 that no bird mortalities were reported up to
that time associated with the electrical transmission lines and
predicted that FPL maintenance practices along the ROW would likely
have little or no detrimental impact on the species potentially present
in or near the electrical transmission ROW. Because FPL proposes a
similar type and extent of land disturbance during typical maintenance
of the electrical transmission line ROW for the EPU modifications, the
NRC expects the proposed transmission line modifications would not
result in any significant changes to land use or increase habitat loss
or disturbance, sediment transport, or erosion beyond typical
maintenance impacts. Noise and lighting would not adversely affect
terrestrial species beyond effects experienced during previous outages
because EPU-related construction modification activities would take
place during outage periods, which are typically periods of heightened
activity. Also, as previously discussed, prior to the grading or
grubbing conducted for the two additional EPU-related parking areas,
FPL performed a survey of the areas in accordance with FPL's conditions
of site certification under the FDEP and followed best management
practices to ensure that any ecological and terrestrial resources were
protected. For all of these reasons, the NRC expects no significant
impacts on terrestrial resources associated with the proposed action.
Threatened and Endangered Species
Under Section 7 of the Endangered Species Act of 1973, as amended
(ESA), Federal agencies, in consultation with the U.S. Fish and
Wildlife Service (FWS) or the National Marine Fisheries Service (NMFS)
(as appropriate), must ensure that actions the agency authorizes,
funds, or carries out are not likely to jeopardize the continued
existence of any listed species or result in the destruction or adverse
modification of critical habitat.
List of Species
A number of species in St. Lucie County are listed as threatened or
endangered under the ESA, and other species are designated as meriting
special protection or consideration. These include birds, fish, aquatic
and terrestrial mammals, flowering plants, insects, and reptiles that
could occur on or near St. Lucie Units 1 and 2 facility areas and
possibly along the electrical transmission line ROW. The most common
occurrences of threatened or endangered species near St. Lucie are five
species of sea turtles that nest on Hutchinson Island beaches:
Loggerhead turtles (Caretta caretta), Atlantic green turtles (Chelonia
mydas), Kemp's Ridley turtles (Lepidochelys kempii), Leatherback
turtles (Dermochelys coriacea), and Hawksbill turtles (Eretmochelys
imbricata).
The following table identifies the species that the NRC considered
in this EA that it had not previously assessed in SEIS-11 for license
renewal because the species were not listed at that time.
[[Page 40098]]
Table of Federally Listed Species Occurring in St. Lucie County Not
Previously Assessed in SEIS-11
------------------------------------------------------------------------
Scientific name Common name ESA status \a\
------------------------------------------------------------------------
Birds
------------------------------------------------------------------------
Calidris canutus ssp. Rufa.... red knot......... Candidate.
Charadrius melodus............ piping plover.... T.
Dendroica kirtlandii.......... Kirtland's E.
warbler.
Grus americana................ whooping Crane EXPN, XN.
\b\.
------------------------------------------------------------------------
Fish
------------------------------------------------------------------------
Pristis pectinata............. smalltooth E.
sawfish.
------------------------------------------------------------------------
Mammals
------------------------------------------------------------------------
Puma concolor................. puma............. T/SA.
------------------------------------------------------------------------
Reptiles
------------------------------------------------------------------------
Crocodylus acutus............. American T.
crocodile.
Gopherus polyphemus........... gopher tortoise Candidate.
\c\.
------------------------------------------------------------------------
\a\ E = endangered; T = threatened; T/SA = threatened due to similarity
of appearance; EXPN, XN = experimental, nonessential.
\b\ Experimental, nonessential populations of endangered species (e.g.,
red wolf) are treated as threatened species on public land, for
consultation purposes, and as species proposed for listing on private
land.
\c\ The gopher tortoise is not listed by the FWS as occurring in St.
Lucie County. The core of the species' current distribution in the
eastern portion of its range occurs in central and north Florida (76
FR 45130), and FPL has reported the species' occurrence on the site
and in the electrical transmission line ROWs.
Source: U.S. Fish and Wildlife Service.
Impacts on Aquatic Species
The licensee has a mitigation and monitoring program in place for
the capture-release and protection of sea turtles that enter the intake
canal. The NRC has consulted with NMFS since 1982 regarding sea turtle
kills, captures, or incidental takes. A 2001 NMFS biological opinion
analyzed the effects of the circulating cooling water system on certain
sea turtles at St. Lucie. The 2001 NMFS biological opinion provides for
limited incidental takes of threatened or endangered sea turtles.
Correspondence between FPL, FWS, and NMFS in connection with the 2003
license renewal environmental review indicated that effects to
endangered, threatened, or candidate species, including a variety of
sea turtles and manatees, would not significantly change as a result of
issuing a license renewal for St. Lucie. The NRC reinitiated formal
consultation with NMFS in 2005 after the incidental take of a
smalltooth sawfish (Pristis pectinata). The NRC added sea turtles to
the reinitiation of formal consultation with NMFS in 2006 after St.
Lucie exceeded the annual incidental take limit for sea turtles. The
NRC provided NMFS with a biological assessment in 2007 (ADAMS Accession
No. ML071700161) as an update regarding effects on certain sea turtle
species up to that time.
By letter dated April 22, 2011, as part of this ongoing
consultation, the NRC provided NMFS with information regarding
potential impacts to listed aquatic species that would occur as a
result of the proposed EPU. The NRC stated that the proposed EPU would
increase the temperature of discharged water and the temperature of
ocean water within the thermal plume surrounding the discharge point.
However, the increase in the temperature would be relatively small, and
the multiport diffusers on the discharge pipes would continue to
rapidly dilute heated water and limit high temperatures to the mixing
zone area specified in the IWFP. The NRC also analyzed the impacts of
the higher temperatures on the smalltooth sawfish and various sea
turtle species. The NRC concluded that because the smalltooth sawfish
has a high thermal tolerance and sea turtles are able to tolerate a
wide range of water temperatures, these species are unlikely to be
adversely affected by higher water temperatures within the thermal
plume at the St. Lucie discharge under EPU conditions. The NRC expects
a response from NMFS in response to this ongoing consultation.
Should NMFS determine mitigation measures necessary as part of the
ongoing consultation, the NRC could enforce those measures.
Furthermore, as described in the ``Aquatic Resource Impacts'' section,
if the data collected from FPL's thermal monitoring studies indicates a
significant degradation to aquatic resources by exceeding Florida
Surface Water Quality Standards or is inconsistent with the FCMP, FDEP
could enforce additional abatement or mitigation measures to reduce the
environmental impacts to acceptable levels.
Therefore, the NRC expects the proposed EPU would not have any
significant impact on threatened and endangered aquatic species.
Impacts on Terrestrial Species
Planned construction-related activities associated with the
proposed EPU primarily involve changes to existing structures, systems,
and components internal to existing buildings and would not involve
earth disturbance, with the exception of planned electrical
transmission line modifications. As described in the ``Terrestrial
Resource Impacts'' section, electrical transmission line modifications
may require truck use within the transmission line ROW. The NRC
concluded in SEIS-11 that transmission line maintenance practices would
not lower terrestrial habitat quality or cause significant changes in
wildlife populations. Because the proposed EPU operations would not
result in any significant changes to the expected transmission
maintenance activities evaluated for license renewal, the proposed EPU
transmission modifications also should have no adverse effect on
threatened and endangered terrestrial species. In addition, the
transmission modifications should have no adverse effect on the
additional species not previously assessed in SEIS-11 listed in the
above table.
[[Page 40099]]
Traffic and worker activity in the developed parts of the plant
site during the combined refueling outages and EPU modifications would
be somewhat greater than a normal refueling outage. The NRC concluded
in SEIS-11 that the continued operation of St. Lucie was not likely to
adversely affect terrestrial wildlife. This conclusion was supported by
consultation with FWS. Despite potential minor and temporary impacts
from EPU-related worker activity, the effects from the proposed EPU
should not exceed those potential effects evaluated in SEIS-11 and
there should be no adverse effect on threatened or endangered species.
In addition, the increased traffic and worker activity should have no
adverse effect on the additional species not previously assessed in
SEIS-11 listed in the above table.
Impacts on Critical Habitat
The West Indian manatee (Trichechus manatus) also has been
documented at St. Lucie. Designated critical habitat for the West
Indian manatee is located along the Indian River west of Hutchinson
Island. No other critical habitat areas for endangered, threatened, or
candidate species are located at the St. Lucie site or along the
transmission line ROW. The NRC assessed potential impacts on the West
Indian manatee from St. Lucie in SEIS-11, and the effects on its
critical habitat from the proposed EPU should not exceed those assessed
in SEIS-11. The incremental area affected by the increased thermal
discharge due to the EPU should have negligible effects on the
manatee's habitat. Therefore, the proposed EPU should have no adverse
effect on the critical habitat for the West Indian manatee.
Historic and Archaeological Resources Impacts
Records at the Florida Master File in the Florida Division of
Historical Resources identify five known archaeological sites located
on or immediately adjacent to the property boundaries for St. Lucie,
although no archaeological and historic architectural finds have been
recorded on the site. None of these sites is listed on the National
Register for Historic Places (NRHP). Sixteen properties are listed on
the NRHP in St. Lucie County including one historic district. The
Captain Hammond House in White City, approximately 6 mi (10 km) from
St. Lucie, is the nearest property listed on the NRHP.
A moderate to high likelihood for the presence of significant
prehistoric archaeological remains occurs along Blind Creek and the
northern end of the St. Lucie boundary. As previously discussed, all
EPU-related modifications would take place within existing buildings
and facilities and the electrical transmission line ROW, which are not
located near Blind Creek or the northern FPL property boundary. As
discussed in the Land Use Impacts section, prior to any grading or
grubbing conducted on previously disturbed areas for the two additional
EPU-related parking areas, FPL performed a survey of the areas in
accordance with the Site Conditions of Certification and followed best
management practices to ensure that any cultural resources were
protected. Because no change in ground disturbance or construction-
related activities would occur outside of previously disturbed areas
and existing electrical transmission line ROW, the NRC expects no
significant impact from the proposed EPU-related modifications on
historic and archaeological resources.
Socioeconomic Impacts
Potential socioeconomic impacts from the proposed EPU include
increased demand for short-term housing, public services, and increased
traffic in the region due to the temporary increase in the size of the
workforce at St. Lucie required to implement the EPU. The proposed EPU
also could generate increased tax revenues for the State and
surrounding counties due to increased power generation.
Approximately 800 full-time employees work at St. Lucie. For the
recently completed Unit 1 outage, this workforce was augmented by an
additional 750 EPU workers on average, with a peak of 1,703 workers.
For the mid-cycle Unit 1 outage, FPL estimates no additional staff. For
the upcoming Unit 2 outage, FPL estimates an average of 1,058 workers,
with a peak of 1,439 workers. Once EPU-related plant modifications have
been completed, the size of the refueling outage workforce at St. Lucie
would return to normal levels and would remain similar to pre-EPU
levels, with no significant increases during future refueling outages.
The size of the regular plant operations workforce would be unaffected
by the proposed EPU.
The NRC expects most of the EPU plant modification workers to
relocate temporarily to communities in St. Lucie, Martin, Indian River,
and Palm Beach Counties, resulting in short-term increases in the local
population along with increased demands for public services and
housing. Because plant modification work would be temporary, most
workers would stay in available rental homes, apartments, mobile homes,
and camper-trailers. The 2010 American Community Survey 1-year estimate
for vacant housing units reported 32,056 vacant housing units in St.
Lucie County; 18,042 in Martin County; 23,236 in Indian River County;
and 147,910 in Palm Beach County that could potentially ease the demand
for local rental housing. Therefore, the NRC expects a temporary
increase in plant employment for a short duration that would have
little or no noticeable effect on the availability of housing in the
region.
The additional number of refueling outage workers and truck
material and equipment deliveries needed to support EPU-related plant
modifications would cause short-term service impacts (restricted
traffic flow and higher incident rates) on secondary roads in the
immediate vicinity of St. Lucie. The licensee expects increased traffic
volumes necessary to support implementation of the EPU-related
modifications during the refueling outage. The NRC predicted
transportation service impacts for refueling outages at St. Lucie
during its license renewal term would be small and would not require
mitigation. However, the number of temporary construction workers the
NRC evaluated for SEIS-11 was less than the number of temporary
construction workers required for the proposed EPU. Based on this
information and that EPU-related plant modifications would occur during
a normal refueling outage, there could be noticeable short-term (during
certain hours of the day), level-of-service traffic impacts beyond what
is experienced during normal outages. In the past, during periods of
high traffic volume (i.e., morning and afternoon shift changes), FPL
has attempted to stagger work schedules to minimize any impacts, has
established satellite parking areas, and use buses to transport workers
on and off the site. Local police officials have also been used to
direct traffic entering and leaving the north and south ends of St.
Lucie to minimize level-of-service impacts (ADAMS Accession No.
ML12132A067).
St. Lucie currently pays annual real estate property taxes to the
St. Lucie County school district, the County Board of Commissioners,
the County fire district, and the South Florida Water Management
District. The annual amount of future property taxes St. Lucie would
pay could take into account the increased value of St. Lucie as a
result of the EPU and increased power generation. But due to the short
duration of EPU-related plant modification activities, there would be
[[Page 40100]]
little or no noticeable effect on tax revenues generated by additional
temporary workers residing in St. Lucie County.
In total, the NRC expects no significant socioeconomic impacts from
EPU-related plant modifications and future operations after
implementation of the EPU in the vicinity of St. Lucie.
Environmental Justice Impact Analysis
The environmental justice impact analysis evaluates the potential
for disproportionately high and adverse human health and environmental
effects on minority and low-income populations that could result from
activities associated with the proposed EPU at St. Lucie. Such effects
may include human health, biological, cultural, economic, or social
impacts. Minority and low-income populations are subsets of the general
public residing in the vicinity of St. Lucie, and all are exposed to
the same health and environmental effects generated from activities at
St. Lucie.
The NRC considered the demographic composition of the area within a
50-mi (80.5-km) radius of St. Lucie to determine the location of
minority and low-income populations using the U.S. Census Bureau data
for 2010 and whether they may be affected by the proposed action.
According to 2010 census data, an estimated 1.3 million people live
within a 50-mi (80.5-km) radius of St. Lucie within parts of nine
counties. Minority populations within 50 mi (80.5 km) comprise 37
percent (approximately 466,800 persons). The largest minority group was
Hispanic or Latino (of any race) (approximately 223,700 persons or 17.7
percent), followed by Black or African-American (approximately 203,900
persons or 16.2 percent). The 2010 census block groups containing
minority populations were concentrated in Gifford (Indian River
County), Fort Pierce (St. Lucie County), Pahokee (Palm Beach County
near Lake Okeechobee), the agricultural areas around Lake Okeechobee,
and Hobe Sound (Martin County).
According to the 2010 American Community Survey 1-Year Estimates
data, an average of 10.6 percent of the population (267,000 persons)
residing in counties in a 50 mi (80.5 km) of St. Lucie were considered
low-income, living below the 2010 federal poverty threshold of $22,113
for a family of four. According to the 2010 American Community Survey
1-Year census estimates, the median household income for Florida was
$44,409, while 12.0 percent of families and 16.5 percent of the State
population were determined to be living below the Federal poverty
threshold. St. Lucie County had a lower median household income average
($38,671) and higher percentages of families (14.1 percent) and
individuals (18 percent) living below the poverty threshold,
respectively.
Potential impacts to minority and low-income populations would
mostly consist of environmental and socioeconomic effects (e.g., noise,
dust, traffic, employment, and housing impacts). Radiation doses from
plant operations after implementation of the EPU are expected to
continue to remain well below regulatory limits.
Noise and dust impacts would be temporary and limited to onsite
activities. Minority and low-income populations residing along site
access roads could experience increased commuter vehicle traffic during
shift changes. Increased demand for inexpensive rental housing during
the EPU-related plant modifications could disproportionately affect
low-income populations; however, due to the short duration of the EPU-
related work and the availability of housing properties, impacts to
minority and low-income populations would be of short duration and
limited. According to the 2010 census information, there were
approximately 221,244 vacant housing units in St. Lucie County and the
surrounding three counties combined.
Based on this information and the analysis of human health and
environmental impacts presented in this EA, the proposed EPU would not
have disproportionately high and adverse human health and environmental
effects on minority and low-income populations residing in the vicinity
of St. Lucie.
Nonradiological Cumulative Impacts
The NRC considered potential cumulative impacts on the environment
resulting from the incremental impact of the proposed EPU when added to
other past, present, and reasonably foreseeable future actions in the
vicinity of St. Lucie. Since the NRC is unaware of any other actions in
the vicinity of St. Lucie, the NRC concludes that there are no
significant nonradiological cumulative impacts.
Additionally, the NRC concluded that there would be no significant
cumulative impacts to air quality, groundwater, threatened and
endangered species, or historical and archaeological resources near St.
Lucie because the contributory effect of ongoing actions within the
region are regulated and monitored through a permitting process (e.g.,
National Pollutant Discharge Elimination System and 401/404 permits
under the Clean Water Act) under State or Federal authority. In these
cases, impacts are managed as long as these actions comply with their
respective permits and conditions of certification.
Nonradiological Impacts Summary
As discussed above, the proposed EPU would not result in any
significant nonradiological impacts. Table 1 summarizes the
nonradiological environmental impacts of the proposed EPU at St. Lucie.
Table 1--Summary of Nonradiological Environmental Impacts
------------------------------------------------------------------------
------------------------------------------------------------------------
Land Use..................... No significant impacts on land use
conditions and aesthetic resources in
the vicinity of St. Lucie.
Air Quality.................. No significant impacts to air quality
from temporary air quality impacts from
vehicle emissions related to EPU
construction workforce.
Water Use.................... No significant changes to impacts caused
by current operations. No significant
impacts on groundwater or surface water
resources.
Aquatic Resources............ No significant changes to impacts caused
by current operation due to impingement,
entrainment, and thermal discharges.
Terrestrial Resources........ No significant changes to impacts caused
by current operations. No significant
impacts to terrestrial resources.
Threatened and Endangered No significant changes to impacts caused
Species. by current operations. The NRC expects
NMFS to issue a biological opinion on
sea turtles and the small tooth sawfish
in the near future.
Historic and Archaeological No significant impacts to historic and
Resources. archaeological resources onsite or in
the vicinity of St. Lucie.
Socioeconomics............... No significant changes to impacts caused
by current operations. No significant
socioeconomic impacts from
EPU[dash]related temporary increase in
workforce.
[[Page 40101]]
Environmental Justice........ No disproportionately high or adverse
human health and environmental effects
on minority and low-income populations
in the vicinity of St. Lucie.
Cumulative Impacts........... No significant changes to impacts caused
by current operations.
------------------------------------------------------------------------
Radiological Impacts
Radioactive Gaseous and Liquid Effluents and Solid Waste
St. Lucie uses waste treatment systems to collect, process,
recycle, and dispose of gaseous, liquid, and solid wastes that contain
radioactive material in a safe and controlled manner within NRC and EPA
radiation safety standards. The licensee's evaluation of plant
operation under proposed EPU conditions show that no physical changes
would be needed to the radioactive gaseous, liquid, or solid waste
systems. Therefore, the NRC has determined that the impact from the
proposed EPU on the radioactive gaseous, liquid, and solid waste
systems would not be significant.
Radioactive Gaseous Effluents
The radioactive gaseous system manages radioactive gases generated
during the nuclear fission process and is part of the gaseous waste
management system. Radioactive gaseous wastes are principally
activation gases and fission product radioactive noble gases resulting
from process operations, including continuous cleanup of the reactor
coolant system, gases used for tank cover gas, and gases collected
during venting. The licensee's evaluation determined that
implementation of the proposed EPU would not significantly increase the
inventory of carrier gases normally processed in the gaseous waste
management system, because plant system functions are not changing, and
the volume inputs remain the same. The licensee's analysis also showed
that the proposed EPU would result in an increase (a bounding maximum
of 13.2 percent for all noble gases, particulates, radioiodines, and
tritium) in the equilibrium radioactivity in the reactor coolant, which
in turn increases the radioactivity in the waste disposal systems and
radioactive gases released from the plant.
The licensee's evaluation concluded that the proposed EPU would not
change the radioactive gaseous waste system's design function and
reliability to safely control and process the waste. The existing
equipment and plant procedures that control radioactive releases to the
environment will continue to be used to maintain radioactive gaseous
releases within the dose limits of 10 CFR 20.1302 and the as low as is
reasonably achievable (ALARA) dose objectives in 10 CFR Part 50,
Appendix I. Therefore, the NRC has determined that the impact from the
proposed EPU on the management of radioactive gaseous effluents would
not be significant.
Radioactive Liquid Effluents
The liquid waste management system collects, processes, and
prepares radioactive liquid waste for disposal. Radioactive liquid
wastes include liquids from various equipment drains, floor drains, the
chemical and volume control system, steam generator blowdown, chemistry
laboratory drains, laundry drains, decontamination area drains, and
liquids used to transfer solid radioactive waste. The licensee's
evaluation shows that the proposed EPU implementation would not
significantly increase the inventory of liquid normally processed by
the liquid waste management system. This is because the system
functions are not changing and the volume inputs remain the same. The
proposed EPU would result in an increase in the equilibrium
radioactivity in the reactor coolant (12.2 percent), which in turn
would impact the concentrations of radioactive nuclides in the waste
disposal systems.
The licensee stated that because the composition of the radioactive
material in the waste and the volume of radioactive material processed
through the system are not expected to significantly change, the
current design and operation of the radioactive liquid waste system
will accommodate the effects of the proposed EPU. The existing
equipment and plant procedures that control radioactive releases to the
environment will continue to be used to maintain radioactive liquid
releases within the dose limits of 10 CFR 20.1302 and ALARA dose
objectives in 10 CFR Part 50, Appendix I. Therefore, the NRC has
determined that the impact from the proposed EPU on the management of
radioactive liquid effluents would not be significant.
Radioactive Solid Wastes
Radioactive solid wastes include solids recovered from the reactor
coolant systems, solids that come into contact with the radioactive
liquids or gases, and solids used in the reactor coolant system
operation. The licensee evaluated the potential effects of the proposed
EPU on the solid waste management system. The largest volume of
radioactive solid waste is low-level radioactive waste, which includes
bead resin, spent filters, and dry active waste (DAW) that result from
routine plant operation, refueling outages, and routine maintenance.
The DAW includes paper, plastic, wood, rubber, glass, floor sweepings,
cloth, metal, and other types of waste generated during routine
maintenance and outages.
The licensee states that the proposed EPU would not have a
significant effect on the generation of radioactive solid waste volume
from the primary reactor coolant and secondary side systems because
system functions are not changing, and the volume inputs remain
consistent with historical generation rates. The waste can be handled
by the solid waste management system without modification. The
equipment is designed and operated to process the waste into a form
that minimizes potential harm to the workers and the environment. Waste
processing areas are monitored for radiation, and safety features are
in place to ensure worker doses are maintained within regulatory
limits. The proposed EPU would not generate a new type of waste or
create a new waste stream. Therefore, the NRC has determined that the
impact from the proposed EPU on the management of radioactive solid
waste would not be significant.
Occupational Radiation Dose at the EPU Power Level
The licensee stated that the in-plant radiation sources are
expected to increase approximately linearly with the proposed increase
in core power level of 12.2 percent. For the radiological impact
analyses, the licensee conservatively assumed an increase to the
licensed thermal power level from 2,700 MWt to 3,030 MWt or 12.2
percent, although the EPU request is for an increase to the licensed
thermal power level to 3,020 MWt or 11.85 percent. To protect the
workers, the licensee's radiation protection program monitors radiation
levels throughout the plant to establish appropriate work controls,
training, temporary shielding, and protective equipment requirements so
that worker doses will remain within the dose limits of 10 CFR Part 20
and ALARA.
[[Page 40102]]
In addition to the work controls implemented by the radiation
protection program, permanent and temporary shielding is used
throughout St. Lucie to protect plant personnel against radiation from
the reactor and auxiliary systems. The licensee determined that the
current shielding design, which uses conservative analytical techniques
to establish the shielding requirements, is adequate to offset the
increased radiation levels that are expected to occur from the proposed
EPU. Based on these findings, the NRC does not expect the proposed EPU
to significantly affect radiation levels within the plant and,
therefore, there would not be a significant radiological impact to the
workers.
Offsite Doses at the EPU Power Level
The primary sources of offsite dose to members of the public from
St. Lucie are radioactive gaseous and liquid effluents. The licensee
predicts that because of the EPU, maximum annual total and organ doses
would increase by 12.2 percent. This would still be within the NRC's
regulatory limits. As previously discussed, operation at the EPU power
level will not change the ability of the radioactive gaseous and liquid
waste management systems to perform their intended functions. Also,
there would be no change to the radiation monitoring system and
procedures used to control the release of radioactive effluents in
accordance with NRC radiation protection standards in 10 CFR Part 20
and 10 CFR Part 50, Appendix I.
Based on the above, the offsite radiation dose to members of the
public would continue to be within NRC and EPA regulatory limits and,
therefore, would not be significant.
Spent Nuclear Fuel
Spent fuel from St. Lucie is stored in the plant's spent fuel pool.
St. Lucie is licensed to use uranium-dioxide fuel that has a maximum
enrichment of 4.5 percent by weight uranium-235. Approval of the
proposed EPU would increase the maximum fuel enrichment to 4.6 percent
by weight uranium-235. The average fuel assembly discharge burnup for
the proposed EPU is expected to be limited to 49,000 megawatt days per
metric ton uranium (MWd/MTU) with no fuel pins exceeding the maximum
fuel rod burnup limit of 62,000 MWd/MTU for Unit 1 and 60,000 MWd/MTU
for Unit 2. The FPL's fuel reload design goals will maintain the St.
Lucie fuel cycles within the limits bounded by the impacts analyzed in
10 CFR Part 51, Table S-3--Uranium Fuel Cycle Environmental Data and
Table S-4--Environmental Impact of Transportation of Fuel and Waste to
and From One Light-Water-Cooled Nuclear Power Reactor, as supplemented
by NUREG-1437, Volume 1, Addendum1, ``Generic Environmental Impact
Statement for License Renewal of Nuclear Plants, Main Report, Section
6.3--Transportation Table 9.1, Summary of findings on NEPA issues for
license renewal of nuclear power plants'' (ADAMS Accession No.
ML040690720). Therefore, there would be no significant impacts
resulting from spent nuclear fuel.
Postulated Design-Basis Accident Doses
Both the licensee and the NRC evaluated postulated design-basis
accidents to ensure that St. Lucie can withstand normal and abnormal
transients and a broad spectrum of postulated accidents with reasonable
assurance that the health and safety of the public will not be
endangered by operation in the proposed manner.
The licensee performed analyses according to the Alternative
Radiological Source Term methodology, updated with input and
assumptions consistent with the proposed EPU. For each design-basis
accident, radiological consequence analyses were performed using the
guidance in NRC Regulatory Guide 1.183, ``Alternative Source Terms for
Evaluating Design Basis Accidents at Nuclear Power Reactors'' (ADAMS
Accession No. ML003716792). Accident-specific total effective dose
equivalent was determined at the exclusion area boundary, at the low-
population zone, and in the control room. The analyses also include the
evaluation of the waste gas decay tank rupture event. The licensee
concluded that the calculated doses meet the acceptance criteria
specified in 10 CFR 50.67 and 10 CFR Part 50, Appendix A, General
Design Criterion 19.
The NRC is evaluating FPL's EPU applications to independently
determine whether they are acceptable to approve. The results of the
NRC evaluation and conclusion will be documented in a Safety Evaluation
Report that will be publicly available. The NRC will only approve the
proposed EPU if the radiological consequences of design-basis accidents
will not have a significant impact.
Radiological Cumulative Impacts
The radiological dose limits for protection of the public and
workers have been developed by the NRC and EPA to address the
cumulative impact of acute and long-term exposure to radiation and
radioactive material. These dose limits are codified in 10 CFR Part 20
and 40 CFR Part 190.
The cumulative radiation doses to the public and workers are
required to be within the regulations cited above. The annual public
dose limit of 25 millirem (0.25 millisieverts) in 40 CFR Part 190
applies to all reactors that may be on a site and includes any other
nearby nuclear power reactor facilities. No other nuclear power reactor
or uranium fuel cycle facility is located near St. Lucie. The NRC staff
reviewed several years of radiation dose data contained in the FPL's
annual radioactive effluent release reports for St. Lucie. The data
demonstrate that the dose to members of the public from radioactive
effluents is well within the limits of 10 CFR Part 20 and 40 CFR Part
190. To evaluate the projected dose at the EPU power level for St.
Lucie, the NRC increased the actual dose data contained in the reports
by 12 percent. The projected doses remained well within regulatory
limits. Therefore, the NRC concludes that there would not be a
significant cumulative radiological impact to members of the public
from increased radioactive effluents from St. Lucie at the proposed EPU
power level.
As previously discussed, FPL has a radiation protection program
that maintains worker doses within the dose limits in 10 CFR Part 20
during all phases of St. Lucie operations. The NRC expects continued
compliance with regulatory dose limits during operation at the proposed
EPU power level. Therefore, the NRC staff concludes that operation of
St. Lucie at the proposed EPU levels would not result in a significant
impact to worker cumulative radiological dose.
Radiological Impacts Summary
As discussed above, the proposed EPU would not result in any
significant radiological impacts. Table 2 summarizes the radiological
environmental impacts of the proposed EPU at St. Lucie.
[[Page 40103]]
Table 2--Summary of Radiological Environmental Impacts
------------------------------------------------------------------------
------------------------------------------------------------------------
Radioactive Gaseous Effluents Amount of additional radioactive gaseous
effluents generated would be handled by
the existing system.
Radioactive Liquid Effluents. Amount of additional radioactive liquid
effluents generated would be handled by
the existing system.
Radioactive Solid Waste...... Amount of additional radioactive solid
waste generated would be handled by the
existing system.
Occupational Radiation Doses. Occupational doses would continue to be
maintained within NRC limits.
Offsite Radiation Doses...... Radiation doses to members of the public
would remain below NRC and EPA radiation
protection standards.
Spent Nuclear Fuel........... The spent fuel characteristics will
remain within the bounding criteria used
in the impact analysis in 10 CFR Part
51, Table S-3 and Table S-4.
Postulated Design-Basis Calculated doses for postulated design-
Accident Doses. basis accidents would remain within NRC
limits.
Cumulative Radiological...... Radiation doses to the public and plant
workers would remain below NRC and EPA
radiation protection standards.
------------------------------------------------------------------------
Alternatives to the Proposed Action
As an alternative to the proposed action, the NRC considered denial
of the proposed EPU (i.e., the ``no-action'' alternative). Denial of
the application would result in no change in the current environmental
impacts. However, if the EPU was not approved for St. Lucie, other
agencies and electric power organizations may be required to pursue
other means, such as fossil fuel or alternative fuel power generation,
in order to provide electric generation capacity to offset future
demand. Construction and operation of such a fossil-fueled or
alternative-fueled facility could result in impacts in air quality,
land use, and waste management greater than those identified for the
proposed EPU at St. Lucie. Furthermore, the proposed EPU does not
involve environmental impacts that are significantly different from
those originally indentified in the St. Lucie Units 1 and 2 FESs and
SEIS-11.
Alternative Use of Resources
This action does not involve the use of any different resources
than those previously considered in the FESs or SEIS-11.
Agencies and Persons Consulted
Based upon a letter dated May 2, 2003, from Michael N. Stephens of
the Florida Department of Health, Bureau of Radiation Control, to
Brenda L. Mozafari, Senior Project Manager, U.S. Nuclear Regulatory
Commission, the State of Florida does not desire notification of
issuance of license amendments. Therefore, the State of Florida was not
consulted. Consultations held with NMFS, FDEP, and FDCA are discussed
and documented above.
III. Finding of No Significant Impact
Based on the details provided in the EA, the NRC concludes that
granting the proposed EPU license amendment is not expected to cause
impacts significantly greater than current operations. The proposed
action implementing the EPU for St. Lucie will not have a significant
effect on the quality of the human environment because no significant
permanent changes are involved, and the temporary impacts are within
previously disturbed areas at the site and within the capacity of the
plant systems. Accordingly, the NRC has determined it is not necessary
to prepare an environmental impact statement for the proposed action.
Dated at Rockville, Maryland, this 25th day of June 2012.
For the Nuclear Regulatory Commission.
Tracy J. Orf,
Project Manager, Plant Licensing Branch II-2, Division of Operating
Reactor Licensing, Office of Nuclear Reactor Regulation.
Summary of Comments on the Draft Environmental Assessment and Draft
Finding of No Significant Impact
Background
The U.S. Nuclear Regulatory Commission (NRC) staff published a
notice in the Federal Register requesting public review and comment on
the draft environmental assessment (EA) and draft finding of no
significant impact (FONSI) on January 6, 2012 (77 FR 813), and
established February 6, 2012, as the deadline for submitting public
comments. The NRC received comments and supplemental information from
Florida Power & Light Company (FPL or the licensee) and from a member
of the public. The correspondence associated with the comments is
provided in the NRC's Agencywide Documents Access and Management System
(ADAMS) and available as a matter of public record. Table 1 is a
summary of each correspondence, including the name and affiliation of
each commenter, a document letter code, the ADAMS accession number, and
the number of comments.
In addition, the NRC staff made editorial changes to the draft EA,
specifically the Threatened and Endangered Species section. These
editorial changes did not change the conclusion of the FONSI.
Table 1--Comments Received on the St. Lucie Extended Power Uprate (EPU)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Number of
Last name First name Affiliation Document letter ADAMS accession number comments
--------------------------------------------------------------------------------------------------------------------------------------------------------
Anderson............................. Richard L............... Florida Power & Light... A ML12037A063............ 6
Johnson.............................. Edward W................ Self.................... B ML12044A127............ 8
--------------------------------------------------------------------------------------------------------------------------------------------------------
[[Page 40104]]
Comment Review
The NRC staff reviewed each comment letter and all comments related
to similar issues and grouped topics together. This attachment presents
the comments, or summaries of comments, along with the NRC staff's
responses. When comments have resulted in a modification to the draft
EA, those changes are noted in the NRC staff's response.
Major Issues and Topics of Concern
The staff grouped comments into the following categories:
supplemental information provided to the NRC, Aquatic Resources, and
Nuclear Safety (see Table 2). Next to each set of grouped comments is a
four-component code corresponding to: the power plant (``SL'' for St.
Lucie); the document letter (A-B) that corresponds to the document
submitter from Table 1; the number of the comment from that particular
commenter; and the two-letter category comment code from Table 2.
Table 2--Draft EA Comment Categories and Comment Codes
------------------------------------------------------------------------
Comment category Comment code
------------------------------------------------------------------------
Supplemental Information................... SI
Aquatic Resources.......................... AR
Nuclear Safety............................. NS
------------------------------------------------------------------------
Supplemental Information (SI)
Comment: SL-A-1-AR
In a January 30, 2012, letter to the NRC, FPL suggested changes to
the draft EA based on supplemental information provided in its letter
to the NRC dated January 11, 2011 (ADAMS Accession No. ML110210023).
The draft EA indicated that the predicted discharge temperature
increase resulting from the St. Lucie EPU would be 2 [deg]F (1.1
[deg]C) above the current discharge temperature. The licensee clarified
that the predicted temperature increase would be 3 [deg]F (1.7 [deg]C)
and that FPL had requested from Florida Department of Environmental
Protection (FDEP) a 2 [deg]F (1.1 [deg]C) increase to the heated water
discharge temperature limit, from 113 [deg]F (45 [deg]C) before the EPU
to 115 [deg]F (46.1 [deg]C) to account for the 3 [deg]F (1.7 [deg]C)
increase after EPU completion at Units 1 and 2.
NRC Response
The NRC staff reviewed the information and incorporated the change
from a 2 [deg]F (1.1 [deg]C) temperature increase to a 3 [deg]F (1.7
[deg]C) temperature increase. Because the discharge temperature limit
did not change, consideration of the above comment does not change the
conclusion of the FONSI.
Comment: SL-A-2-SI
The licensee provided new information on the number of additional
workers expected during the EPU-related outages. The draft EA stated
that an additional 1,000 construction workers would be needed during
each outage, with a potential peak of 1,400 additional construction
workers. The licensee revised this estimate in its comment to an
average of 2,100 workers per outage, with a peak of 3,000. This comment
prompted the NRC to submit a request for additional information to FPL
on April 18, 2012. The licensee's response to the request was provided
on May 2, 2012 (ADAMS Accession No. ML12132A067). In their response,
FPL clarified that three of the four necessary EPU-related outages had
already occurred, with an additional outage planned for the fall of
2012 for Unit 2. For the recently completed outage, the average number
of additional workers was 750, with a peak of 1,703. The upcoming
outage expects an average of 1,058 additional workers, with a peak of
1,439.
The licensee provided information requested by the NRC in the areas
of land use, traffic impacts, air quality impacts, terrestrial impacts,
and cultural impacts. For land use impacts, FPL provided more detailed
information on the two parking lots that were created for the EPU-
related outages, including that surveys were conducted and best
management practices employed to minimize impacts on threatened and
endangered species, terrestrial resources, and cultural resources. For
traffic impacts, FPL provided the transportation analysis it used to
determine impact significance, as well as examples of how FPL has
mitigated traffic impacts in the past, which include shift staggering,
shuttling workers from offsite parking areas, and employing local
police to direct traffic onsite during peak conditions. For air quality
impacts, FPL provided an assessment of the potential impacts of an
additional 1,400 to 3,000 construction workers, including the results
of a traffic study and calculations for the amount of fugitive
particulate matter emissions expected to result from the increased
workforce. The licensee determined that the workforce increase would
not trigger air quality violations under the Clean Air Act and would
remain below FDEP regulations for unpermitted emissions.
NRC Response
The NRC staff reviewed this additional information and determined
that the additional workers during EPU-related outages in conjunction
with the mitigating strategies that FPL implemented to account for the
increase have no significant impacts in the areas of socioeconomic,
terrestrial resource, air quality, and land use. The NRC made the
necessary changes to the draft EA in the areas of socioeconomic,
terrestrial resource, air quality, and land use impacts. Consideration
of the above comment does not change the conclusion of the FONSI.
Comment: SL-A-3-SI
In a January 30, 2012, letter to the NRC, FPL suggested changes to
the draft EA based on supplemental information provided as Attachment
2, ``St. Lucie Plant Water Usage 2004-2009'' (ADAMS Accession No.
ML12037A063). The draft EA stated that the plant uses approximately
131,500 gallons (498 m\3\) of water per day. The draft EA did not
specify that this was a per unit withdrawal rate. The licensee provided
information based on plant records developed from FPL's Ft. Pierce
Utilities water bills for 2004 to 2009, showing that the approximate
water usage is 154,800 gallons per unit per day (586 m\3\), or a
combined average water usage rate of approximately 309,565 gallons
(1172 m\3\).
NRC Response
The NRC staff reviewed the information and incorporated the change
to the draft EA in the area of Water Use Impacts, Groundwater from
131,500 gallons (497,782 L) of water per day to 309,565 gallons
(1,171,831 L) per day, or approximately 154,800 gallons (585,981 L) per
unit per day. Under the EPU, FPL does not expect to significantly
change the amount of freshwater currently used or its supply source.
Consideration of the above comment does not change the conclusion of
the FONSI.
Comment: SL-A-4-SI
In a January 30, 2012, letter to the NRC, FPL suggested changes to
the draft EA based on supplemental information provided in its letter
to the NRC dated January 11, 2011 (ADAMS Accession No. ML110210023).
The draft EA stated that FDEP had issued a temporary variance for a
temperature increase of heated water discharge from 113 [deg]F (45
[deg]C) before the EPU to 115 [deg]F (46.1 [deg]C) after EPU completion
at Units 1 and 2. The licensee clarified that the FDEP's change to the
St. Lucie Plant's individual wastewater facility permit
[[Page 40105]]
(IWFP) was a modification, not a temporary variance. The permit
modification was issued on December 21, 2010, and was accompanied by an
Administrative Order requiring FPL to perform pre-EPU biological
monitoring and a minimum of two years of post-EPU thermal and
biological monitoring in the vicinity of St. Lucie.
NRC Response
The NRC staff reviewed the information and incorporated the change
from referring to the FDEP change as a temporary variance to a permit
modification. Consideration of the above comment does not change the
conclusion of the FONSI.
Aquatic Resources (AR)
Comment: SL-A-5-AR
The licensee disagreed with a statement in the draft EA that the
proposed increase in temperature after EPU implementation would exceed
Florida Surface Water Quality Standards. The licensee explained that,
though St. Lucie's heated water discharge currently exceeds the Thermal
Surface Water Criteria for open waters, FPL was granted a zone of
mixing variance by FDEP. The FDEP also granted FPL an increase of 2
[deg]F (1.1 [deg]C) in the instantaneous discharge temperature limit in
the IWFP modification following EPU implementation. The licensee stated
that it performs biological and thermal monitoring studies in
accordance with the IWFP, which demonstrate its continued compliance
with the State's thermal standards following EPU implementation.
NRC Response
The NRC staff reviewed the information and incorporated the change
into the final EA. While the draft EA stated that the increase in
temperature after EPU implementation would exceed Florida Surface Water
Quality Standards, the final EA states that EPU implementation will
continue to exceed Thermal Surface Water Criteria established by FDEP,
but that FPL will continue to meet its FDEP mixing zone variance limits
and will continue to perform studies to assess any potential thermal
impacts. Consideration of the above comment does not change the
conclusion of the FONSI.
Comment: SL-B-2-AR
The commenter is concerned that St. Lucie already withdraws
approximately 1 million gallons per second and that this withdrawal
amount should increase another 12 percent if a 12 percent power
increase is permitted. The commenter states that withdrawal of an
additional 100,000 gallons per second should be permitted by the NRC to
avoid a temperature increase to the plant's heated water discharge.
NRC Response
St. Lucie's thermal discharge limits are permitted and maintained
by FDEP. The NRC has no regulatory authority over thermal discharge
limits or water withdrawal permits. Therefore, no change was made to
the final EA based on this comment.
Comment: SL-B-3-AR
The commenter is concerned that the applicant's statement that the
seawater temperature beyond the plant's mixing zone of 95 [deg]F (35
[deg]C) is incorrect. The commenter would like verification of this
temperature and provides information that the average water temperature
in that area should be closer to an ambient temperature of 79 [deg]F
(26.1 [deg]C). The commenter challenges the applicant's claim of an
ambient water temperature of 95 [deg]F (35 [deg]C) and believes that an
additional temperature increase after EPU implementation will have
detrimental effects on aquatic resources.
NRC Response
As discussed in the ``Aquatic Resource Impacts'' section, a thermal
discharge study that was conducted for the proposed EPU predicts no
increase in temperature higher than 96 [deg]F (35.5 [deg]C) within 6 ft
(1.8 m) of the bottom of the ocean floor and within 24 ft (7.3 m) from
the ocean surface as a result of heated water discharged from the
multiport diffuser. The same study also predicts that heated water
discharged from the ``Y'' diffuser would not increase the ocean water
temperature higher than 96 [deg]F (35.5 [deg]C) within 2 ft (0.6 m) of
the bottom of the ocean floor and within 25 ft (17 m) from the ocean
surface. Based on this analysis, surface water temperature would remain
below 94 [deg]F (34.4 [deg]C). Thermal studies conducted for St. Lucie
prior to its operation and summarized in SEIS-11 predicted there would
be minimal impacts to aquatic biota from diffuser discharges that
result in a surface temperature less than 97 [deg]F (36.1 [deg]C).
Therefore, no change was made to the final EA based on this comment.
Comment: SL-B-4-AR
The commenter is concerned about the effects of thermal discharge
temperatures and chemical treatment on microscopic ocean organisms.
NRC Response
St. Lucie's thermal discharge limits are permitted and maintained
by FDEP. The NRC has no regulatory authority over thermal discharge
limits or water withdrawal permits. St. Lucie does inject chlorine in
the form of sodium hypochlorate into seawater upstream of the intake
cooling water system to control microorganisms, but these chemical
discharges are also regulated by FDEP. After EPU implementation, these
chemical discharges are not expected to exceed IWFP limitations and
will continue to be monitored and regulated by FDEP. Therefore, no
change was made to the final EA based on this comment.
Comment: SL-B-6-AR
The commenter provided information on the August 2011 jellyfish
incursion incident at St. Lucie and stated that the incident was not
reported publicly until December 2011. The commenter wants the NRC to
increase the timely reporting of such events to allow precautionary
safety awareness and evacuation to proceed.
NRC Response
The NRC was informed about the jellyfish intrusion incident, which
occurred between August 20, 2011 and August 24, 2011, via letter from
FPL on September 20, 2011. The letter was submitted as part of St.
Lucie's Environmental Protection Plan as an ``Unusual or Important
Environmental Event--Reportable Fish Kill.'' A License Event Report was
also submitted by FPL to the NRC describing the Unit 1 manual reactor
trip that resulted from the jellyfish influx. Both are publicly
available and can be accessed in ADAMS under Accession Nos. ML11270A098
and ML11301A071, respectively. Evacuation precautions were not
necessary during this incident because FPL manually shut down the plant
until the jellyfish incursion could be resolved. Therefore, no change
was made to the final EA based on this comment. (For a more detailed
discussion on this incident, the commenter is referred to Section 5.2
and Section 5.4.4 of the NRC's Essential Fish Habitat Assessment,
published in February 2012 (ADAMS Accession No. ML12053A345)).
Comment: SL-B-7-AR
The commenter is concerned about the potentially harmful effects of
once-through cooling systems, specifically the effects of entrainment
and impingement on marine life.
[[Page 40106]]
NRC Response
During St. Lucie's license renewal review, the NRC assessed the
environmental impacts of entrainment, impingement, and heat shock from
St. Lucie's once-through cooling system in Sections 4.1.1, 4.1.2, and
4.1.3 of the SEIS-11 (ADAMS Accession No. ML031410445). The NRC does
not expect that implementation of the EPU would increase the impacts of
entrainment, impingement, and heat shock at St. Lucie beyond the small
levels it found for current operation. Therefore, the NRC made no
change to the final EA based on this comment.
Comment: SL-B-8-AR
The commenter is concerned that smaller fish and organisms that are
entrained by the cooling system may be scalded before being discharged
into the waterway, or that those that are pulverized in the system will
be released into the water, forming a sediment cloud that will block
light from the ocean floor and cause a loss of oxygen.
NRC Response
The proposed EPU will not result in an increase in the amount or
rate of water withdrawn from or discharged to the Atlantic Ocean, so
the impacts of entrainment will remain consistent with current
operating levels. Also, the NRC staff always assumes a 100 percent
mortality rate for any organisms that are entrained by the cooling
system, and determined that implementation of the EPU would not
increase the level of entrainment mortality rate or level of impact.
The NRC concluded that scouring caused by discharged cooling water
would have a small level of impact at St. Lucie, as discussed in
Sections 4.1 and 4.1.3 of SEIS-11. The NRC also concluded that low
dissolved oxygen in the discharged water would have a small level of
impact, as discussed in Section 4.1 of SEIS-11. Therefore, the NRC made
no change to the final EA based on this comment.
Nuclear Safety (NS)
Comments: SL-B-1-NS; SL-B-5-NS
The commenter is concerned about safety issues at the plant. Most
notably, his comments are related to the age of the reactors and safety
concerns over permitting a 12 percent power increase on reactors of
that age. The commenter is concerned that an increase in heat generated
would potentially put stress on the internal components of the plant
due to the age of the components and increase risk of failure.
NRC Response
The St. Lucie Units 1 and 2 were granted, consistent with NRC
regulations, a 40-year operating licenses in 1976 and 1983,
respectively. The NRC requires licensees to test, monitor, and inspect
the condition of safety equipment and to maintain that equipment in
reliable operating condition over the operating life of the plant. The
NRC also requires licensees to continually correct deficiencies that
could affect plant safety (e.g., leaking valves, degraded or failed
components due to aging or operational events). Over the years, FPL has
also upgraded equipment or installed new equipment to replace or
supplement original systems. The testing, monitoring, inspection,
maintenance, and replacement of plant equipment provide reasonable
assurance that this equipment will perform its intended safety
functions during the 40-year license period. This conclusion applies
both to operations under the current license and operations under EPU
conditions.
In 2003, the NRC approved renewal of the operating licenses for St.
Lucie, Units 1 and 2 for a period of 20 additional years, extending the
operating licenses to 2036 and 2043, respectively. The safety
evaluation report documenting the staff's technical review can be found
in NUREG-1779, ``Safety Evaluation Report Related to the License
Renewal of the St. Lucie, Units 1 and 2'' (ADAMS Accession No.
ML031890043). The NRC staff's review concluded that the licensee's
management of the effects of aging on the functionality of structures
and components met the NRC's established requirements (described in
Title 10 of the Code of Federal Regulations Part 54).
The NRC's safety regulations are based on the Atomic Energy Act of
1954, as amended, and require a finding of reasonable assurance that
the activities authorized by an operating license (or an amendment
thereto) can be conducted without endangering the health and safety of
the public, and that such activities will be conducted in compliance
with the NRC's regulations. With respect to the proposed EPU, the NRC
will likewise decide--based on the NRC staff's safety evaluation--
whether there is reasonable assurance that the health and safety of the
public will not be endangered by operation under the proposed EPU
conditions and whether the authorized activities will be conducted in
compliance with the NRC's regulations. The NRC will document its review
of the effect of the EPU on aging management programs at St. Lucie in
the relevant subsections of its safety evaluation.
Therefore, no change was made to the final EA based on these
comments.
[FR Doc. 2012-16552 Filed 7-5-12; 8:45 am]
BILLING CODE 7590-01-P