[Federal Register Volume 73, Number 48 (Tuesday, March 11, 2008)]
[Notices]
[Pages 13029-13032]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-4861]
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NUCLEAR REGULATORY COMMISSION
[Docket Nos. STN 50-456 and STN 50-457]
Braidwood Station, Units 1 and 2; Notice of Consideration of
Issuance of Amendment to Facility Operating License, Proposed No
Significant Hazards Consideration Determination, and Opportunity for a
Hearing
The U.S. Nuclear Regulatory Commission (the Commission, or the NRC)
is considering issuance of an amendment to Facility Operating License
No. NPF-72 and Facility Operating License No. NPF-77 to Exelon
Generation Company, LLC (the licensee) for operation of the Braidwood
Station, Units 1 and 2 (Braidwood), which is located in Will County,
Illinois.
The proposed amendment in the licensee's application dated February
25, 2008, would revise Technical Specification (TS) 5.5.9, ``Steam
Generator (SG) Program,'' and TS 5.6.9, ``Steam Generator Tube
Inspection Report.'' For TS 5.5.9, the amendment would replace the
existing alternate repair criteria (ARC) in the provisions for SG tube
repair criteria during Braidwood, Unit 2, refueling outage 13 and the
subsequent operating cycle. For TS 5.6.9, three new reporting
requirements are proposed to be added to the existing seven
requirements. The proposed changes would only affect Braidwood, Unit 2;
however this is docketed for Braidwood, Units 1 and 2, since the TS are
common to Units 1 and 2.
Before issuance of the proposed license amendment, the Commission
will have made findings required by the Atomic Energy Act of 1954, as
amended (the Act), and the Commission's regulations.
The Commission has made a proposed determination that the amendment
request involves no significant hazards consideration. Under the
Commission's regulations in Title 10 of the Code of Federal Regulations
(10 CFR), section 50.92, this means that operation of the facility in
accordance with the proposed amendment would not (1) involve a
significant increase in the probability or consequences of an accident
previously evaluated; or (2) create the possibility of a new or
different kind of accident from any accident previously evaluated; or
(3) involve a significant reduction in a margin of safety. As required
by 10 CFR 50.91(a), the licensee has provided its analysis of the issue
of no significant hazards consideration, which is presented below:
(1) Does the proposed change involve a significant increase in
the probability or consequences of an accident previously evaluated?
Response: No.
Of the various accidents previously evaluated, the proposed
changes only affect the steam generator tube rupture (SGTR),
postulated steam line break (SLB), locked rotor and control rod
ejection accident evaluations. Loss-of-coolant accident (LOCA)
conditions cause a compressive axial load to act on the tube.
Therefore, since the LOCA tends to force the tube into the tubesheet
rather than pull it out, it is not a factor in this amendment
request. Another faulted load consideration is a safe shutdown
earthquake (SSE); however, the seismic
[[Page 13030]]
analysis of Model D5 steam generators has shown that axial loading
of the tubes is negligible during an SSE.
At normal operating pressures, leakage from primary water stress
corrosion cracking (PWSCC) below 17 inches from the top of the
tubesheet is limited by both the tube-to-tubesheet crevice and the
limited crack opening permitted by the tubesheet constraint.
Consequently, negligible normal operating leakage is expected from
cracks within the tubesheet region.
For the SGTR event, the required structural margins of the steam
generator tubes is maintained by limiting the allowable ligament
size for a circumferential crack to remain in service to 214 degrees
below 17 inches from the top of the tubesheet. Tube rupture is
precluded for cracks in the hydraulic expansion region due to the
constraint provided by the tubesheet. The potential for tube pullout
is mitigated by limiting the allowable crack size to 214 degrees,
which takes into account eddy current uncertainty and crack growth
rate. It has been shown that a circumferential crack with an
azimuthal extent of 214 degrees meets the performance criteria of
NEI [Nuclear Energy Institute] 97-06, Rev. 2, ``Steam Generator
Program Guidelines'' and the Draft Regulatory Guide (RG) 1.121,
``Bases for Plugging Degraded PWR Steam Generator Tubes.'' Likewise,
a visual inspection will be conducted as necessary to confirm that a
circumferential crack of greater than 294 degrees does not remain in
service in the tube-to-tubesheet weld metal in any tube thereby
mitigating the potential for tube pullout. Therefore, the margin
against tube burst/pullout is maintained during normal and
postulated accident conditions and the proposed change does not
result in a significant increase in the probability or consequence
of a SGTR.
The probability of a SLB is unaffected by the potential failure
of a SG tube as the failure of a tube is not an initiator for a SLB
event. SLB leakage is limited by leakage flow restrictions resulting
from the leakage path above potential cracks through the tube-to-
tubesheet crevice. The leak rate during postulated accident
conditions has been shown to remain within the accident analysis
assumptions for all axial or circumferentially oriented cracks
occurring 17 inches below the top of the tubesheet. Since normal
operating leakage is limited to 0.10 gallons per minute (gpm) (or
150 gallons per day (gpd)), the attendant accident condition leak
rate, assuming all leakage to be from indications below 17 inches
from the top of the tubesheet would be bounded by 0.5 gpm. This
value is within the accident analysis assumptions for the limiting
design basis accident for Braidwood 2, which is the postulated SLB
event.
Based on the above, the performance criteria of NEI-97-06, Rev.
2 and RG 1.121 continue to be met and the proposed change does not
involve a significant increase in the probability or consequences of
an accident previously evaluated.
(2) Does the proposed change create the possibility of a new or
different kind of accident from any accident previously evaluated?
Response: No.
The proposed change does not introduce any changes or mechanisms
that create the possibility of a new or different kind of accident.
Tube bundle integrity is expected to be maintained for all plant
conditions upon implementation of the interim alternate repair
criteria. The proposed change does not introduce any new equipment
or any change to existing equipment. No new effects on existing
equipment are created nor are any new malfunctions introduced.
Therefore, based on the above evaluation, the proposed changes
do not create the possibility of a new or different kind of accident
from any accident previously evaluated.
(3) Does the proposed change involve a significant reduction in
a margin of safety?
Response: No.
The proposed change maintains the required structural margins of
the steam generator tubes for both normal and accident conditions.
NEI 97-06, Rev. 2 and RG 1.121 are used as the basis in the
development of the interim alternate repair criteria (IARC)
methodology for determining that steam generator tube integrity
considerations are maintained within acceptable limits. RG 1.121
describes a method acceptable to the NRC staff for meeting General
Design Criteria 14, 15, 31, and 32 by reducing the probability and
consequences of an SGTR. RG 1.121 concludes that by determining the
limiting safe conditions of tube wall degradation beyond which tubes
with unacceptable cracking, as established by inservice inspection,
should be removed from service or repaired, the probability and
consequences of a SGTR are reduced. This RG uses safety factors on
loads for tube burst that are consistent with the requirements of
Section III of the ASME Code.
For axially oriented cracking located within the tubesheet, tube
burst is precluded due to the presence of the tubesheet. For
circumferentially oriented cracking in a tube or the tube-to-
tubeshe[e]t weld, the Westinghouse analysis, provided in report
``LTR-CDME-08-11 P-Attachment,'' defines a length of remaining tube
ligament that provides the necessary resistance to tube pullout due
to the pressure induced forces (with applicable safety factors
applied). Additionally, it is shown that application of the IARC
will not result in unacceptable primary-to-secondary leakage during
all plant conditions, including transients and postulated accident
conditions.
Based on the above, it is concluded that the proposed changes do
not result in any reduction in a margin of safety.
Based on the above, EGC [the licensee] concludes that the
proposed amendment presents no significant hazards consideration
under the standards set forth in 10 CFR 50.92(c) and, accordingly, a
finding of ``no significant hazards consideration'' is justified.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
The Commission is seeking public comments on this proposed
determination. Any comments received within 30 days after the date of
publication of this notice will be considered in making any final
determination.
Normally, the Commission will not issue the amendment until the
expiration of 60 days after the date of publication of this notice. The
Commission may issue the license amendment before expiration of the 60-
day period provided that its final determination is that the amendment
involves no significant hazards consideration. In addition, the
Commission may issue the amendment prior to the expiration of the 30-
day comment period should circumstances change during the 30-day
comment period such that failure to act in a timely way would result,
for example, in derating or shutdown of the facility. Should the
Commission take action prior to the expiration of either the comment
period or the notice period, it will publish in the Federal Register a
notice of issuance. Should the Commission make a final No Significant
Hazards Consideration Determination, any hearing will take place after
issuance. The Commission expects that the need to take this action will
occur very infrequently.
Written comments may be submitted by mail to the Chief, Rulemaking,
Directives and Editing Branch, Division of Administrative Services,
Office of Administration, U.S. Nuclear Regulatory Commission,
Washington, DC 20555-0001, and should cite the publication date and
page number of this Federal Register notice. Written comments may also
be delivered to Room 6D59, Two White Flint North, 11545 Rockville Pike,
Rockville, Maryland, from 7:30 a.m. to 4:15 p.m. Federal workdays.
Documents may be examined, and/or copied for a fee, at the NRC's Public
Document Room (PDR), located at One White Flint North, Public File Area
O1F21, 11555 Rockville Pike (first floor), Rockville, Maryland.
The filing of requests for hearing and petitions for leave to
intervene is discussed below.
Within 60 days after the date of publication of this notice, the
person(s) may file a request for a hearing with respect to issuance of
the amendment to the subject facility operating license and any
person(s) whose interest may be affected by this proceeding and who
wishes to participate as a party in the proceeding must file a written
request via electronic submission through the
[[Page 13031]]
NRC E-filing system for a hearing and a petition for leave to
intervene. Requests for a hearing and a petition for leave to intervene
shall be filed in accordance with the Commission's ``Rules of Practice
for Domestic Licensing Proceedings'' in 10 CFR Part 2. Interested
person(s) should consult a current copy of 10 CFR 2.309, which is
available at the Commission's PDR, located at One White Flint North,
Public File Area O1F21, 11555 Rockville Pike (first floor), Rockville,
Maryland. Publicly available records will be accessible from the
Agencywide Documents Access and Management System's (ADAMS) Public
Electronic Reading Room on the Internet at the NRC Web site, http://www.nrc.gov/reading-rm/doc-collections/cfr/. If a request for a hearing
or petition for leave to intervene is filed by the above date, the
Commission or a presiding officer designated by the Commission or by
the Chief Administrative Judge of the Atomic Safety and Licensing Board
Panel will rule on the request and/or petition; and the Secretary or
the Chief Administrative Judge of the Atomic Safety and Licensing Board
will issue a notice of a hearing or an appropriate order.
As required by 10 CFR 2.309, a petition for leave to intervene
shall set forth with particularity the interest of the petitioner in
the proceeding, and how that interest may be affected by the results of
the proceeding. The petition should specifically explain the reasons
why intervention should be permitted with particular reference to the
following general requirements: (1) The name, address and telephone
number of the requestor or petitioner; (2) the nature of the
requestor's/petitioner's right under the Act to be made a party to the
proceeding; (3) the nature and extent of the requestor's/petitioner's
property, financial, or other interest in the proceeding; and (4) the
possible effect of any decision or order which may be entered in the
proceeding on the requestor's/petitioner's interest. The petition must
also identify the specific contentions which the petitioner/requestor
seeks to have litigated at the proceeding.
Each contention must consist of a specific statement of the issue
of law or fact to be raised or controverted. In addition, the
petitioner/requestor shall provide a brief explanation of the bases for
the contention and a concise statement of the alleged facts or expert
opinion which support the contention and on which the petitioner
intends to rely in proving the contention at the hearing. The
petitioner/requestor must also provide references to those specific
sources and documents of which the petitioner is aware and on which the
petitioner intends to rely to establish those facts or expert opinion.
The petition must include sufficient information to show that a genuine
dispute exists with the applicant on a material issue of law or fact.
Contentions shall be limited to matters within the scope of the
amendment under consideration. The contention must be one which, if
proven, would entitle the petitioner to relief. A petitioner/requestor
who fails to satisfy these requirements with respect to at least one
contention will not be permitted to participate as a party.
Those permitted to intervene become parties to the proceeding,
subject to any limitations in the order granting leave to intervene,
and have the opportunity to participate fully in the conduct of the
hearing.
If a hearing is requested, the Commission will make a final
determination on the issue of no significant hazards consideration. The
final determination will serve to decide when the hearing is held. If
the final determination is that the amendment request involves no
significant hazards consideration, the Commission may issue the
amendment and make it immediately effective, notwithstanding the
request for a hearing. Any hearing held would take place after issuance
of the amendment. If the final determination is that the amendment
request involves a significant hazards consideration, any hearing held
would take place before the issuance of any amendment.
A request for hearing or a petition for leave to intervene must be
filed in accordance with the NRC E-Filing rule, which the NRC
promulgated on August 28, 2007 (72 FR 49139). The E-Filing process
requires participants to submit and serve documents over the Internet
or in some cases to mail copies on electronic storage media.
Participants may not submit paper copies of their filings unless they
seek a waiver in accordance with the procedures described below.
To comply with the procedural requirements of E-Filing, at least
five (5) days prior to the filing deadline, the petitioner/requestor
must contact the Office of the Secretary by e-mail at
[email protected], or by calling (301) 415-1677, to request (1) a
digital ID certificate, which allows the participant (or its counsel or
representative) to digitally sign documents and access the E-Submittal
server for any proceeding in which it is participating; and/or (2)
creation of an electronic docket for the proceeding (even in instances
in which the petitioner/requestor (or its counsel or representative)
already holds an NRC-issued digital ID certificate). Each petitioner/
requestor will need to download the Workplace Forms Viewer
TM to access the Electronic Information Exchange (EIE), a
component of the E-Filing system. The Workplace Forms Viewer
TM is free and is available at http://www.nrc.gov/site-help/e-submittals/install-viewer.html. Information about applying for a
digital ID certificate is available on NRC's public Web site at http://www.nrc.gov/site-help/e-submittals/apply-certificates.html.
Once a petitioner/requestor has obtained a digital ID certificate,
had a docket created, and downloaded the EIE viewer, it can then submit
a request for hearing or petition for leave to intervene. Submissions
should be in Portable Document Format (PDF) in accordance with NRC
guidance available on the NRC public Web site at http://www.nrc.gov/site-help/e-submittals.html. A filing is considered complete at the
time the filer submits its documents through EIE. To be timely, an
electronic filing must be submitted to the EIE system no later than
11:59 p.m. Eastern Time on the due date. Upon receipt of a
transmission, the E-Filing system time-stamps the document and sends
the submitter an e-mail notice confirming receipt of the document. The
EIE system also distributes an e-mail notice that provides access to
the document to the NRC Office of the General Counsel and any others
who have advised the Office of the Secretary that they wish to
participate in the proceeding, so that the filer need not serve the
documents on those participants separately. Therefore, applicants and
other participants (or their counsel or representative) must apply for
and receive a digital ID certificate before a hearing request/petition
to intervene is filed so that they can obtain access to the document
via the E-Filing system.
A person filing electronically may seek assistance through the
``Contact Us'' link located on the NRC Web site at http://www.nrc.gov/site-help/e-submittals.html or by calling the NRC technical help line,
which is available between 8:30 a.m. and 4:15 p.m., Eastern Time,
Monday through Friday. The help line number is (800) 397-4209 or
locally, (301) 415-4737. Participants who believe that they have a good
cause for not submitting documents electronically must file a motion,
in accordance with 10 CFR 2.302(g), with their initial paper filing
requesting authorization to continue to submit
[[Page 13032]]
documents in paper format. Such filings must be submitted by: (1) First
class mail addressed to the Office of the Secretary of the Commission,
U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001,
Attention: Rulemaking and Adjudications Staff; or (2) courier, express
mail, or expedited delivery service to the Office of the Secretary,
Sixteenth Floor, One White Flint North, 11555 Rockville Pike,
Rockville, Maryland 20852, Attention: Rulemaking and Adjudications
Staff. Participants filing a document in this manner are responsible
for serving the document on all other participants. Filing is
considered complete by first-class mail as of the time of deposit in
the mail, or by courier, express mail, or expedited delivery service
upon depositing the document with the provider of the service.
Non-timely requests and/or petitions and contentions will not be
entertained absent a determination by the Commission, the presiding
officer, or the Atomic Safety and Licensing Board that the petition
and/or request should be granted and/or the contentions should be
admitted, based on a balancing of the factors specified in 10 CFR
2.309(c)(1)(i)-(viii). To be timely, filings must be submitted no later
than 11:59 p.m. Eastern Time on the due date.
Documents submitted in adjudicatory proceedings will appear in
NRC's electronic hearing docket which is available to the public at
http://ehd.nrc.gov/EHD_Proceeding/home.asp, unless excluded pursuant
to an order of the Commission, an Atomic Safety and Licensing Board, or
a Presiding Officer. Participants are requested not to include personal
privacy information, such as social security numbers, home addresses,
or home phone numbers in their filings. With respect to copyrighted
works, except for limited excerpts that serve the purpose of the
adjudicatory filings and would constitute a Fair Use application,
Participants are requested not to include copyrighted materials in
their submissions.
For further details with respect to this license amendment
application, see the letter dated February 25, 2008, from the Exelon
Generation Company, LLC, which is available for public inspection at
the Commission's PDR, located at One White Flint North, File Public
Area O1 F21, 11555 Rockville Pike (first floor), Rockville, Maryland.
Publicly available records will be accessible electronically from the
Agencywide Documents Access and Management System's (ADAMS) Public
Electronic Reading Room on the Internet at the NRC Web site, http://www.nrc.gov/reading-rm/adams.html. Persons who do not have access to
ADAMS or who encounter problems in accessing the documents located in
ADAMS, should contact the NRC PDR Reference staff by telephone at 1-
800-397-4209, 301-415-4737, or by e-mail to [email protected].
Dated at Rockville, Maryland, this 4th day of March 2008.
For the Nuclear Regulatory Commission.
Meghan M. Thorpe-Kavanaugh,
Project Manager, Plant Licensing Branch III-2, Division of Operating
Reactor Licensing, Office of Nuclear Reactor Regulation.
[FR Doc. E8-4861 Filed 3-10-08; 8:45 am]
BILLING CODE 7590-01-P