[Federal Register Volume 75, Number 44 (Monday, March 8, 2010)]
[Rules and Regulations]
[Pages 10410-10411]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-4846]
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NUCLEAR REGULATORY COMMISSION
10 CFR Part 50
[NRC-2007-0008]
RIN 3150-AI01
Alternate Fracture Toughness Requirements for Protection Against
Pressurized Thermal Shock Events; Correcting Amendment
AGENCY: Nuclear Regulatory Commission.
ACTION: Final rule; correcting amendment.
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SUMMARY: The Nuclear Regulatory Commission (NRC) is revising its
regulations to add a table that was inadvertently omitted in a
correction document published on February 3, 2010 (75 FR 5495). The
February 3, 2010 document corrected a final rule published on January
4, 2010 (75 FR 13), that amends the NRC's regulations to provide
alternate fracture toughness requirements for protection against
pressurized thermal shock (PTS) events for pressurized water reactor
(PWR) pressure vessels.
DATES: The correction is effective March 8, 2010, and is applicable to
February 3, 2010, the date the original rule became effective.
FOR FURTHER INFORMATION CONTACT: Michael T. Lesar, Chief, Rulemaking
and Directives Branch, Office of Administration, Nuclear Regulatory
Commission, Washington, DC 20555-0001, telephone 301-492-3663, e-mail
[email protected].
SUPPLEMENTARY INFORMATION: This document adds Table 7 to the NRC's
regulations at 10 CFR 50.61a(g) which was inadvertently omitted in a
document published on February 3, 2010 (75 FR 5495). Therefore, the NRC
finds that notice and opportunity for public comment on this corrective
action is unnecessary.
List of Subjects in 10 CFR Part 50
Antitrust, Classified information, Criminal penalties, Fire
protection, Intergovernmental relations, Nuclear power plants and
reactors, Radiation protection, Reactor siting criteria, Reporting and
recordkeeping requirements.
For the reasons set out in the preamble and under the authority of
the Atomic Energy Act of 1954, as amended; the Energy Reorganization
Act of 1974, as amended; and 5 U.S.C. 552 and 553, the NRC is adopting
the following amendments to 10 CFR part 50.
[[Page 10411]]
PART 50--DOMESTIC LICENSING OF PRODUCTION AND UTILIZATION
FACILITIES
0
1. The authority citation for part 50 continues to read as follows:
Authority: Secs. 102, 103, 104, 105, 161, 182, 183, 186, 189,
68 Stat. 936, 937, 938, 948, 953, 954, 955, 956, as amended, sec.
234, 83 Stat. 444, as amended (42 U.S.C. 2132, 2133, 2134, 2135,
2201, 2232, 2233, 2236, 2239, 2282); secs. 201, as amended, 202,
206, 88 Stat. 1242, as amended, 1244, 1246 (42 U.S.C. 5841, 5842,
5846); sec. 1704, 112 Stat. 2750 (44 U.S.C. 3504 note); Energy
policy Act of 2005, Pub. L. No. 109-58, 119 Stat. 194 (2005).
Section 50.7 also issued under Pub. L. 95-601, sec. 10, 92 Stat.
2951 as amended by Pub. L. 102-486, sec. 2902, 106 Stat. 3123 (42
U.S.C. 5841). Section 50.10 also issued under secs. 101, 185, 68
Stat. 955, as amended (42 U.S.C. 2131, 2235); sec. 102, Pub. L. 91-
190, 83 Stat. 853 (42 U.S.C. 4332). Sections 50.13, 50.54(dd), and
50.103 also issued under sec. 108, 68 Stat. 939, as amended (42
U.S.C. 2138).
Sections 50.23, 50.35, 50.55, and 50.56 also issued under sec.
185, 68 Stat. 955 (42 U.S.C. 2235). Sections 50.33a, 50.55a and
Appendix Q also issued under sec. 102, Pub. L. 91-190, 83 Stat. 853
(42 U.S.C. 4332). Sections 50.34 and 50.54 also issued under sec.
204, 88 Stat. 1245 (42 U.S.C. 5844). Sections 50.58, 50.91, and
50.92 also issued under Pub. L. 97-415, 96 Stat. 2073 (42 U.S.C.
2239). Section 50.78 also issued under sec. 122, 68 Stat. 939 (42
U.S.C. 2152). Sections 50.80-50.81 also issued under sec. 184, 68
Stat. 954, as amended (42 U.S.C. 2234). Appendix F also issued under
sec. 187, 68 Stat. 955 (42 U.S.C. 2237).
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2. In Sec. 50.61a, paragraph (g) is amended by adding Table 7 directly
after Table 6 to read as follows:
Sec. 50.61a Alternate fracture toughness requirements for protection
against pressurized thermal shock events.
* * * * *
(g) * * *
Table 7--Threshold Values for the Outlier Deviation Test (Significance
Level = 1%)
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Second largest Largest
allowable allowable
Number of available data points (n) normalized normalized
residual value residual value
(r*) (r*)
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3....................................... 1.55 2.71
4....................................... 1.73 2.81
5....................................... 1.84 2.88
6....................................... 1.93 2.93
7....................................... 2.00 2.98
8....................................... 2.05 3.02
9....................................... 2.11 3.06
10...................................... 2.16 3.09
11...................................... 2.19 3.12
12...................................... 2.23 3.14
13...................................... 2.26 3.17
14...................................... 2.29 3.19
15...................................... 2.32 3.21
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Dated at Rockville, Maryland, this 2nd day of March 2010.
For the Nuclear Regulatory Commission.
Michael T. Lesar,
Chief, Rulemaking and Directives Branch, Division of Administrative
Services, Office of Administration.
[FR Doc. 2010-4846 Filed 3-5-10; 8:45 am]
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