NL-13-2576, CFR50.46 ECCS Evaluation Model Annual Report for 2012

CFR50.46 ECCS Evaluation Model Annual Report for 2012

ML13357A710
Person / Time
Site:	Hatch, Vogtle
Issue date:	12/23/2013
From:	Pierce C Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-13-2576
Download: ML13357A710 (12)

Text

Charles R. Pierce Southern Nuclear Regulatory Affairs Director Operating Company. Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7872 Fax 205 9927601 December 23, 2013 SOUTHERN ' \

COMPANY Docket Nos: 50-321 50-424 NL-13-2576 50-366 50-425 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Units 1 and 2 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Ladies and Gentlemen:

Southern Nuclear Operating Company (SNC) is the licensed operator for the Edwin I. Hatch Nuclear Plant (Hatch) and Vogtle Electric Generating Plant (Vogtle). The requirements of 10 CFR 50.46(a)(3)(ii) include an annual report by licensees of changes to or errors in acceptable emergency core cooling system (ECCS) models that affect the temperature calculation and the estimated effect of changes or errors on the limiting ECCS analYSis. Accordingly, the reports required by 10 CFR 50.46(a)(3)(ii) for Hatch and Vogtle is provided in Enclosures 1 and 2, respectively. The resulting peak cladding temperature (PCT) for Hatch and Vogtle continue to meet the criterion of 10 CFR 50.46(b)(1) (i.e., S 2200°F).

This letter contains no NRC commitments. If you have any questions, please contact Ken McElroy at (205) 992-7369.

Respectfully submitted, C. R. Pierce Regulatory Affairs Director CRP/RM..I/lac

Enclosures:

1. Edwin I. Hatch Nuclear Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012

2. Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012

U. S. Nuclear Regulatory Commission NL-13-2576 Page 2 cc: Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bost, Executive Vice President & Chief Nuclear Officer Mr. D. R. Vineyard, Vice President - Hatch Mr. T. E. Tynan, Vice President - Vogtle Mr. D. R. Madison, Vice President - Fleet Operations Mr. B. L. Ivey, Vice President - Regulatory Affairs RType: CHA02.004; CVC7000 U. S. Nuclear Regulatory Commission Mr. V. M. McCree, Regional Administrator Mr. E. D. Morris, Senior Resident Inspector - Hatch Mr. L. M. Cain, Senior Resident Inspector - Vogtle Mr. R.E. Martin, NRR Project Manager - Hatch, Vogtle

Edwin I. Hatch Nuclear Plant Units 1 and 2 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Enclosure 1 Edwin I. Hatch Nuclear Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 to NL-13-2576 Edwin I. Hatch Nuclear Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Edwin I. Hatch Nuclear Plant Unit 1 SAFERIGESTR-LOCA Analysis Model Table 1-1 a - Summary of Changes/Errors (2012)

Estimated Descri ption Effect (f1 PCT)

PRIME code implementation for fuel rod T/M performance, 10 replacing GESTR Table 1-1 b - Cumulative Impact of Changes/Errors GE14 Description f1IPCTI (OF)

• Changes/Errors Previously Reported (Reference 1) 0

• Current Year - 2012 (Reference 2) 10 10 Cumulative Total E1-1 to NL-13-2576 Edwin I. Hatch Nuclear Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Edwin I. Hatch Nuclear Plant Unit 2 SAFERIGESTR-LOCA Analysis Model Table 1-2a - Summary of Changes/Errors (2012)

Estimated Description Effect (Ll PCT)

PRIME code implementation for fuel rod T/M performance, 10 replacing GESTR Table 1-2b - Cumulative Impact of Changes/Errors GE14 Description LlIPCTI (OF)

• Changes/Errors Previously Reported (Reference 1) 0

• Current Year - 2012 (Reference 3) 10 10 Cumulative Total E1-2 to NL-13-2576 Edwin I. Hatch Nuclear Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012

References:

1. Letter from Mark J. Ajluni to USNRC (NL-12-2567), "Edwin I. Hatch Nuclear Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2011," dated December 18, 2012.

2. GNF Supplemental Reload Licensing Report 00N0481-SRLR Revision 0 Class I December 2013, "Supplemental Reload Licensing Report for Edwin I.

Hatch Nuclear Power Plant Unit 1 Reload 26 Cycle 27'.

3. GNF Supplemental Reload licensing Report 0000-0145-7166-SRLR Revision o Class I December 2012, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 2 Reload 22 Cycle 23".

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Edwin I. Hatch Nuclear Plant Units 1 and 2 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Enclosure 2 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 to NL-13-2576 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Vogtle Electric Generating Plant - Unit 1 BASH Large Break LOCA Evaluation Table 1-1 a - Summary of Changes/Errors (2012)

Estimated Description Effect

(~ PCn None affecting PCT* N/A Table 1-1b - Cumulative Impact of Changes/Errors

~IPCTI Descri ption (OF)

• Changes/Errors Previously Reported (Reference 1)* 0*

• Summary of Changes/Errors (2012) (Reference 2)* 0*

Cumulative Total 0

• On October 18, 2012, a Significant Change/Error Report for Vogtle was submitted (Reference 1). This "reset" the baseline PCT for reporting purposes.

There were no additional changes/errors in 2012 from those reported in Reference 1.

E2-1 to NL-13-2576 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Vogtle Electric Generating Plant - Unit 1 Appendix K Small Break LOCA Evaluation Table 1-1 c - Summary of Changes/Errors (2012)

Estimated Description Effect

(~ PCT)

None affecting PCT N/A Table 1-1d - Cumulative Impact of Changes/Errors

~IPCTI Description (OF)

• Changes/Errors Previously Reported (Reference 1) 0

• Changes/Errors 2012 Calendar Year (Reference 2) 0 Cumulative Total 0 E2-2 to NL-13-2576 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Vogtle Electric Generating Plant - Unit 2 BASH Large Break LOCA Evaluation Table 1-2a - Summary of Changes/Errors (2012)

Estimated Description Effect (f1 PCT)

None affecting pcr N/A Table 1-2b - Cumulative Impact of Changes/Errors f1IPCTI Description (OF)

• Changes/Errors Previously Reported (Reference 1)* 0*

• Summary of Changes/Errors (2012) (Reference 2)* 0*

Cumulative Total 0

• On October 18, 2012, a Significant Change/Error Report for Vogtle was submitted (Reference 1). This "resef' the baseline peT for reporting purposes.

There were no additional changes/errors in 2012 from those reported in Reference 1.

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. Enclosure 2 to NL-13-2576 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012 Vogtle Electric Generating Plant - Unit 2 Appendix K Small Break LOCA Evaluation Table 1-2c - Summary of Changes/Errors (2012)

Estimated Description Effect

(~ PCT)

None affecting PCT N/A Table 1-2d - Cumulative Impact of Changes/Errors

~IPCTI Descri ption (OF)

• Changes/Errors Previously Reported (Reference 1) 0

• Changes/Errors 2012 Calendar Year (Reference 2) 0 Cumulative Total 0 E2-4 to NL-13-2576 Vogtle Electric Generating Plant Units 1 and 2 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2012

References:

1. Letter from Mark J. Ajluni to USNRC (NL-12-1957), "Vogtle Electric Generating Plant 10 CFR 50.46 ECCS Evaluation Model Annual Report for 2011 and Significant Change/Error Report," dated October 18, 2012.

2. Westinghouse letter LTR-LlS-13-68, "A. W. Vogtle Units 1 and 210 CFR 50.46 Annual Notification and Reporting for 2012," dated March 1, 2013.

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