NL-16-0622, NEI 12-06, Rev. 2, Appendix H.4.1 Path 1:GMRS SSE, Mitigating Strategies Assessment (MSA) Report

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NEI 12-06, Rev. 2, Appendix H.4.1 Path 1:GMRS SSE, Mitigating Strategies Assessment (MSA) Report
ML16118A488
Person / Time
Site: Farley  Southern Nuclear icon.png
Issue date: 04/27/2016
From: Pierce C
Southern Co, Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-16-0622
Download: ML16118A488 (3)
v • d • e


Text

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

40 Inverness Center Parkway Post Office Box 1295 Birmingham , AL 35242 Tel 205.992.7872 SOUTHERN << \

Fax 205.992.7601 NUCL EAR A SOUTHERN COMPANY APR 2 7 2016 Docket Nos.: 50-348 NL-16-0622 50-364 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Joseph M. Farley Nuclear Plant - Units 1 and 2 NEI12-06 , Rev. 2, Appendix H.4.1 Path 1: GMRS s SSE Mitigating Strategies Assessment (MSA) Report

References:

1. NEI 12-06, Revision 2, Diverse and Flexible Coping Strategies (FLEX) Implementation Guide, December 2015, ML16005A625.
2. JLD-ISG-2012-01, Revision 1, Compliance with Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events, February 2016, ML15357A163.
3. Letter to NRC, Joseph M. Farley Nuclear Plant- Units 1 and 2 Seismic Hazard and Screening Report for CEUS Sites, March 31, 2014, NL-14-0342, ML14092A020.
4. NRC Letter, Joseph M. Farley Nuclear Plant Units 1 and 2- Staff Assessment of Information provided Pursuant to 10 CFR 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 of the NTTF Review of Insights from the Fukushima Dai-ichi Accident, dated October 16, 2015, ML15287A092.
5. NRC Letter, Joseph M. Farley Nuclear Plant, Units 1 and 2- Staff Closure of Request for Information Pursuant to 10 CFR 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 "Seismic" of the NTTF Review of Insights from the Fukushima Dai-ichi Accident, February 4, 2016, ML16029A051.

Ladies and Gentlemen:

The purpose of this letter is to provide the results of the assessment for the Joseph M. Farley Nuclear Plant, Units 1 and 2 (FNP) to determine if the FLEX strategies developed, implemented and maintained in accordance with NRC Order EA-12-049 can be implemented considering the impacts of the reevaluated seismic hazard. The assessment was performed in accordance with the guidance provided in Appendix H of NEI 12-06 Revision 2 (Reference 1) which was endorsed by the NRC (Reference 2).

The Mitigating Strategies Seismic Hazard Information (MSSHI) is the licensee's reevaluated seismic hazard information at FNP, developed using Probabilistic Seismic Hazard Analysis

U.S. Nuclear Regulatory Commission NL-16-0622 Page2 (PSHA). The MSSHI includes a performance-based Ground Motion Response Spectrum (GMRS), Uniform Hazard Response Spectra (UHRS) at various annual probabilities of exceedance, and a family of seismic hazard curves at various frequencies and fractiles developed at the FNP control point elevation. FNP submitted the reevaluated seismic hazard information including the UHRS, GMRS and the hazard curves to the NRC on March 31, 2014 (Reference 3) The NRC staff concluded that the GMRS that was submitted adequately characterizes the reevaluated seismic hazard for the FNP site (References 4 and 5).

Consistent with NEI12-06 , Revision 2, Appendix H.4.1, FNP is bounded by (or with negligible GMRS exceedance) the SSE spectrum at frequencies 1 Hz and greater. Therefore, the FLEX strategies for FNP can be implemented as designed and no further seismic evaluations are necessary.

This letter contains no new NRC commitments. If you have any questions, please contact John Giddens at 205.992.7924.

Mr. C. R. Pierce states he is the Regulatory Affairs Director of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and, to the best of his knowledge and belief, the facts set forth in this letter are true.

Respectfully ~itted, tt?.~

C. R. Pierce Regulatory Affairs Director CRP/JMG/MRE

~

Sworn to and subscribed before me this d..1:_ day of A/R.-1 L- , 2016.

Noo:u~O(~~

My commission expires: / D - "3 -.)..o l 'I

U. S. Nuclear Regulatory Commission NL-16-0622 Page 3 cc: Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bast, Executive Vice President & Chief Nuclear Officer Ms. C. A. Gayheart, Vice President - Farley Mr. M. D. Meier, Vice Presiden t- Regulatory Affairs Mr. B. J. Adams, Vice Presiden t- Engineering Mr. D. R. Madison, Vice Presiden t- Fleet Operations Ms. B. L. Taylor, Regulatory Affairs Manage r- Farley RType: CFA04.054 U.S. Nuclear Regulatorv Commission Ms. C. Haney, Regional Administrator Mr. S. A. Williams, NRR Senior Project Manager - Farley Mr. P. K. Niebaum, Senior Resident Inspecto r- Farley Alabama Department of Public Health Dr. T. M. Miller, MD, State Health Officer

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

40 Inverness Center Parkway Post Office Box 1295 Birmingham , AL 35242 Tel 205.992.7872 SOUTHERN << \

Fax 205.992.7601 NUCL EAR A SOUTHERN COMPANY APR 2 7 2016 Docket Nos.: 50-348 NL-16-0622 50-364 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Joseph M. Farley Nuclear Plant - Units 1 and 2 NEI12-06 , Rev. 2, Appendix H.4.1 Path 1: GMRS s SSE Mitigating Strategies Assessment (MSA) Report

References:

1. NEI 12-06, Revision 2, Diverse and Flexible Coping Strategies (FLEX) Implementation Guide, December 2015, ML16005A625.
2. JLD-ISG-2012-01, Revision 1, Compliance with Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events, February 2016, ML15357A163.
3. Letter to NRC, Joseph M. Farley Nuclear Plant- Units 1 and 2 Seismic Hazard and Screening Report for CEUS Sites, March 31, 2014, NL-14-0342, ML14092A020.
4. NRC Letter, Joseph M. Farley Nuclear Plant Units 1 and 2- Staff Assessment of Information provided Pursuant to 10 CFR 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 of the NTTF Review of Insights from the Fukushima Dai-ichi Accident, dated October 16, 2015, ML15287A092.
5. NRC Letter, Joseph M. Farley Nuclear Plant, Units 1 and 2- Staff Closure of Request for Information Pursuant to 10 CFR 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 "Seismic" of the NTTF Review of Insights from the Fukushima Dai-ichi Accident, February 4, 2016, ML16029A051.

Ladies and Gentlemen:

The purpose of this letter is to provide the results of the assessment for the Joseph M. Farley Nuclear Plant, Units 1 and 2 (FNP) to determine if the FLEX strategies developed, implemented and maintained in accordance with NRC Order EA-12-049 can be implemented considering the impacts of the reevaluated seismic hazard. The assessment was performed in accordance with the guidance provided in Appendix H of NEI 12-06 Revision 2 (Reference 1) which was endorsed by the NRC (Reference 2).

The Mitigating Strategies Seismic Hazard Information (MSSHI) is the licensee's reevaluated seismic hazard information at FNP, developed using Probabilistic Seismic Hazard Analysis

U.S. Nuclear Regulatory Commission NL-16-0622 Page2 (PSHA). The MSSHI includes a performance-based Ground Motion Response Spectrum (GMRS), Uniform Hazard Response Spectra (UHRS) at various annual probabilities of exceedance, and a family of seismic hazard curves at various frequencies and fractiles developed at the FNP control point elevation. FNP submitted the reevaluated seismic hazard information including the UHRS, GMRS and the hazard curves to the NRC on March 31, 2014 (Reference 3) The NRC staff concluded that the GMRS that was submitted adequately characterizes the reevaluated seismic hazard for the FNP site (References 4 and 5).

Consistent with NEI12-06 , Revision 2, Appendix H.4.1, FNP is bounded by (or with negligible GMRS exceedance) the SSE spectrum at frequencies 1 Hz and greater. Therefore, the FLEX strategies for FNP can be implemented as designed and no further seismic evaluations are necessary.

This letter contains no new NRC commitments. If you have any questions, please contact John Giddens at 205.992.7924.

Mr. C. R. Pierce states he is the Regulatory Affairs Director of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and, to the best of his knowledge and belief, the facts set forth in this letter are true.

Respectfully ~itted, tt?.~

C. R. Pierce Regulatory Affairs Director CRP/JMG/MRE

~

Sworn to and subscribed before me this d..1:_ day of A/R.-1 L- , 2016.

Noo:u~O(~~

My commission expires: / D - "3 -.)..o l 'I

U. S. Nuclear Regulatory Commission NL-16-0622 Page 3 cc: Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bast, Executive Vice President & Chief Nuclear Officer Ms. C. A. Gayheart, Vice President - Farley Mr. M. D. Meier, Vice Presiden t- Regulatory Affairs Mr. B. J. Adams, Vice Presiden t- Engineering Mr. D. R. Madison, Vice Presiden t- Fleet Operations Ms. B. L. Taylor, Regulatory Affairs Manage r- Farley RType: CFA04.054 U.S. Nuclear Regulatorv Commission Ms. C. Haney, Regional Administrator Mr. S. A. Williams, NRR Senior Project Manager - Farley Mr. P. K. Niebaum, Senior Resident Inspecto r- Farley Alabama Department of Public Health Dr. T. M. Miller, MD, State Health Officer

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