L-2016-154, Mitigating Strategies Assessment Report for the New Seismic Hazard Information in Accordance with EA-12-049

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Mitigating Strategies Assessment Report for the New Seismic Hazard Information in Accordance with EA-12-049
ML16251A068
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 08/25/2016
From: Costanzo C
Florida Power & Light Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
EA-12-049, L-2016-154
Download: ML16251A068 (2)
v • d • e


Text

AUG 2 5 2016 .. L-2016-154 10 CFR 50.54(f)

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  • NEI 12-0o~ R.evisiori 2. Appendix H:*H.4.1Path1: GMRS <ssE. Mitigating Strateg'ies Assessment CMSA) report for the New Seismic Hazard Information

References:

1. NEI 12-06; Rev-ision 2, .Di.verse *and Fle~ib!e* Coping,Strategies ('FLEX) :

Implementation Guide, December 2015,ADAMS Accession Niimber ML16005A675.* :. .. .. -.** *. '. :, *i * ; .. , *

2. JLD-ISG-2012-01, Revision 1, Compliance with Order EA-12-049, Order Modifying Licehs~s with Reg.arci to *Requirements fo.r Mitig~tion Strategies for Beyond-Design-Bas{s External Events,' February 2016, ADAMS Accession Number ML15357A163
3. PSL Letter L-2014-089, Florida Power & Light (FPL) Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident. Date: March 31, 2014, ADAMS A.cce~sio1fNumber ML14o99Al06- * * * *

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4. NRC Letter, St. Lucie Unit 1 and Unit 2 - Staff Assessment and Closure of Information provided Pui:suanttoTitle 10 of the, Code of Federal Regulations Part 50, Section 50;54(f); Seismic Hazard Reevatuatioils for Recommendation 2.1 of the Near-Term Task Force Review oflnsights from the Fukushima DAI-ICHI Accident,

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The purpose of this letter is.to' provide the results ofthe asses'sment for St. LuCie Unit 1 and Unit

~1 y.erforme,~.~.o :a9t~-~~i1~:ifih{()"LEJC'strategies developed, implemented and maintained in accordance'w'ith NRC Orde'rEA:.12-049, can be implemented, considering the impacts of the reevaluat~<,l seismic.4azard. The assessment was performed in accordance with the guidance pi:~wiae~Jrl.{\jJ.Bei:4~~H OfNJ~I 12-06 Revision 2 (Reference 1), which was endorsed by the NRG (~~-~e[~0~~~~)~ 1 ,, . : * *. , * .. .

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The Mitigating Strategies Seismic Hazard Information (MSSHI) is the St. Lucie's reevaluated seismic hazard information, developed using Probabilistic Seismic Hazard Analysis (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 Florida Power & Light Company 6501 S. Ocean Drive, Jensen Beach, FL 34957

St. Lucie Units 1 and 2 L-2016-154 Docket Nos. 50-335 and 50-389 Page 2 of2 family of seismic hazard curves at various frequencies and fractiles developed at the St. Lucie control point elevation. St. Lucie submitted the reevaluated seismic hazard information including the UHRS, GMRS and the hazard curves to the NRC on March 27, 2014 (Reference 3). The NRC Staff concluded that the St. Lucie GMRS adequately characterizes the reevaluated seismic hazard for the St. Lucie Nuclear Site (Reference 4).

Consistent with Section H.4.1 of Reference 1, the St. Lucie GMRS is bounded by the Safe Shutdown Earthquake (SSE) spectrum at all frequencies. Therefore, the FLEX strategies for St.

Lucie can be implemented as designed and no further seismic evaluations are necessary.

This letter contains no new regulatory commitments and no revisions to existing regulatory commitments.

Should you have any questions regarding this submittal, please contact Mr. Michael Snyder, St.

Lucie Licensing Manager, at 772-467-7036.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on AUG 2 5 2016 Sincerely, a~<<.u/_ &.shy Christopher R. Costanzo Site Vice President St. Lucie Nuclear Plant Enclosure cc: USNRC Regional Administrator, Region II USNRC Project Manager, St. Lucie Nuclear Plant USNRC Senior Resident Inspector, St. Lucie Nuclear Plant

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