ML16274A438
| ML16274A438 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 10/12/2016 |
| From: | Frankie Vega Japan Lessons-Learned Division |
| To: | Nazar M Florida Power & Light Co |
| Vega F, NRR/JLD, 415-1617 | |
| References | |
| CAC MF3940, CAC MF3941 | |
| Download: ML16274A438 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Mano Nazar President and Chief Nuclear Officer Nuclear Division Florida Power and Light Company Mail Stop NT3/JW 15430 Endeavor Drive Juno Beach, FL 33478 October 12, 2016
SUBJECT:
ST. LUCIE PLANT, UNITS 1AND2-STAFF REVIEW OF MITIGATION STRATEGIES ASSESSMENT REPORT OF THE IMPACT OF THE REEVALUATED SEISMIC HAZARD DEVELOPED IN RESPONSE TO THE MARCH 12, 2012, 50.54(f) LETTER (CAC NOS. MF3940 AND MF3941)
Dear Mr. Nazar:
The purpose of this letter is to provide the U.S. Nuclear Regulatory Commission's (NRC) assessment of the seismic hazard mitigation strategies assessment (MSA), as described in an August 25, 2016, letter (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML16251A068), submitted by Florida Power and Light Company (FPL, the licensee) for St. Lucie Plant, Units 1 and 2 (St. Lucie). The MSA confirms that the licensee has adequately addressed the reevaluated seismic hazard within its mitigating strategies for beyond-design-basis external events.
BACKGROUND By letter dated March 12, 2012 (ADAMS Accession No. ML12053A340), the NRC issued a request for information pursuant to Title 10 of the Code of Federal Regulations (10 CFR),
Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The 50.54(f) letter was issued as part of implementing lessons learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 1 to the 50.54(f) letter requested licensees reevaluate the seismic hazard using present-day methodologies and guidance. Concurrent with the reevaluation of seismic hazards, the NRC issued Order EA-12-049, "Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events" (ADAMS Accession No. ML12054A736). The order requires holders of operating power reactor licenses and construction permits issued under 1 O CFR Part 50 to develop, implement, and maintain guidance and strategies to maintain or restore core cooling, containment, and spent fuel pool cooling following a beyond-design-basis external event.
By "L-2014-089, Florida Power & Light (FPL) Seismic Hazard & Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to [[CFR" contains a listed "[" character as part of the property label and has therefore been classified as invalid. Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Acc|letter dated March 31, 2014]] (ADAMS Accession No. ML14099A106), the licensee provided its reevaluated seismic hazard for St. Lucie in response to the 50.54(f) letter.
On December 10, 2015 (ADAMS Accession No. ML16005A621), the Nuclear Energy Institute (NEI) submitted Revision 2 to NEI 12-06, including guidance for MSAs regarding reevaluated hazard information. The NRC subsequently endorsed NEI 12-06, Revision 2, with exceptions, clarifications, and additions, in Japan Lessons-Learned Division (JLD) interim staff guidance (ISG) 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" (ADAMS Accession No. ML15357A163).
MITIGATION STRATEGIES ASSESSMENT By letter dated January 7, 2016 (ADAMS Accession No. ML15352A053}, the NRC staff documented its review of the licensee's reevaluated seismic hazard, also referred to as the mitigating strategies seismic hazard information. The staff confirmed the licensee's conclusion that its reevaluated seismic hazard is bounded by the current design-basis at all frequencies above 1 Hertz. In addition, the staff concluded that the Ground Motion Response Spectrum determined by the licensee adequately characterizes the reevaluated seismic hazard for the St.
Lucie site.
Appendix Hof NEI 12-06, Revision 2, describes acceptable methods for demonstrating that the reevaluated seismic hazard is addressed within the St. Lucie mitigating strategies for beyond-design-basis external events. The licensee stated that the St. Lucie MSA was performed consistent with NEI 12-06, Revision 2. The NRC staff confirmed that the licensee's seismic hazard MSA is consistent with the guidance in Appendix H.4.1 of NEI 12-06, Revision 2, as endorsed by JLD-ISG-2012-01, Revision 1. Therefore, the methodology used by the licensee is appropriate to perform an assessment of the mitigation strategies that addresses the reevaluated seismic hazard.
The NRC staff has reviewed the seismic hazard MSA for St. Lucie. The NRC staff concludes that sufficient information has been provided to demonstrate that the licensee's plans for the development and implementation of guidance and strategies under Order EA-12-049 appropriately address the reevaluated seismic hazard information stemming from the 50.54(f) letter.
If you have any questions, please contact me at (301) 415-1617 or via e-mail at Frankie.Vega@nrc.gov.
Docket Nos. 50-335 and 50-389 cc : Distribution via Listserv Sinre:ffd_
Frankie Vega, Z:: Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation
ML16274A438 Sincerely, IRA/
Frankie Vega, Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation FVega, NRR BTitus, NRR EBowman, NRR GBowman, NRR
- via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRR/JLD/JHMB/BC(A)
NRR/JLD/JHMB/PM NAME FVega Slent GBowman FVega DATE 10/11/2016 10/11/2016 10/12/2016 10/12/2016