ML16314D426
| ML16314D426 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/07/2016 |
| From: | Mccartney E NextEra Energy Seabrook |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| SBK-L-16175 | |
| Download: ML16314D426 (3) | |
Text
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Seabrook Station NEXTera ENERGYe SEABROOK November 7, 2016 SBK-L-16175 Docket No. 50-443 Response to NRC 10 CFR 50.54(f) Request for Information Regarding Near-Term Task Force Recommendation 2.1, Flooding - Submittal of Flooding Hazards Reevaluation Report
References:
- 1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review oflnsights from the Fukushima Dai-ichi Accident," March 12, 2012 (ML12053A340)
- 2. NRC Letter, "Prioritization of Response Due Dates for Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Flooding Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Review oflnsights from the Fukushima Dai-ichi Accident," May 11, 2012 (ML12097A509)
- 3. NRC Letter, "Supplemental Information Related to Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Flooding Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Review oflnsights from the Fukushima Dai-ichi Accident," March 1, 2013 (ML13044A561)
- 4. NextEra Energy Seabrook letter SBK-L-15039 to U.S. Nuclear Regulatory Commission, "Extension Request Regarding the Flooding Hazard Reevaluation Report Required by NRC Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f)
Regarding Recommendation 2.1, Flooding of the Near-Term Task Force Review oflnsights from the Fukushima Dai-ichi Accident," March 6, 2015, (ML15070A545)
NextEra Energy Seabrook, LLC, P.O. Box 300, Lafayette Road, Seabrook, NH 03874
U.S. Nuclear Regulatory Commission SBK-L-16175/Page 2
- 5. NRC Letter, "Relaxation of Response Due Dates Regarding Flooding Hazard Reevalutions for Recommendation 2.1 of the Near-Term Task Force Review of the Insights from the Fukushima Dai-ichi Accident, April 27, 2015 (ML15103A469)
- 6. NextEra Energy Seabrook letter SBK-L-15181 to U.S. Nuclear Regulatory Commission, "Response to NRC 10 CFR 50.54(f) Request for Information Regarding Near-Term Task Force Recommendation 2.1, Flooding - Submittal of Flooding Hazards Reevaluation Report,"
September 25, 2015, (ML15274A210)
On March 12, 2012, the Nuclear Regulatory Commission (NRC) staff issued Reference 1 to all NRC power reactor licensees and holders of construction permits in active or deferred status. of Reference 1 contains specific requested actions, requested information, and required responses associated with Near-Term Task Force (NTTF) Recommendation 2.1 for flooding hazards. Enclosure 2 of Reference 1 directed reevaluation of flooding hazards at sites and indicated that a Hazard Reevaluation Report (HRR) would be due within one to three years from the date of the Reference 1 letter. On May 11, 2012, the NRC issued the Reference 2 letter that contained the NRC's prioritization plan and due dates for licensees to submit HRRs.
Seabrook Station Unit 1, operated by NextEra Energy Seabrook, LLC (NextEra), was identified as a Category 3 site in Reference 2 and was required to submit its HRR by March 12, 2015.
In Reference 3, the NRC provided supplemental information that states incomplete HRRs that only contain an analysis of some flooding hazard mechanisms would not be of substantive benefit for staff review and would not be acceptable. Therefore, Reference 3 recommends that licensees not submit partial reports, but instead submit an extension request. In Reference 4, NextEra requested an extension of the March 12, 2015 due date for submittal of the HRR. In Reference 5, the NRC revised the required response date for submitting the HRR to September 30, 2015. The Reference 6 letter submitted the flooding HRR to NRC.
During subsequent discussions with NRC Staff on the contents of the HRR, Seabrook agreed to perform an additional flooding case for the Probable Maximum Storm Surge (PMSS) event to see the effects that additional standing water, an increase in significant wave height, and a shorter wave period would have on wave overtopping. Since these resultant PMSS flooding elevations are greater than those presented in the original Seabrook flooding HRR (Reference 6), a revision to the flooding HRR and resubmittal to the NRC is required.
Accordingly, the enclosure to this letter provides Revision 1 of the Seabrook flooding HRR.
This letter contains no new regulatory commitments and there are no changes to the Seabrook flooding interim actions previously identified in Reference 6.
Should you have any questions concerning this submittal, please contact Mr. Kenneth Browne, Licensing Manager, at (603) 773-7932.
U.S. Nuclear Regulatory Commission SBK-L-16175/Page 3 I declare under penalty of perjury that the foregoing is true and correct.
Executed on November
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,2016.
Sincerely, NextEra Energy Seabrook, LLC
~~rtney 7J Site Vice President Enclosure cc:
D. Dorman, NRC Region I Administrator J. Poole, NRC Project Manager, Project Directorate 1-2 P. Cataldo, NRC Senior Resident Inspector Director, Office of Nuclear Reactor Regulation Mr. Eric E. Bowman, NRR/JLD/PPSD/HMB Mr. Perry Plummer Director Homeland Security and Emergency Management New Hampshire Department of Safety Division of Homeland Security and Emergency Management Bureau of Emergency Management 33 Hazen Drive Concord, NH 03305 Mr. John Giarrusso, Jr., Nuclear Preparedness Manager The Commonwealth of Massachusetts Emergency Management Agency 400 Worcester Road Framingham, MA 01702-5399