NRC 2009-0121, Transmittal of Information to Support License Amendment Request 241 Pbnp Vnpab and CREFS Seismic Evaluation

Transmittal of Information to Support License Amendment Request 241 Pbnp Vnpab and CREFS Seismic Evaluation

ML093310308
Person / Time
Site:	Point Beach
Issue date:	11/20/2009
From:	Meyer L Point Beach
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NRC 2009-0121
Download: ML093310308 (2)

Text

NExTera T ENERGY" POINT BEACH November 20, 2009 NRC 2009-0121 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Point Beach Nuclear Plant, Units 1 and 2 Dockets 50-266 and 50-301 Renewed License Nos. DPR-24 and DPR-27 Transmittal of Information to Support License Amendment Request 241 PBNP VNPAB and CREFS Seismic Evaluation

References:

(1) FPL Energy Point Beach, LLC letter to NRC, dated December 8, 2008, Submittal of License Amendment Request 241, Alternative Source Term (ML083450683)

(2) NextEra Energy Point Beach, LLC letter to NRC, dated September 10, 2009, License Amendment Request 241, Alternative Source Term, Commitment for Seismic Evaluation (ML092540146)

To support NRC review of the Point Beach Nuclear Plant (PBNP) License Amendment Request (LAR) 241 (Reference 1) for Alternative Source Term (AST), NextEra Energy Point Beach, LLC (NextEra) is providing "S&A Report No. 09Q0839-R-001, PBNP VNPAB and CREFS Seismic Verification," dated November 12, 2009.

The report was prepared by Stevenson & Associates for PBNP and provides the seismic verification study required for the ventilation systems credited in the PBNP AST analyses.

During the review of LAR 241 (Reference 1), the NRC staff expressed concern regarding the seismic adequacy of the control room emergency filtration system (CREFS) and primary auxiliary building ventilation system (VNPAB) credited in the PBNP AST analyses. Via Reference (2), NextEra committed to evaluate the seismic adequacy of CREFS and VNPAB.

The evaluation methodology is consistent with the approach used for the Edwin I. Hatch Nuclear Plant to provide reasonable assurance that the credited post-accident ventilation systems would operate and retain pressure integrity during and following a seismic event. Accordingly, this letter provides the results of that evaluation.

NextEra Energy Point Beach, LLC, 6610 Nuclear Road, Two Rivers, Wl 54241

Document Control Desk Page 2 Summary of Regqulatory Commitments The enclosure to this letter is being provided to the NRC in accordance with the commitment cited in Reference (2), which states:

"A seismic adequacy review of ventilation systems credited in the AST analyses will be conducted in accordance with the guidelines provided in the Seismic Qualification Utility Group (SQUG) Generic Implementation Procedure for Seismic Verification of Nuclear Plant Equipment, Revision 2, as corrected on February 14, 1992, and in the December 2006, Electric Power Research Institute (EPRI) Final Report 1014608, "Seismic Evaluation Guidelines for HVAC Duct and Damper Systems: Revision to 1007896," as applicable. This seismic verification review, including independent peer review, will be conducted on the Point Beach Units 1 and 2 CREFS and exhaust portion of the VNPAB system credited in the AST analyses and the associated seismic verification report will be provided to the NRC within 30 days of completion. Any required modifications identified by the review will be completed as part of implementation of the AST modifications."

The enclosed report addresses the commitment to perform a seismic adequacy review of the ventilation systems credited in the PBNP AST analyses. The recommended ventilation system upgrades identified in the report will be completed as part of the implementation of the AST modifications as previously committed in Reference (2).

The information contained in this letter does not alter the no significant hazards consideration contained in Reference (1) and continues to satisfy the criteria of 10 CFR 51.22 for categorical exclusion from the requirements for an environmental assessment.

In accordance with 10 CFR 50.91, a copy of this letter is being provided to the designated Wisconsin Official.

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

Executed on November 20, 2009.

Very truly yours, NextEra Energy Point Beach, LLC rLarry eyer Site Vice President Enclosure cc: Administrator, Region Ill, USNRC Project Manager, Point Beach Nuclear Plant, USNRC Resident Inspector, Point Beach Nuclear Plant, USNRC PSCW