ML14171A095

Schedule for Response to Request for Information (RAI) Regarding Fukushima Lessons Learned Flooding Hazard Reevaluation Report

ML14171A095
Person / Time
Site:	North Anna
Issue date:	06/16/2014
From:	Mark D. Sartain Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
14-273
Download: ML14171A095 (4)

Text

0 - I*- I VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 June 16, 2014 U. S. Nuclear Regulatory Commission Serial No.: 14-273 Attention: Document Control Desk NLOS/ETS: RO Washington, DC 20555-0001 Docket Nos.: 50-338/339 License Nos.: NPF-4/7 VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS I AND 2 SCHEDULE FOR RESPONSE TO REQUEST FOR INFORMATION (RAI)

REGARDING FUKUSHIMA LESSONS LEARNED FLOODING HAZARD REEVALUATION REPORT By letters dated March 11, 2013 (Serial No.13-017) and March 31, 2014 (Serial No.14-133), Virginia Electric and Power Company (Dominion) submitted a flooding hazard reevaluation report and seismic hazard and screening report, respectively. The seismic hazard and screening report indicates that the ground motion response spectrum (GMRS) exceeds the safe shutdown earthquake for North Anna.

Based on this conclusion, the NRC requested additional information to complete the review of the flooding hazard reevaluation of the North Anna site.

A new, detailed seismic evaluation of the North Anna service water reservoir (SWR) is required to provide justification for the seismic capability of the service water impoundment under the updated seismic hazard (submitted in the March 31, 2014 letter) to respond to the NRC's request for additional information (RAI). A seismic evaluation of the SWR is in progress and currently scheduled for completion in the fourth quarter of 2014 to support the seismic probabilistic risk assessment (PRA) for NTTF Recommendation 2.1: Seismic. Accordingly, Dominion intends to provide a response to the NRC RAI by November 15, 2014. A milestone schedule supporting this timeline is included in the attachment to this letter.

Should you have any questions or require additional information, please contact Mr. Thomas Shaub at (804) 273-2763.

Respectfully, Mark Sartain Vice President - Nuclear Engineering Commitment contained in this letter: Provide final response to RAI 3.4-1 by November 15, 2014.

COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Mr. Mark D. Sartain, who is Vice President - Nuclear Engineering, of Virginia Electric and Power Company. He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that company, and that the statements in the document are true to the best of his knowledge and belief.

Acknowledged before me this IL' day of "L.'., 2014.

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Serial No.14-273 Docket Nos. 50-338/339 Page 2 of 2

Attachment:

Schedule for Response to Request for Information (RAI) Regarding Fukushima Lessons Learned Flooding Hazard Reevaluation Report cc: U.S. Nuclear Regulatory Commission - Region II Marquis One Tower 245 Peachtree Center Avenue, NE Suite 1200 Atlanta, GA 30303-1257 Dr. V. Sreenivas NRC Project Manager North Anna U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 G-9A 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector North Anna Power Station

Serial No.14-273 Docket Nos. 50-338/339 Attachment Schedule for Response to Request for Information (RAI)

Regarding Fukushima Lessons Learned Flooding Hazard Reevaluation Report Virginia Electric and Power Company North Anna Power Station Units 1 And 2

Serial No.14-273 Docket Nos. 50-338/339 Schedule for Response to NTTF 2.1 Flooding RAI Attachment Page 1 of 1 Response to Supplemental RAI 3.4-1 Service Water Reservoir (SWR) Seismic Evaluation Major Activities and Estimated Durations Milestone Schedule Activity Estimated Duration Target Date Identify, retrieve and review SWR construction records, previous analyses, and soil boring 2 - 4 weeks June 30, 2014 data Develop soil profile at SWR 2 weeks July 15, 2014 Develop GMRS-consistent seismic input 4 weeks August 15, 2014 motions at SWR Identify maximum ground acceleration and corresponding earthquake magnitude for input 2 weeks August 31, 2014 to the soil failure analysis Perform and document slope stability and 4 weeks September 30, 2014 liquefaction analysis for SWR Review and approve vendor soil failure 2 weeks October 15, 2014 analysis report Develop, review and approve response to 4 weeks November 15, 2014 Supplemental RAI 3.4-1