ML13044A113

Watts Bar Nuclear Plant, Unit 2, Fire Protection Program (TAC No. ME0853) - Commitment to Provide Additional Information on Multiple Spurious Operation (MSO) Scenarios

ML13044A113
Person / Time
Site:	Watts Bar
Issue date:	02/07/2013
From:	Hruby R A Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC ME0853
Download: ML13044A113 (3)

Text

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000February 7, 201310 CFR 50.4U.S. Nuclear Regulatory CommissionATTN: Document Control DeskWashington, D.C. 20555-0001Watts Bar Nuclear Plant, Unit 2NRC Docket No.50-391Subject: WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 -FIRE PROTECTIONPROGRAM (TAC NO. ME0853) -COMMITMENT TO PROVIDE ADDITIONALINFORMATION ON MULTIPLE SPURIOUS OPERATION (MSO) SCENARIOSReferences: 1. TVA letter dated July 16, 2010, "Watts Bar Nuclear Plant, Unit 2 -Requestfor Additional Information Regarding Fire Protection Program (TAC No.ME0853)"2. TVA letter dated August 20, 2010, "Watts Bar Nuclear Plant, Unit 2 -FireProtection Program (TAC No. ME0853) -Commitment to Provide AdditionalInformation on Multiple Spurious Operation (MSO) Scenarios"3. TVA letter dated April 26, 2012, "Watts Bar Nuclear Plant (WBN) Unit 2 -Transmittal of Revised Unit 1/Unit 2 As-Designed Fire Protection Report(TAC No. ME3091)"4. TVA letter dated May 30, 2012, "Watts Bar Nuclear Plant (WBN) Unit 2 -Response to Request for Additional Information (RAI) (TAC No. ME3091)"The following commitment was made by TVA in Reference 1:"Table 1 provides a description of the dual unit MSO scenarios identified by the abovedescribed analysis. TVA will provide a description of how safe shutdown is ensured foreach scenario by August 20, 2010."TVA fulfilled this commitment by the submittal of Revision 0 of the WBN Unit 2 MultipleSpurious Operation Evaluation, Report R1 976-20-01, dated August 2010, via Reference 2 andmade the following commitment:

U.S. Nuclear Regulatory CommissionPage 2February 7, 2013"The resolutions contained in Appendix B of the MSO Evaluation Report shall beimplemented prior to Unit 2 fuel load."One purpose of this letter is to provide Revision 2 of Report R1 976-20-01. The updated reportis provided in Enclosure 1, and a summary of the changes to the report is provided inEnclosure 2.The commitment made in Reference 2 (listed above) regarding the resolutions contained inAppendix B of the MSO Evaluation Report remains valid, and it is TVA's intent to confirm thefulfillment of the commitment as part of the submittal of the as-constructed version of thedual-unit Fire Protection Report (FPR). TVA's commitment for the submittal of the as-constructed FPR was made in Reference 3.The second purpose of this letter is to provide an update to the list of Fire Protectioncommitments previously submitted via Reference 4. Provided in Enclosure 3 is an updatedversion of the list provided in Reference 4 which identifies only the outstanding long-termcommitments. This list reflects the wording of each commitment as it was submitted to NRC.However, for this group of commitments, completion of each commitment is required for thedevelopment of the as-constructed FPR which TVA committed to provide by October 15, 2014,in Reference 3.The new regulatory commitment made in this letter is listed in Enclosure 4. If you have anyquestions, please contact Gordon Arent at (423) 365-2004.I declare under penalty of perjury that the foregoing is true and correct. Executed on the7th day of February, 2013.Respectfully,Raymond A. Hruby, Jr.General Manager, Technical ServicesWatts Bar Unit 2Enclosures:1. WBN Unit 2 Multiple Spurious Operation Evaluation, Report R1976-20-01, datedJanuary 20132. Summary of Changes made to WBN Unit 2 Multiple Spurious Operation Evaluation,Report R1976-20-01, dated January 20133. Fire Protection Commitments4. Commitment List U.S. Nuclear Regulatory CommissionPage 3February 7, 2013cc (Enclosures):U. S. Nuclear Regulatory CommissionRegion IIMarquis One Tower245 Peachtree Center Ave., NE Suite 1200Atlanta, Georgia 30303-1257NRC Resident Inspector Unit 2Watts Bar Nuclear Plant1260 Nuclear Plant RoadSpring City, Tennessee 37381