BVY 04-131, Vermont Yankee Nuclear Power Station Technical Specification Proposed Change No. 263 - Supplement No. 22 Extended Power Uprate - 10 CFR 50 Appendix R Timeline Verification

Vermont Yankee Nuclear Power Station Technical Specification Proposed Change No. 263 - Supplement No. 22 Extended Power Uprate - 10 CFR 50 Appendix R Timeline Verification

ML043510227
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	12/08/2004
From:	Thayer J Entergy Nuclear Operations, Entergy Nuclear Vermont Yankee
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BVY 04-131, TAC MC0761
Download: ML043510227 (3)

Text

- 'E Entergy Nuclear Vermont Yankee, LLC

-tml Entergy Entergy Nuclear Operations, Inc.

185 Old Ferry Road Brattleboro, VT 05302-0500 December 8, 2004 Docket No. 50-271 BVY 04-131 TAC No. MC0761 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Vermont Yankee Nuclear Power Station Technical Specification Proposed Change No. 263 - Supplement No. 22 Extended Power Uprate - 10 CFR 50 Appendix R Timeline Verification

Reference:

1) Entergy letter to U.S. Nuclear Regulatory Commission, "Vermont Yankee Nuclear Power Station, Technical Specification Proposed Change No. 263, Extended Power Uprate," BVY 03-80, September 10, 2003

2) Entergy letter to U.S. Nuclear Regulatory Commission, 'Vermont Yankee Nuclear Power Station, Technical Specification Proposed Change No. 263 -

Supplement No. 17, Extended Power Uprate - Response to Request for Additional Information related to the 10 CFR 50 Appendix R Timeline," BVY 04-107, September 30, 2004 As requested by the NRC staff, this letter provides additional information in support of the application (Reference 1) by Entergy Nuclear Vermont Yankee, LLC and Entergy Nuclear Operations, Inc. (Entergy) for a license amendment to increase the maximum authorized power level of the Vermont Yankee Nuclear Power Station (VYNPS) from 1593 megawatts thermal (MWt) to 1912 MWt.

Reference 2 provided a commitment to verify the time assumed in the Safe Shutdown Capability Analysis for a postulated Appendix R fire and complete operator training in the revised alternate shutdown procedure by December 1, 2004. Those commitments have been met.

All six operating crews were retrained and tested in their ability to safely shut down the plant in the event that the control room must be evacuated. The results of the length of time to place the reactor core isolation cooling (RCIC) system in service from the alternate shutdown panels are presented in Table 1 below. These actual times are realistically conservative in that they include time to reposition valves that may not need repositioning.

BVY 04-131 Docket No. 50-271 Page 2 of 3 Table I Operating Time to RCIC Initiation Crew (min:sec)

A 14:38 B 13:26 C 12:26 D 15:09 E 13:18 F 12:17 Average 13:32 Based on the results of this demonstration, the assumption in the Safe Shutdown Capability Analysis that the RCIC system can be made operable in approximately 15 minutes is confirmed. Therefore, sufficient margin exists to allow operator action to manually start the RCIC system prior to the reactor water level reaching the top of the active fuel.

This supplement to the license amendment request provides additional information to clarify Entergy's application for a license amendment and does not change the scope or conclusions in the original application, nor does it change Entergy's determination of no significant hazards consideration.

No new regulatory commitments are made in this submittal.

If you have any further questions or require additional information, please contact Mr. James M. DeVincentis at (802) 258-4236.

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

Executed on December A, 2004.

Sincerely, Jk/JVThayer Site Vice President Vermont Yankee Nuclear Power Station cc: (see next page)

. -6.

BVY 04-131 Docket No. 50-271 Page 3 of 3 cc: Mr. Richard B. Ennis, Project Manager Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Mail Stop 0 8 B1 Washington, DC 20555 Mr. Samuel J. Collins Regional Administrator, Region 1 U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406-1415 USNRC Resident Inspector Entergy Nuclear Vermont Yankee, LLC P.O. Box 157 Vernon, Vermont 05354 Mr. David O'Brien, Commissioner VT Department of Public Service 112 State Street - Drawer 20 Montpelier, Vermont 05620-2601