BVY-99-130, Provides Clarification of Method for Determining MSIV Maximum & Minimum Pathway at Vermont Yankee Nuclear Power Station

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Provides Clarification of Method for Determining MSIV Maximum & Minimum Pathway at Vermont Yankee Nuclear Power Station
ML20217F589
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 10/08/1999
From: Wanczyk R
VERMONT YANKEE NUCLEAR POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-99-130, NUDOCS 9910210014
Download: ML20217F589 (1)


Text

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VERMONT YANKEE

. NUCLEAR POWER CORPORATION 185 Old Ferry Road, Brattleboro, VT 05301-7002 (802) 257 5271 October 8,1999 BVY 99-130 U.S. Nuclear Regulatory Commission ATrN: Document Control Desk .

Washington, DC 20555

References:

(a) Letter VYNPC to USNRC," Technical Specification Proposed Change No. 220, Main Steam Line Isolatior, Valve Leakage," BVY 99-83, dated June 29,1999 (b) Letter USNRC to VYNPC, " Vermont Yankee Nuclear Power Station - Issuance of Amendment Re: Main Steam Line Isolation Valve Leakage (TAC No.

MA6028)," NVY 99-91, dated October 1,1999

Subject:

Vermont Yankee Nuclear Power Station License No. DPR-28 (Docket No. 50-271)

Clarification of Method for Determining MSIV Maximum and Minimum Pathway Leakane at Vermont Yankee Nuclear Power Station Reference (a) proposed a change to Vermont Yankee's (VY) Technical Specifications concerning Main Steam Isolation Valve (MSIV) leakage requirements that was accepted in Reference (b). Reference (a) implied that MSIV " maximum" pathway results would be added to the calculation of" maximum" and

" minimum" pathway totals. This statement warrants some clarification to reflect our current practice.

VY's current practice is to add the " maximum" and " minimum" MSIV pathway leakage into the j respective " maximum" or " minimum" pathway totals. This approach is consistent with ANSI /ANS 56.8 -

1994 which is the standard used to determine these totals within VY's 10CFR50 Appendix J Program. It is VY's intent to continue our current practice.

j l

This clarification does not impact the determination that the change does not constitute a significant j hazards consideration and the evaluation previously submitted remains unchanged. Based on this, VY l requests that Reference (b) be updated to reflect this clarification.

Should you have any additional questions regarding the request, please contact Mr. Jim DeVincentis at (802)258-4236.

Sincerely, vERMo NKEE NUCLEAR POWER CORPORATION M W/

Robert J. Wa zy Director of S and Regulatory Affairs jD cc: . USNRC Region 1 Administrator USNRC Resident inspector- VYNPS USNRC Project Manager- VYNPS Vermont Department of Public Service

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