BVY-95-107, Transmits 60 Day Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gates Valves

Transmits 60 Day Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gates Valves

ML20093K107
Person / Time
Site:	Vermont Yankee
Issue date:	10/16/1995
From:	Reid D VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-95-107, GL-95-07, GL-95-7, NUDOCS 9510240096
Download: ML20093K107 (2)

Text

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g[4-1 YENMONTTANKEE "

0 NUCLEAR L POWER; CORPORATION l .-  % . Ferry Road, Brattleb'oro, VT 05301 7002 :

e.

g ENGINEERING OFFICE 580 MAIN STREET

]: .* BOLTON. MA 01740 (508) T/9-6711 3 October 16,1995 BVY 95-107.

i U.S. Nuclear Regulatory Commission

. ATTN: Document Control Desk-c  : Washington, DC 20555 i

L

References:

(a) License No. DPR-28 (Docket No. 50-271)

-(b)- NRC Generic Letter 95-07, NVY 95-110, dated August 17,1995 i

i

Subject:

Response to NRC Generic Letter 95-07, " Pressure Locking and Thermal

^

Binding of Safety Related Power-Operated Gate Valves" i

This letter transmits the 60-day required response of Reference (b). Vermont Yankee plans to implement the requested actions outlined in Reference (b) in accordance with i the 90-day and 180-day schedules provided in that Reference.

Vermont Yankee has completed a preliminary evaluation to identify safety-related L motor-operated gate valves that may be susceptible to pressure locking or thermal binding in response to' Generic Letter 89-10. As a result of this evaluation, six (6) r safety-related motor-operated gate valves were modified during the 1995 Refueling i Outage due to susceptibility to pressure locking. Additionally, operating procedures were revised due to thermal binding concerns for one safety-related motor-operated

~ gate valve. This evaluation is currently being reviewed to ensure it meets the intent of the ~ screening evaluation required by Reference (b). This evaluation and any

! required operability' evaluation will be completed in accordance with the schedule

. provided in Reference (b).

[

Vermont: Yankee is also performing a screening evaluation on other safety related i- power-operated (i.e. alr-operated and hydraulically-operated) gate valves to identify any ithat may. be potentially susceptible to pressure locking or thermal binding. This evaluation and any required operability evaluation will be complued in accordance

. with the schedule provided in Reference (b).

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~

. Vermont Yankee will be following industry developments and working with the BWROG

~

- on this issue, in addition, Vermont Yankee will attend the meeting announced by the

_ "NRC for November 2,' 1995 to discuss Generic Letter 95-07.-

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4 0.S. Nucirr Regulit:ry Commission VERMONT YANKEE NUCLEAR POWER CORPORATION

" October 16,1995

,' Page 2. , ,

We trust that the information provided is satisfactory; however, should you have any questions or desire additional information, please do not hesitate to contact us.

Sincerely, Vermont Yankee Nuclear Power Corporation Donald A. Reid Vice President, Operations cc: USNRC Regional Administrator, Region 1 USNRC Resident inspector, VYNPS 4 % bSIM)gy, ,.

USNRC Project Manager, VYNPS g

[9  % W-NOTAfiY g h I

STATE OF VERMONT )

)ss g/ pyBUC p.f WINDHAM COUNTY ) g0 /

Then personally appeared before me, Donald A. Reid, who, being duly a state that hepN resident.

Operations, of Vermont Yankee Nuclear Power Corporation,' that he is duly authoriz ,--"8f =d M foregoing document in the nante and on the behalf of Vermont Yankee Nuclear Power Corporation, dst nts therein are true to the best of his knowledge and belief.

M Sally A. Sindstrutn, Notary Public My Commission expires February 10,1999