ML20115H186

Provides Revised Testing Plan for Scram Solenoid Pilot Valves at Plant

ML20115H186
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	07/17/1996
From:	Duffy J VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-96-90, NUDOCS 9607220256
Download: ML20115H186 (1)

Text

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VERMONT YANICEE t

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NUCLEAR POWER CORPORATION Ferry Road. Brattleboro. VT 05301-7002 l

s REPLY TO ENGINEERING OFFICE

$80 MAIN STREET BoLToN, MA 01740 (508) 779-6711 l

July 17,1996 BVY 96-90 l

United States Nuclear Regulatory Commi mion ATfN: Document Control Desk Washington, DC 20555

References:

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

(b) Letter, VYNPC to USNRL,"CRD SSPVs With Viton Internals, Vermont Yankee Response to BWROG Recommendations," BVY 96-40, dated March 25,1996

Subject:

Revised Test Plan for Scram Solenoid Pilot Valves at Vermont Yankee The purpose of tnis letter is to provide a revised testing plan for the scram solenoid pilot valves (SSPVs) at Vermont Yankee.

In Reference (b) Vermont Yankee committed to implementing the BWROG Regulatory Response Group (RRG) recommendations for testing of dual type ASCO SSPVs. On May 25,1996 and June 11,1996 Vermont Yankee replaced the SSPV exhaust valve diaphragms for all 89 control rods with new Viton l'

material. Following replacement and tes'ing, the core average 5% insertion time was 0.310 second.

Vermont Yankee will shutdown for refueling on September 6,1996. At that time we will implement a l

long-term solution to this problem. Therefore, our intention is to not perform additional single rod scraen testing for the balance of the current cycle.

We tmst that the information provided is acceptable; however, should you have any questions, please contact this office.

Sincerely, VERMONT YANKEE NUCLEAR POWER CORPORATION AH!r4 ames J. Duffy 9607220256 960717

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Licensing Engineer PDR ADOCK 05000271 P

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c: USNRC Region I Administrator USNRC Resident Inspector-VYNPS USNRC Project Manager-VYNPS