ML20086H190

AO 50-271/72-14:on 821204,during Core Spray Sys Surveillance,Reactor Pressure Switch Ps 2-3-52B Actuated at Less than 335 Psig.Switch Immediately Reset & Verified

ML20086H190
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	12/04/1972
From:	Rosalyn Jones VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-50-271-72-14, VYV-2356, NUDOCS 8401160051
Download: ML20086H190 (1)

Text

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' VERhiONT YANKEE NUCLEAR POWER CORPORATION SCVcNTY OCVcH OMOVE OTitCCT Rurt. Ann. VtmMONT 05701 sitPLY tos P. O. DOX 187 VYve2356 VERNON. VERMONT 05354

" .. Deccaber 4, 1972

+-

United States Atomic EnerEy Comission Directorate of Regulatory Operations, Region I 970 Broad Street ..

Newark, New Jersey 07102 l

REFERENCE:

Operating License DPR-28 i

Docket No. 50-271 Abnormal Occurrence No. A0-72-14 Gentlenent l An defined by Technical Spectfications for the Vermont Yankee

) Nuelcar Power Station, Section 6.7.A.c, we are reporting the following Abnormal Occurrence as A0-72-14 and conffreing our telephone converaction with your office.

At approximately 1015 on the corning of Deccaber 4 while perforning routino surveillance on the Core Spray System, the Reactor Pressure Switch (RilR/ Core Spray Pernisoive) designated pS 2-3-523 actuated at a pressure

<335 pufn, This constitutco a violation of Technical Specifications, Tablo 3.2.1, which specifles a value of 350 -l- 15 poig, and requires two operable inntrunent channela per trip system. The nyate:n vould have operated, if required, due to the one out of two logic employed. The reactor who operating at a power level of approximately 65% at the time of this occurrence. "

The switch van irnediately recet, functionally tested, and verified to be operable within the tolerance npecified. This renedial action van completed in a tino span which precluded the neceouity of further action.

Very truly youro, VERP .'T Y N 'E PUCLEAR POWER CORPORATION hl hl O 1 Robert F. nes '_#

Plant Superintendent ), 7[.

HFL/rph t- m <'

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