ML20087B892

Telecopy Ao:On 750822,channel of Protection Found Unconservative Due to Failure of Resistance Temp Detector

ML20087B892
Person / Time
Site:	Surry
Issue date:	08/22/1975
From:	Sweeney E VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20087B799	List: 05000280/LER-1975-016, Updated LER 75-16/010:on 750822 & 23,channel II Protection Drifted in Nonconservative Direction.Caused by Moisture Accumulation Between Senson Insulation & Copper Lead Wire. All RTDs Replaced W/Improved Versions 05000280/LER-1975-016-01, /01T:on 750822,Channel II Protection Drifted in Nonconservative Direction.Caused by Incorrect Resistance of Hot Leg Resistance Temp Detector (Rtd).Packing Replaced & RTD Ohmic Characteristic Returned to Normal ML20087B892
References
NUDOCS 8403090391
Download: ML20087B892 (1)

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.mo yW%#%WF winct.vA net.tRfC AND PWtM CCMPA.W' Surry Power Station P.O. Box 315 Surry, Virginia 23883

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Director of Regulatory Operations 230 Peachtree Street, N. W.

Suite S18 Atlanta, Georgia 30303 This is to inform you by'telecopy of an Abnormal Occurrance that was noted on August 22, 1975 at St.rry Nuclear P(Ater Station.

With Unit 1 operating at approxinately -98 per cant power, it was found that one channel of AT protection was unconservative due to the. failure of a resistance temperatura detector.

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Ja E. M. Sweeney, Jr.y_

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