ML20041C323

LER 82-002/03L-0:on 820121,during Surveillance Testing, W/Reactor Shut Down,Three Loss of Bearing Water Pressure Differential Switches Found W/Setpoints Less Conservative than Required.Caused by Instrument Drift.Switches Recalibr

ML20041C323
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/19/1982
From:	Fuller C PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20041C320	List: ML20041C319 ML20041C323
References
LER-82-002-03L, LER-82-2-3L, NUDOCS 8203010164
Download: ML20041C323 (1)

Text

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NRC FORM 366 U. S. NUCLE A3 REOULATCGY COMMISSION (7 77).

LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) foTT1 7 8 9 1 C lLICENSEE 01 F CODE l S l V 14l 1 l@l 15 0101 -l 01010 l 010 l - 1010 2$l@l 264 I l LICENSE LICENSE NUM8ER 11 ( 2TYPE l OJOl@l67 CAl T b8l@

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EVENT DESCRIPTION AND pro 8ABLE CONSEQUENCES h ITTTI I During scheduled Surveillance Testing, with the reactor shutdown, three loss of l 0 3 l bearing water pressure diffemntial switches were found with setpoints less conserva- l r5 T71 dive than mquired by LC0 4.4.1. This is mportable per Fort St. Vrain Technical l l O i s i l Specification AC 7.5.2(b)l. No accompanying occurrence. No effect on public health l l 0 g i l or safety. Related occurrences am R0's81-005, 79-60, and 79-11. l 10171 I l l

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Ii i O I l Thme ITT Rartnn orpssure di fferential indicatina switches . model P288-A. had set- 1 i i l ooints less conservative than reouired by LCO 4.4.1 due to ins trument drif t. The I i 2 I switches wem calibrated, and the surveillance was successfully completed. No I t i l a i l further corrective action is anticipated or required. I I

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