ML19210E312

LER 79-057/03L-0:on 791030,during Surveillance Testing,One of Three Reactor Pressure Transmitters Found Out of Calibr. Instrument Settings Less Conservative than Required.Caused by Instrument Drift.Instrument Recalibr

ML19210E312
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/29/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210E311	List: ML19210E310 ML19210E312
References
LER-79-057-03L, LER-79-57-3L, NUDOCS 7912040323
Download: ML19210E312 (1)

Text

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (777)- .

LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATION)

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60 61 OOCKET mVM8tR 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 lOn October 30, 1979, during normal surveillance testing. one of three reactor pressure O 3 l transmitters was found to be out of calibration. This resulted in operation with l 0 4 l instrument settings less conservative than reOuired by Fort St. Vrain Technirn1 I O s l Specification LCO 4.4.1, and is reportable per AC 7.5.2(b)1 and AC 7.5.2(b)2. There l 0 6 lwas no affect on public health or safety. Redundant system was available and operablef iO 7 l 0 a l I

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35 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o lThis problem was due to instrument drift. The instrument vac recalibrated, and the I g l test was successfully completed. No further action is anticipated. I i 2 l I i a l l L1_14_j l l 7 8 9 80

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