ML20009F001

LER 81-012/03L-0:on 810519,during Testing HPCI-PS-68D Tripped at 89 Psig Instead of 100 Psig Tech Spec Limit. Caused by Random Instrument Drift.Instrument Immediately Recalibr & Returned to Svc

ML20009F001
Person / Time
Site:	Cooper
Issue date:	06/18/1981
From:	Flannigan R NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009E995	List: ML20009E994 ML20009F001
References
LER-81-012-03L, LER-81-12-3L, NUDOCS 8107280598
Download: ML20009F001 (1)

Text

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1. # 60 68 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 During routine surveillance testing, it was discovered that HPCI-PS-68D tripped at i 90,3i i89 psig instead of the >100 psig Tech. Spec. limit. At the time of the occurrence, l o 4 lthe reactcr was in cold shutdown and HPC1 was not required to be operable. This l lnisj [ event is repetitive (Ref. A0-74-58). This event had no adverse affect on the public l o ,3 fealth and safety. 1

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44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i I o l Rhe cause of this occurrence was random f astrument drift. This is a Barksdale (Modell i i IB2T-M1255) nresaure switch and it has exhibited drift once nrovinnalv in thic nn- I i 7 l plication in 1974. The instrument was immedittelv reen11brated nnd returned to l 1 3 lnorvico_ Mn fnvehov neeinn 4e n1nnnnA.  !

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+ ichard D. Flannigan 8107280598 810618 PHONE: E PDR ADOCK 05000298 l S PDR _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

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