ML20041C276

LER 82-003/03L-0:on 820122,one Drain Malfunction Pressure Differential Switch on 1C Helium Circulator Found Less Conservative than Tech Specs.Caused by Dirty Contacts. Contacts Cleaned & Switch Recalibr

ML20041C276
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
ML20041C273	List: ML20041C272 ML20041C276
References
LER-82-003-03L, LER-82-3-3L, NUDOCS 8203010027
Download: ML20041C276 (1)

Text

NRC FORM 36G U.S. NUCLEAR REGULATcRY COMMISSION (7 77)

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61 DOCKET NUM8ER 68 69 EVENT DATE 14 75 REPORT DATE 80 EVENT oESCRIPTioN AND pro 8ABLE CONSEQUENCES h l0l2l l During the annual calibration of the helf en circulator drain omssure instrumentation,I i O ,3 i l Results personnel found one of thme drain malfunction pressum differential switches l 10 :41 t on 1C circulator less . conservative than mquired by LC0 4.4.1. Table 4.4.3. This is l l O i s i i reportable per Technical Specification AC 7.5.2(b)l. No affect on public health or l l O is i i safety. Redundant system available and operable. No accompanyino occurrence or i 10 l 2 l l probable consequences. l l

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTloNS h ii iOi l The cause of the switch being out of calibration was found to be dirty contacts which I ii ii i l pmvented the switch from functioning accurately wi thin the calibration rance. The I

, , l faulty contacts were cleaned, and the switch calibrated to the required setooint as l g l mqui red by LC0 4.4.1, Table 4.4.3.(s). I i 4 1 l

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