ML20009G114

LER 81-090/03L-0:on 810530,while Entering Mode 3,S/G 1B Wide Range Level Instrumentation Pegged High.Caused by Equalizer Valve on Transmitter 1CFLT5620 Valving Open,Resulting in Drained HP Ref Leg.Valve Closed & Leg Filled

ML20009G114
Person / Time
Site:	McGuire
Issue date:	06/25/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G105	List: ML20009G104 ML20009G114
References
LER-81-090-03L, LER-81-90-3L, NUDOCS 8108030339
Download: ML20009G114 (1)

Text

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event arsenirnoN ANQ PROS ASLE CoNsEQufNC(s h a 2 I on Miv 30. 1981 at 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />, Unit I was entering Mode 3 from dode 4 but g

@l the S/G "1B" wide rcnge level instrumentation had been pegged high. Hence, o A I the shift supervisor declared the instruments inoperable per Technical Speci g ITITI I M en H nn 1.3.3.5 which is reportable per Technical Specification 6.9.1.13(b).i ITTi~l i This was similar to previous LER/R0 81-048/03L-0. Since redundant in- ,

@ l. strumentatien was available, the health and safety of the public were not ,

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LLLJ l hn,4e narannnal found that the equalizer valve on transmitter ICFLT5620 had Ii ei1 I been valved open which resulted in draining of the HP reference leg.

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mI unkno_wn how the valve was lef t open. The valve was closed and the re- ,

l im [ ference leg filled. The wide range instrumentation was checked for proper ,

@l operation and declared operable.

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