05000368/LER-1979-097-03, /03L-0:on 791128,during Mode 2 Operation, Containment Bldg Sump Level Indicator Found Reading 0.0%. Caused by Faulty Convertor & Power Supply Which Were Replaced.Unit Calibr & Returned to Svc

/03L-0:on 791128,during Mode 2 Operation, Containment Bldg Sump Level Indicator Found Reading 0.0%. Caused by Faulty Convertor & Power Supply Which Were Replaced.Unit Calibr & Returned to Svc

ML19257A736
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/28/1979
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257A734	List: 05000368/LER-1979-097, Forwards LER 79-097/03L-0 05000368/LER-1979-097-03, /03L-0:on 791128,during Mode 2 Operation, Containment Bldg Sump Level Indicator Found Reading 0.0%. Caused by Faulty Convertor & Power Supply Which Were Replaced.Unit Calibr & Returned to Svc
References
LER-79-097-03L, LER-79-97-3L, NUDOCS 8001070489
Download: ML19257A736 (1)

LER-1979-097, /03L-0:on 791128,during Mode 2 Operation, Containment Bldg Sump Level Indicator Found Reading 0.0%. Caused by Faulty Convertor & Power Supply Which Were Replaced.Unit Calibr & Returned to Svc

Event date:
Report date:
3681979097R03 - NRC Website

text

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LICENSEE EVENT REPORT EXHIBIT A CONTROL SLOCK: 1 l l I l l lh (PLE ASE PRINT OR TYPE ALL REOUIRED INFORMATIONI E I A]R l A l Nl 0 l plgl 0 j0 l -l0 l 0 l 0l 0l 0 - l 0 l0 [g4 l1 ] 1l1 1lgl l g

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74 76 HFPoM T Dati 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h IDurina Mode 2 coeration the containment buildino sumn level indicator o

I(2LI-5646-2) was discovered to be readino 0.0%.

The redundant level o

indicator (2LI-5646-1) remained operable.

This occurrence is similar i

o Ln_.u.J l to LER 50-368/79-079.

Reportable oer T.S. 6.9.1.9.t.

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Investication revealed a faulty convertor and power supply.

Power supplyi i o and convertor were replaced. The unit was calibrated and returned to

, i i service within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> meeting requirements of Action Statement 3.3.3.6 4

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