ML19341B678

Updated LER 80-091/03L-1:on 801113,during Low Power Physics Testing,Boron Injection Tank Indicated Both Low & High Boron Concentrations.Caused by Insufficient Recirculation Through Surge Tank.Sys Valve List Will Be Corrected

ML19341B678
Person / Time
Site:	Beaver Valley
Issue date:	01/29/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19341B677	List: ML19341B676 ML19341B678
References
LER-80-091-03L, LER-80-91-3L, NUDOCS 8102030632
Download: ML19341B678 (2)

Text

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EVENT OESCRIPTION AND PRC8A8tE CCNSEQUENCES h j o 2 lAt 1345 hours0.0156 days <br />0.374 hours <br />0.00222 weeks <br />5.117725e-4 months <br /> with low power physics testing in progress, routine sampline of the A l g l Boron Injection Tank (BIT) indicated a low boron concentration in the tank.

g lsecond sample also read low. After adding 100 pounds of boron, sampics indicated a l lTTT1 lhidi concentration. A dilution was benun, brinning the BIT hack into specification I I

g lat 2010 hours0.0233 days <br />0.558 hours <br />0.00332 weeks <br />7.64805e-4 months <br />. BVPS was in the startup mode after refueling. A steam break l

go # y; l accident would not have returned the core to a critical condition.

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to I l i l o l l The low and high boron concentrations in the BIT are considered to be due g l insufficient recirculation through the surge tank prior to sampling. A leakine valve was originally reported as the cause for the low concentration. Normal system!

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,,33l arrangement bypasses the surge tank. The system valve list will be corrected.

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,o Attachment To LER 80-91/03L-1 Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 4

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