ML20064B703

/03L-0 on 780221:during Rev Test Data on 780825, Noted That Final Setpoint Valve Entered on 780221 for RCS Loop 1B Cold Leg Loop Stop Valve Relief Line Flow Interlock Was 124 Gpm Caused by Improper Setpoint

ML20064B703
Person / Time
Site:	Beaver Valley
Issue date:	09/25/1978
From:	Werling J DUQUESNE LIGHT CO.
To:
Shared Package
ML20064B701	List: ML20064B698 ML20064B703
References
LER-78-048-03L, LER-78-48-3L, NUDOCS 7810100034
Download: ML20064B703 (1)

Text

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EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h l o 6 21 l During review of test data on 8/25/78, it was discovered that the final setpoint I 1 i m g value entered on 2/21/78 for the RCS Loop 1B Cold Leg Loop Stop Valve relief line l g I flow interlock was 124 GPM which is less than the required 125 GPM. The setooint j t

ioisi i was increased to 125 GPM. Since two flow switch interlocks per loop are recuired I l o is 1 I to allow opening of the valve, the interlock ooening scheme would have funettoned I Io,7l l as designed. I g io 4a1 i 'O I

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36 37 40 el 42 43 de 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l3 i o 1 i The incident was caused bv an imorener setootnt on the calibratien sheets allocine 1 t

i,,ii[ 125 +/- 1 GPM. *fhe calibrction sheet will be corrected to recuire at least 125 G M.]

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