05000272/LER-1981-091-03, /03L-0:on 810929 & 1001,Channel 3 Pressurizer Level Read Higher than Other Channels.Caused by Transmitter Drifting Out of Calibr.Transmitter Recalibr

/03L-0:on 810929 & 1001,Channel 3 Pressurizer Level Read Higher than Other Channels.Caused by Transmitter Drifting Out of Calibr.Transmitter Recalibr

ML20011A953
Person / Time
Site:	Salem
Issue date:	10/21/1981
From:	Dickey F Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20011A948	List: 05000272/LER-1981-091, Forwards LER 81-091/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-091-03, /03L-0:on 810929 & 1001,Channel 3 Pressurizer Level Read Higher than Other Channels.Caused by Transmitter Drifting Out of Calibr.Transmitter Recalibr
References
LER-81-091-03L-01, LER-81-91-3L-1, NUDOCS 8111030403
Download: ML20011A953 (1)

LER-1981-091, /03L-0:on 810929 & 1001,Channel 3 Pressurizer Level Read Higher than Other Channels.Caused by Transmitter Drifting Out of Calibr.Transmitter Recalibr

Event date:
Report date:
2721981091R03 - NRC Website

text

CRC FORM 366 U. S NUCLEs.O CE GUL ATOP.Y COMMIS5sDN (7 77)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Iol2i l On two separate occasions, September 29, 1981 and October 1, 1981, an operator g

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Io I4 I l channels. At 0720 and 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br />, respectively, the channel was declared inoperable,j loi5l l and limiting condition for operation (LCO) 3.3.1.1, Action 7 was entered.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i I e l l On both occasions the Channel 3 Pressuriner Level bistable was placed in the tripped l lili1l condition within one hour.

On September 29 the transmitter was recalibrated, tested l l,1 ; i l satisfactorily, and returned to service. On October 1 the transmitter was backfilled; l l3l l to remove trapped air, recalibrated, tested satisfactorily, and returned to service. l lt la i 1 At 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br />, September 30, 1981 and 2210 hours0.0256 days <br />0.614 hours <br />0.00365 weeks <br />8.40905e-4 months <br />, October 3, 1981, respectively, l

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