05000311/LER-1980-020-03, /03L-0:on 800729,during Routine Operation, Pressurizer Pressure Channel 3 Would Not Respond to Pressure Changes in Sys.Caused by Shorted Wire on Power Supply. Power Supply Repaired

/03L-0:on 800729,during Routine Operation, Pressurizer Pressure Channel 3 Would Not Respond to Pressure Changes in Sys.Caused by Shorted Wire on Power Supply. Power Supply Repaired

ML18082B013
Person / Time
Site:	Salem
Issue date:	08/28/1980
From:	Newman R Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18082B012	List: 05000311/LER-1980-020, Forwards LER 80-020/03L-0 05000311/LER-1980-020-03, /03L-0:on 800729,during Routine Operation, Pressurizer Pressure Channel 3 Would Not Respond to Pressure Changes in Sys.Caused by Shorted Wire on Power Supply. Power Supply Repaired
References
LER-80-020-03L-01, LER-80-20-3L-1, NUDOCS 8009030620
Download: ML18082B013 (1)

LER-1980-020, /03L-0:on 800729,during Routine Operation, Pressurizer Pressure Channel 3 Would Not Respond to Pressure Changes in Sys.Caused by Shorted Wire on Power Supply. Power Supply Repaired

Event date:
Report date:
3111980020R03 - NRC Website

text

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I During routine operations on July 29, 1980, it was determined that Pressurizer Pressure Channel III would not respond to pressure changes in the system.

Action Statement 3.3.2.1 was entered at 0610 hours0.00706 days <br />0.169 hours <br />0.00101 weeks <br />2.32105e-4 months <br />.

On August 1, 1980, the same channel I

failed low.

The Action Statement was entered at 1529 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.817845e-4 months <br />.

On both occasions, the appropriate bistables were tripped.

(Docket 50-272/80-13 and Docket 50-311/80- I 15).

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On July 29, 1980, investigation revealed a shorted wire on the power supply.

The power supply was repaired, tested satisfactorily and the Action Statement terminated at 1530 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.82165e-4 months <br />.

On August 1, 1980, a comparator was failed and was rIII:J

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