05000335/LER-1981-028-03, /03L-0:on 810522,during Normal Operations,One of Two Chlorine Detectors in North Control Room Air Intake Failed.Caused by Clogging of Wick.Wick Replaced

/03L-0:on 810522,during Normal Operations,One of Two Chlorine Detectors in North Control Room Air Intake Failed.Caused by Clogging of Wick.Wick Replaced

ML20009G206
Person / Time
Site:	Saint Lucie
Issue date:	06/22/1981
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G202	List: 05000335/LER-1981-028, Forwards LER 81-028/03L-0 05000335/LER-1981-028-03, /03L-0:on 810522,during Normal Operations,One of Two Chlorine Detectors in North Control Room Air Intake Failed.Caused by Clogging of Wick.Wick Replaced
References
LER-81-028-03L, LER-81-28-3L, NUDOCS 8108030427
Download: ML20009G206 (2)

LER-1981-028, /03L-0:on 810522,during Normal Operations,One of Two Chlorine Detectors in North Control Room Air Intake Failed.Caused by Clogging of Wick.Wick Replaced

Event date:
Report date:
3351981028R03 - NRC Website

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,was returned to service in approximately 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />. The health and safety g,,,, pf the public was not aff ed. This is the third LER involving a failure i

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,,,,,i-The failure was due to clogging of the wick.

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Supplemental Information for l

Licensee Event Report 81-014 1.

Cause Description and Analysis i

On May 23, 1981, at approximately 0130 hours0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br /> with the plant at cold shutdown, a routine instrument calibration identified that the Hagan Summator (PM-4463) in the first stage turbine pressure I

channels which develops the high steam line flow setpoint for reactor protection safeguards had shifted nonconservatively approximately 3%.

This shift would have delayed but not prevented the fulfillment of the protection functions of this channel.

The redundant channel was operational so there was no threat to the health and safety of the public.

This event, which is contrary to Technical Specification 3.5.1, is reportable under Technical Specification 6.9.2.b.l.

2.

Corrective Action

1 The cause of this event was found to be the failure of a filter l

capacitor. This failure is attributed to normal wear resulting i

in the end-of-life of the compotient.

The faulty capacitor was replaced and the module recalibrated on May 23, 1981.

3.

Corrective Action to Prevent Further Occurrence i

Since the failure is attributed to normal wear, no further action is required. The module is tested and recalibrated yearly.

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