05000368/LER-1981-024-03, /03L-0:on 810627,containment Pressure,Air Temp & Relative Humidity Were Outside Acceptable Tech Spec Stds. Caused by Main Chiller Tripping

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/03L-0:on 810627,containment Pressure,Air Temp & Relative Humidity Were Outside Acceptable Tech Spec Stds. Caused by Main Chiller Tripping
ML20010C322
Person / Time
Site: Arkansas Nuclear 
Issue date: 07/27/1981
From: Shively C
ARKANSAS POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010C319 List:
References
LER-81-024-03L, LER-81-24-3L, NUDOCS 8108190349
Download: ML20010C322 (1)


LER-1981-024, /03L-0:on 810627,containment Pressure,Air Temp & Relative Humidity Were Outside Acceptable Tech Spec Stds. Caused by Main Chiller Tripping
Event date:
Report date:
3681981024R03 - NRC Website

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l During Mode 3 operation, the combination of Containment pressure. average I o 2

- l air temperature, 6 relative humidity was determined to be outside the i

l region of acceptable operation as defined by T.S. Fj uure 3.6-1 on the 1

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o s i following dates: 6/27/81, 6/28/81, and 7/4/81.

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CAUSE DESCRIPTION ANo CORRECitVE ACTIONS h IContainment temperature increase was due to Main Chiller, 2VQi-1B, trip-r i o l ping, causing an elevated chilled water temperature supplying the con-i i

g Itainment coolers.

He "A" Main chiller was~ out of service for maintenancq.

g 1%e 6/27 trip was caused by a motor winding internal temperature sensor l

@ l failure, 6/28 trip by a control transformer failure, 6 7/4 trip by a clogt

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