ML20150C728

LER#78-097/03L-0 on 781004:Unit 1 Component Cooling Radiat Monitor Would Not Respond to Check Source.Caused by Water Damaged Detector in Detector Well & Defective Rate Board

ML20150C728
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	11/03/1978
From:	Trzyna G COMMONWEALTH EDISON CO.
To:
Shared Package
ML20150C725	List: ML20150C722 ML20150C728
References
LER-78-097-03L, LER-78-97-3L, NUDOCS 7811240206
Download: ML20150C728 (2)

Text

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_'lol2l lDurinn refuelinn operations, the Itnit 1 connonent coolina rad. monitor, I f[o l3l l1RE00'17, would not respond to the check source. The monitor was taken 004

_ l o l41 land shif tly manual grab samples were taken as reauired by Tech. Spec. 3 . 1 41

,. 1015111.C. There were no safety implications involved and the health and

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1OleIlsafety of the public was not affected. (Previous LER's: 50-295/77-66 &-l

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40 47 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li l 0 t l The failure of the Westinchouse monitor was due to a detector that was l

[i;il [damaced from water in the detector well, and a defective rate board. TheI

,,;7, l detector, Harshaw-Chemical Co. part no. Os4/2, and rate board, Bertan I g3;3j j Associates part no. PCB100 were replaced. The monitor was recalibrated l i, ,,i[and rostored to service. No further corrective action is neco' mary. I 7 8 9 80 ST  % POWE n OTHE R ST ATUS Di C F DISCOVEnY DESCniPTION

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Glenn Trzyna 312 ,746-2084 e x.t . 263o ~-

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l D-22-1-78-187 Resolution of Event During refueling operations, the Unit 1 Component Cooling rad.

monitor, 1RE0017, would not respond to the check source. The monitor was taken OOS and shiftly manual grab samples were taken in accordance

. with Tech. Spec. 3.14.1.C. The failure of the Westinghouse monitor was due to a detector that was damaged from water in the detector well, and a defective rate board. The detector, Harshaw Chemical Co. part no.

6S4/2, and rate board, Bertan Associates part no. PCB100 were replaced.

The monitor was recalibrated, functionally tested and restored to service.

170 further corrective action 10 necessary.

Prepared by: Glenn Trayna s

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