ML20010D070

LER 81-040/03L-0:on 810717,during Calibr of Panel C-19, Iodine Radiation Monitor Channel Observed to Be Inoperative. Caused by Opened Transistor Due to Voltage Transient. Transistor Replaced & Calibr Completed

ML20010D070
Person / Time
Site:	Pilgrim
Issue date:	08/14/1981
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010D067	List: ML20010D066 ML20010D070
References
LER-81-040-03L, LER-81-40-3L, NUDOCS 8108210424
Download: ML20010D070 (1)

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REPORT DATE

! 7 8 60 61 DOCKET NUMBE R 68 69 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCEL h j l0 l2l l During Cheraistry Lab calibration of Panel C-19 (Lenk Dornet-inn Air Snmnior) thn l l lo lal l iodine Radiation Monitor channel was observed to be inonerative. This is contrnrv l 3

j 10IM l to T.S. 3.6.C.2_which limits reactor oceration to the succeedine seven anys nr untill j lo isi l system is declared operable. Durinst the time the system was inonerable. the 1 1

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h .

1 l1 l0 l l An "A" priority MR (#81-4-38) was issued to determine cause and to correct this I i

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l1 lil L failure. In the process of replacinn a t rendine recorder to the indinn chnnnni 1 i 7 l a voltage transient occurred causinn a transistor to onen. The transistor was I

i 3 l replaced, the calibration completed and the system declared operative that same l i

i1 14 I l day. This is an isolated event. I

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' G.o. Whitney NAME OF PREPAR8iR PHONE: 617-746-7900 {

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