ML20042C293

LER 82-018/03L-0:on 820221,during Normal Operation, Supression Pool Level Transmitter LT-4363B Responded Erratically,Trending Downscale.Caused by Interference by RHR Repairs.Transmitter Removed from Svc,Pending Repairs

ML20042C293
Person / Time
Site:	Duane Arnold
Issue date:	03/23/1982
From:	Varner D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042C288	List: ML20042C287 ML20042C293
References
LER-82-018-03L, LER-82-18-3L, NUDOCS 8203310175
Download: ML20042C293 (1)

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i o 121 l During normal operation, suopression pool level transmitter LT-43638 was i ITTT1i found to be responding erratically, trending downscale. The redundant 1 I

[TT71 L evel transmitter was operable, indicating normally. A 30-day limitino co I io # s 1 i ndition for operation (LCO) was entered as required by Technical Specifi I Io is i i cation Table 3.2.F. 30-day LCO ended after accrovimatelv 8 davs when LT- I l a t r l I 4363B was returned to service. No orevious similar occurrences. I t ois i I I 1 es **

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i i t a l l The erratic readinos were caused by interference with renair activitioc I i

i i t i i l on the RHR evstem. To orecludo further falco indicatinne nr inetrnmnn+ d 1 m I amace. LT-43638 was taken not nf enrvico until tho puo rnnair wnrte wac c I Ii iii l ompleted 8 days later. At that time, IT-4363B was tested satisfactorilv i m I and was declared operable. No corrective action planned. I 7 ea so i

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l Naveca*=er4 Rep David M. Varner ,,oy , . 319-851-5611 i, 1