ML20003E946

LER 81-013/03L-0:on 810312,safety Injection Tank Level Transmitter Indicated Normal Level W/Presence of Low Level Alarm.Caused by Bad Amplifier Card in Transmitter. Transmitter Replaced

ML20003E946
Person / Time
Site:	Millstone
Issue date:	04/09/1981
From:	NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003E937	List: ML20003E936 ML20003E946
References
LER-81-013-03L-01, LER-81-13-3L-1, NUDOCS 8104170545
Download: ML20003E946 (1)

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7 5 60_ 63 OOCKEINUMuEH EVENT OFSCHIPTION AND PROBAULE CONSEQUENCES I

o 2 l During routine operations, the A Safety Inject _ ion Tan'LLSR) level transmitter was g g l ndicatingi normal level wi_th the presence of a 1sw_ level alarm. Subse_quqnt_

n invntication!

f I O I d I lindicated that the 1Ean.5mi tier _was_ Diving _a_.falsc_ reading _ Action Statement __3.,_51J I

10151 Iwas entered to allow repair. When_m-cacrSizcLtho SIT levn1 was found to be low at

'O s 153.8 per-cent. Operation _c_orttinueLunder_thn Action Stalemertt_until le.veLwas_rcstar.edJ Similar LERs i

['677] lto the 55 per-cent minimumlo_tal time in Action Statomont- 48 m.n.

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l 31011 The cause of the erroneous level indication was traced to a bad amplifier card I

The entire transmitter was replaced. The transmitter is a i i l ia the transmitter.

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