05000327/LER-1981-007-03, /03L-0:on 810116,level Channel for Steam Generator 3 (L-3-97) Declared Inoperable.Caused by Failure of Trip Bistable 1-LS-3-97F to de-energize.Module Replaced,Calibr & Returned to Svc

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/03L-0:on 810116,level Channel for Steam Generator 3 (L-3-97) Declared Inoperable.Caused by Failure of Trip Bistable 1-LS-3-97F to de-energize.Module Replaced,Calibr & Returned to Svc
ML20003B256
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 02/05/1981
From: Mcgriff J, Wilkey A
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003B250 List:
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8102100557
Download: ML20003B256 (1)


LER-1981-007, /03L-0:on 810116,level Channel for Steam Generator 3 (L-3-97) Declared Inoperable.Caused by Failure of Trip Bistable 1-LS-3-97F to de-energize.Module Replaced,Calibr & Returned to Svc
Event date:
Report date:
3271981007R03 - NRC Website

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ENets Iof*l l At 1035 CST with unif: I at 50% RTP. the level channel for steam nenerator #3 (L-3-97)I [o 1il I was declared inoperalle when the trip bistable (1-LS-3-97F) failed to deenergize t

[o ji] l during the performance of the scheduled functienal test. The bistable was lo is] [

manually tripped in accordance with action statement 7 of LCO 3.3.1.1.

There was r o l t o I s. l l effect on public health or safety. No previous occurrences.

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The level channel failed because the bistable would not deenernize. Thtmodule was 1 [T{~) l replaced calibrated, and returned to service. Since this is the first occorranca I

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