05000298/LER-1981-011-03, /03L-0:on 810528,during Insp of Unexpected Alarm, CS Header Break Detection Instrument Switches Found Piped to Incorrect Lines.Caused by Connection to Wrong Line at Drywell Penetration.Instruments Connected to Proper Lines

/03L-0:on 810528,during Insp of Unexpected Alarm, CS Header Break Detection Instrument Switches Found Piped to Incorrect Lines.Caused by Connection to Wrong Line at Drywell Penetration.Instruments Connected to Proper Lines

ML20009E620
Person / Time
Site:	Cooper
Issue date:	06/16/1981
From:	Flannigan R NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009E596	List: 05000298/LER-1981-011, Forwards LER 81-011/03L-0.Detailed Event Analysis Submitted 05000298/LER-1981-011-03, /03L-0:on 810528,during Insp of Unexpected Alarm, CS Header Break Detection Instrument Switches Found Piped to Incorrect Lines.Caused by Connection to Wrong Line at Drywell Penetration.Instruments Connected to Proper Lines
References
LER-81-011-03L, NUDOCS 8107280319
Download: ML20009E620 (1)

LER-1981-011, /03L-0:on 810528,during Insp of Unexpected Alarm, CS Header Break Detection Instrument Switches Found Piped to Incorrect Lines.Caused by Connection to Wrong Line at Drywell Penetration.Instruments Connected to Proper Lines

Event date:
Report date:
2981981011R03 - NRC Website

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60 63 DOCK E T NUMB E R 68 69 EVENT DATE 14 7S REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I O I 21 lAs part of a follow-up inspection of an *mexpected alarm. it was discovered that thel j o l 3 l [CS header break detection instrument swit hes were piped to the incorrect CS lines,I inl,yl1.e., CS-DPIS-43A was connected to the B loop header and CS-DPIS-43B to the A loop l o., jheader. At the tine of the discovery of the occurrence the CS systems were not re-l l o lo l Iquired to be operable. This occurrence had no adverse affect on the public he.alth l

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