05000010/LER-1979-002-03, /03L-0 on 780825:during Monthly Surveillance DI5 5400-2,offgas Monitor 1 Tripped at Greater than 100%, Which Is Not within Setpoint Limit.Caused by Instrument Drift.Setpoint Recalibr

/03L-0 on 780825:during Monthly Surveillance DI5 5400-2,offgas Monitor 1 Tripped at Greater than 100%, Which Is Not within Setpoint Limit.Caused by Instrument Drift.Setpoint Recalibr

ML19225B518
Person / Time
Site:	Dresden
Issue date:	07/13/1979
From:	Mancini B COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19225B517	List: 05000010/LER-1979-002, Forwards LER 79-002/03L-0 05000010/LER-1979-002-03, /03L-0 on 780825:during Monthly Surveillance DI5 5400-2,offgas Monitor 1 Tripped at Greater than 100%, Which Is Not within Setpoint Limit.Caused by Instrument Drift.Setpoint Recalibr
References
LER-79-002-03L-04, LER-79-2-3L-4, NUDOCS 7907250291
Download: ML19225B518 (1)

LER-1979-002, /03L-0 on 780825:during Monthly Surveillance DI5 5400-2,offgas Monitor 1 Tripped at Greater than 100%, Which Is Not within Setpoint Limit.Caused by Instrument Drift.Setpoint Recalibr

Event date:
Report date:
0101979002R03 - NRC Website

text

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f,0 G1 DOC A ET NUMB E R LA 63 EVENT DAT 74 75 REPORT DATE 80 EVENT DESCIUPTION AND PROB ABLE CCNSEQUENCES h l During monthly Surv. DIS 5400-2, #1 off-Cas monitor tripped at > 100% which is not I

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within Dresden setpt limit of 80 +/-1%.

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g g ;setpt limit of 80% full scale =

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Exact trip setpt undetemined. Safety significance minimal - redundant, l

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7 g [ monitor operable.

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No circuit c rob im-s or m q iphysical component failures could be identified.

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