05000267/LER-1980-018-03, /03L-0:on 800327,w/plant Operating at Approx 51% Thermal Power,One Loop 2 Hot Reheat Header Activity Monitor Found Inoperable.Caused by Failure of Motorola Chip (MPS-66A)in Operational Amplifier to Detector Preamp

/03L-0:on 800327,w/plant Operating at Approx 51% Thermal Power,One Loop 2 Hot Reheat Header Activity Monitor Found Inoperable.Caused by Failure of Motorola Chip (MPS-66A)in Operational Amplifier to Detector Preamp

ML19309F858
Person / Time
Site:	Fort Saint Vrain
Issue date:	04/25/1980
From:	Gehm S PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19309F851	List: 05000267/LER-1980-018, Forwards LER 80-018/03L-0 05000267/LER-1980-018-03, /03L-0:on 800327,w/plant Operating at Approx 51% Thermal Power,One Loop 2 Hot Reheat Header Activity Monitor Found Inoperable.Caused by Failure of Motorola Chip (MPS-66A)in Operational Amplifier to Detector Preamp
References
LER-80-018-03L, LER-80-18-3L, NUDOCS 8005010455
Download: ML19309F858 (1)

LER-1980-018, /03L-0:on 800327,w/plant Operating at Approx 51% Thermal Power,One Loop 2 Hot Reheat Header Activity Monitor Found Inoperable.Caused by Failure of Motorola Chip (MPS-66A)in Operational Amplifier to Detector Preamp

Event date:
Report date:
2671980018R03 - NRC Website

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NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT

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60 61 DOCKET NUMSER 68 59 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h io ;al l At 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on March 27, 1980, with the plant operating at approximately 51% thermall goi3; l power and 158 MWe, Operations perscnnel observed one of three Loop 2 hot reheat header l Io i4l l activity monitors was inoperable. This resulted in a degraded mode of LCO 4.4.1.

l loisl l Table 4.4-2 and is reportable per AC 7.5.2(b)2.

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l o is I I able. No affect on public health or safety. Similar occurrence reported in RO 78-07. l 10171 l l

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33 35 36 31 40 el 42 43 44 47 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS h I i t o i 10ne radiation monitor became inoperable due to failure of a Motorola chip (MPS-66A) inI g l the operational amplifier to the detector preamp. The failed component was replaced I

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