05000259/LER-1980-074-03, /03L-0:on 800924,during Normal Operation,Seismic Monitor SMA2 Found Inoperable.Caused by Failed Printed Wiring Board 100935.Assembly Repaired,Tested & Returned to Svc.Failure Considered Random.No Further Action Planned

/03L-0:on 800924,during Normal Operation,Seismic Monitor SMA2 Found Inoperable.Caused by Failed Printed Wiring Board 100935.Assembly Repaired,Tested & Returned to Svc.Failure Considered Random.No Further Action Planned

ML19338G151
Person / Time
Site:	Browns Ferry
Issue date:	10/23/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338G125	List: 05000259/LER-1980-074, Forwards LER 80-074/03L-0 05000259/LER-1980-074-03, /03L-0:on 800924,during Normal Operation,Seismic Monitor SMA2 Found Inoperable.Caused by Failed Printed Wiring Board 100935.Assembly Repaired,Tested & Returned to Svc.Failure Considered Random.No Further Action Planned
References
LER-80-074-03L-01, LER-80-74-3L-1, NUDOCS 8010280511
Download: ML19338G151 (2)

LER-1980-074, /03L-0:on 800924,during Normal Operation,Seismic Monitor SMA2 Found Inoperable.Caused by Failed Printed Wiring Board 100935.Assembly Repaired,Tested & Returned to Svc.Failure Considered Random.No Further Action Planned

Event date:
Report date:
2591980074R03 - NRC Website

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60 61 DOCK ET NUMSER 68 69 EVENT DATE 74 76 REPORT DATE SC EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Ioi2l l During normal operation, seismic monitor SMA2 was four.d inoperable at 0730 (T.S. 3.2.J) m j 2).

Other seismic nonitoring instruments listed in T.S. Table 3.2.J were operable.

l ITTTlI There was no effect on the health or safety of the public. There have been no l

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,,;l Printed wiring board 100935 failed. The assembly was repaired, functionally tested, l

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Tannessee Valley A'athority peri, 3 g.g 7 Browns Ferry Nuc! car Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION B F RO-50 259 / 8074 Technical Specification invo!ved Table 3.:..J.2 Reported Under Technical Specif! cation 6.7.2.b(2)

Date of Occurrence 9/24/80 Time of Occurrence 0730 1

Unit Identification and DescLp_ti_on of Occurrence:

i Seismic monitor SMA2 was found inoperable at 0730.

Conditions Prior to Occurrence:

U-l at 95% power U-2 shutdown for refueling U-3 at 87% power Action specified in the ~'schmcat Specif: cation Survet:!aac7 f(equirements met GA to ine,perable yquipent.

De scrite.

Instrument was returned to service within the time limit specified.

,.jp,irint C tqpe of Occurre_nce:

Failure of a printed wiring board assembly...

Analysis e.,f Occurrence:

There was no damage to any plant equipment. No ac.tivity released. No personnel exposure or injury and no danger to the public health or safety.

Cearective Action:

Repaired, functionally tested and returned to service at 1630.

F:njufo Data; None

• .; Retention :

eried - Lifetime; Responsibility - Ad:uialstrative Supervisor O,

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