05000260/LER-1980-019-03, /03L-0:on 800413,output of Proportional Amplifier in FQ-68-5 Drifted High,Providing Higher than Normal Flow Signal to Average Power Range Monitors A,C & E.Caused by Instrument Drift.Amplifier Replaced & Recalibr

/03L-0:on 800413,output of Proportional Amplifier in FQ-68-5 Drifted High,Providing Higher than Normal Flow Signal to Average Power Range Monitors A,C & E.Caused by Instrument Drift.Amplifier Replaced & Recalibr

ML18025A829
Person / Time
Site:	Browns Ferry
Issue date:	05/01/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025A828	List: 05000260/LER-1980-019, Forwards LER 80-019/03L-0 05000260/LER-1980-019-03, /03L-0:on 800413,output of Proportional Amplifier in FQ-68-5 Drifted High,Providing Higher than Normal Flow Signal to Average Power Range Monitors A,C & E.Caused by Instrument Drift.Amplifier Replaced & Recalibr
References
LER-80-019-03L, LER-80-19-3L, NUDOCS 8005060238
Download: ML18025A829 (3)

LER-1980-019, /03L-0:on 800413,output of Proportional Amplifier in FQ-68-5 Drifted High,Providing Higher than Normal Flow Signal to Average Power Range Monitors A,C & E.Caused by Instrument Drift.Amplifier Replaced & Recalibr

Event date:
Report date:
2601980019R03 - NRC Website

text

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0 OB 60 61 DOCKET NUMSER 68 I73 EVENT DATE 74 76 REPORT DATE, 80 EVENT DESCRIPTIOI'I AND PROBABI.E CONSEQUENCES 010 During normal operation, the output of proportional amplifier in FQ-68-5 had drifted high providing higher than normal flow signal to APRM channels A, C, and E

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3 ~ 2.C).There have been noprevious occurrences.All re actor power changes were stopped until problem was resolved.

There was no hazard to the public health or safety.

Redundant channels were operable.

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33 34 35 36 37 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTI VE ACTIONS 027 o

Type 563-02 proportional amplifier drifted.

The am lifier was re laced, recalibrated, functionally tested, and returned to service.

The driftin was considered a

2 random occurrence and no further action is planned.

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0 METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 LAJOI Operator observed 46 16 LOCATIOhlOF RELEASE NA

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LEIS SU!'PLEMENTAL INFORMATION BFRO-5G-260 / 8019 'echnica?

Specification Involved Iteported Under Technical Specification 6

7 2.b (1)

Date of Occurrence 4/13/80 Time of Occurr ence 0900 Unit

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Identification and Des~cri tion of Occurrence:

The output of proportional amplifier in F~-F8-5 had drifted high providing higher than normal flow signal to APRM A, C, and E.

Conditions Prior to Occurrc>>ce:

Unit 1 9 82%

Unit 2 9 95%

Unit 3 6 97%

Actron specified in t?re Teclr>>ical Specification Surveillance.Requirements rr.

due to inoperable ectuiymrrrt.

Describe.

None

~A)arent Cause of Ocrurr.e:ice:

Instrument drift

~Anal aia of. Orcurrenee; There was no damage to the plant equipment.

There was no activity release, no personnel exposure or in]ury, and no danger'to health or safety of the public.

Corrective Action

Replaced proportional amplifiex, recalibrated and retr rned to service.

Failure Data:

None

~Retention:

eriod - Lifetime; Responsibility - Administrative Supervisor

>Revision:

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