05000255/LER-1981-010, Forwards LER 81-010/03L-0

Forwards LER 81-010/03L-0

ML18046A469
Person / Time
Site:	Palisades
Issue date:	02/27/1981
From:	Frost S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18046A470	List: 05000255/LER-1981-010, Forwards LER 81-010/03L-0 05000255/LER-1981-010-03, /03L-0:on 810205,primary Indicating Position Datalogger Became Inoperable.Caused by Failure of mercury- Wetted Relay in Gain Selection Portion of Input Amplifier of A/D Converter.Relay Replaced
References
NUDOCS 8103040681
Download: ML18046A469 (2)

LER-1981-010, Forwards LER 81-010/03L-0

Event date:
Report date:
2551981010R00 - NRC Website

text

consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201 * (517) 788-0550 February 27, 1981 Mr Jam.es G Keppler Office of Inspection and Enforcement Region III U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60127 DOCKET 50-255 - DPR PALISADES PLANT -

LICENSEE EVENT REPORT 81-010 -

. PIP DATALOGGER FAILURE On the reverse side is LER 81-010 which is reportable under Technical Specifi-cations 6.9.2.B(2).

Steven R Frost Palisades Licensing Engineer CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement NRC Resident Inspector-Palisades Plant Bi 0 "304-D 6 B I

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• MAR

. 3 1981.

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PALISADES PLANT NRC FORM366 17-771 U.S. NUCLEAR REGULATORV COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: ~I~.___._....... ~...._........ ~* IG) 1 e

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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LICENSEE CODE 14

,5 LICENSE NUMBER 25 26 LICENSE TYPE ao S7 CAT 58 CON"T [ill]

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74*

75 REPORT DATE BO EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

[]JI] I During normal plant operation, the primary indicating position (PIP) dataj [ill] I

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8 logger became inoperable.

Two hours after PIP becam_e inerable. power reduction to 85 percent was commenced per TS 3.11.e.

Condition is reportable per TS 6.9.2.b2.

No threat to public health or safety.

SYSTEM CODE I IID I@

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44 47 CI.I)) I Failure of a mercury-wetted relay in gain selection portion of the input o:::rrJ I amplifier of the A/D converter caused datalogger failure.

Relay *was*

replaced to restore operability.

A pm to periodically replace the A/D I

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