05000333/LER-1979-098, Forwards LER 79-098/03L-0

Forwards LER 79-098/03L-0

ML19253C287
Person / Time
Site:	FitzPatrick
Issue date:	11/28/1979
From:	Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19253C288	List: 05000333/LER-1979-098, Forwards LER 79-098/03L-0 05000333/LER-1979-098-03, /03L-0:791031,monitor 17-RIS-458B Operated Improperly During Insp & Continuous Inoperable Trip Resulted.Caused by Failure of Inoperable Trip Circuit. Circuit Board Replaced & Instrument Demonstrated Operable
References
JAFP-79-663, NUDOCS 7911300436
Download: ML19253C287 (1)

LER-1979-098, Forwards LER 79-098/03L-0

Event date:
Report date:
3331979098R00 - NRC Website

text

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2 POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITzPATRICK NUCLEAR POWER PLANT A.

JOHN D. LEONARD, JR.

P.o. box 41 Resident Manager November 28, 1979 Lycoming, New York 13093 JAFP-79-663 3,,.3g3,,,

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Mr. Boyce H. Grier United States Nuclear Regulaury Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406 Re fe rence:

Docket No. 50-333 Licensee Event Report:

79-098/03L-0

Dear Mr. Grier:

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We have enclosed the referenced Licensee Event Report in

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accordance with Section 6.0 of Technical Specifications and USNRC Regulatory Guide 1.16.

If there are any questions concerning this report, please

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contact Mr. W. Verne Childs at 315-342-3840, Extension 207 iQ_f;;:

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.' echard, JDL:VC:jnk J n Enclosure Resident Manager

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CC:

USNRC Director, Office ok Inspection V nforcement (30 copies)

USNRC Director, Office of Management Information & Program Control (3 copies)

Internal Power Authority Distribution

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7911800'436

POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 79-098/03L-0 Page 1 of I During normal operation while conducting surveillance testing under F-ISP-26 titled "Radwaste Building Exhaust Moni tor" to satisfy the requi rements of Technical Speci fications Appendix A, Table 4.2-4 moni tor 17-RIS-458B was found operating improperly. While the moni tor and output indication was operating properly, the unit's

- " Inoperable" trip function had failed in such a manner as to result in a continuous " inoperable" trip output. This failure is considered

. as failure in the conservative direction which would have resulted in isolation of the Radwaste Bui,lding Ventilation System when the redundant monitor provided a trip signal.

In addition, the redundant monitor was fully operable. Therefore, the event did not represent a significant hazard to the public health and sarety.

Investigation revealed failure of the unit's inoperable trip

' circuit.

Following replacement of the printed circuit board containing the trip circuit on the following day,the instrument was demonstrated operable by successful completion of F-ISP-26 and returned to service.

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