ML19257B365

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LER 79-109/03L-0:on 791213,during Instrument Surveillance Procedure F-ISP-27,suppression Chamber Temp Recorder 27-TR-102 Found Out of Calibr in Nonconservative Direction. Caused by Failed Printed Circuit Board
ML19257B365
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 01/08/1980
From: W. Verne Childs
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257B360 List:
References
LER-79-109-03L, LER-79-109-3L, NUDOCS 8001150616
Download: ML19257B365 (2)


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POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET No. 50-333 ATTACHMENT TO LER 79-109/03L-0 Page 1 of I During normal operations, while conducting instrunent Surveillance Procedure F-ISP-27 titled "Drywell and Suppression Pool Temperature Instrument Calibration",

suppression chamber temperature recorder 27-TR-102 was found out of calibration in the non-conservative direction. During the surveillance that was being con-ducted to satisfy the requirements of Technical Specifications Appendix A, Table 4.2-6, the instrument was found reading approximately 2.5% low compared to a procedural limit of 1.3%. The redundant instrument measuring the same parameter was verified operable-therefore the event did not represent any significant hazard to the public health and safety.

Investigation revealed a failed printed ci rcui t board. Following replacement of the printed circuit board, the instrument was verified operable by satisfactory completion of F-ISP-27 on the same day as the failure was discovered.

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