05000333/LER-1979-028-03, /03L-0 on 790517:during Cold Shutdown,Level Instrument of Carbon Dioxide Storage Sys Was Out of Calibr. Caused by Procedural Error.Instrument Racalibr & Satisfactorily Tested

/03L-0 on 790517:during Cold Shutdown,Level Instrument of Carbon Dioxide Storage Sys Was Out of Calibr. Caused by Procedural Error.Instrument Racalibr & Satisfactorily Tested

ML19273B945
Person / Time
Site:	FitzPatrick
Issue date:	05/17/1979
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
ML19273B943	List: 05000333/LER-1979-028, Forwards LER 79-028/03L-0 05000333/LER-1979-028-03, /03L-0 on 790517:during Cold Shutdown,Level Instrument of Carbon Dioxide Storage Sys Was Out of Calibr. Caused by Procedural Error.Instrument Racalibr & Satisfactorily Tested
References
LER-79-028-03L, LER-79-28-3L, NUDOCS 7906180567
Download: ML19273B945 (2)

LER-1979-028, /03L-0 on 790517:during Cold Shutdown,Level Instrument of Carbon Dioxide Storage Sys Was Out of Calibr. Caused by Procedural Error.Instrument Racalibr & Satisfactorily Tested

Event date:
Report date:
3331979028R03 - NRC Website

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DOCKET NO.30-333 ATTACHMEf'T TO LER 79-028/03L-0 Page 1

of 1

Wh..le in a cold shutdown condition, during the conduct of Instrument Surveil-lance Procedure F-ISP-76 titled " Fire Protection System -- Carbon Dioxide Instrument Calibration," the level instrument associated with the ten ton carbon dioxide storage system was found out of calibration in a non-conservative manner.

The ref-erenced surveillance procedure was being conducted to satisfy the requirements of Technical Specification Appendix A, Table 4.12-2 and the level instrument was found to be indicating greater than the actual tank level.

Over the full range of the instrument, the greatest error was the 50% actual level which resulted in.an indi-cated level of 58%.

Since the event occurred during a cold shutdown condition and the actual tank level was approximately 85% compared to a Technical Specification minimum of 45%,

the event did not represent any hazard to the public health and safety.

The instrument was immediately recalibrated and tested, utilizing the ref-erenced surveillance procedure, with satisfactory results.

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