ML19263D761

LER 79-024/03L-0 on 790315:during Plant Heatup,Discovered That Temp Device at 175 Ft Elevation of Meteorological Monitoring Tower Was Inoperable.Cause Unknown.Temp Device Tested Satisfactorily & Returned to Svc

ML19263D761
Person / Time
Site:	Crystal River
Issue date:	04/02/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19263D756	List: ML19263D755 ML19263D761
References
LER-79-024-03L, LER-79-24-3L, NUDOCS 7904130232
Download: ML19263D761 (2)

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- \ SUPPLE'!ENTARY INFORMATION Report No.: 50-302/79-024/03L-0 Facility: Crystal River Unit 13 Report Date: 2 April 1979 Occurrence Date: 15 March 1979 Identificatis n of Occurrence:

Meteorological nonitoring instrumentation channels inoperable contrary to Technical Specification 3.3.3.4.

Conditions Prior to Occurrence:

Mode 5 operation, Plant E!c a t u p .

Description of Occurrence:

At 1940, during plant heatup, it was discovered that the temperature device at the 175' level of the meteorological monitoring tower was producing erratic indication. Instrumen-tation troubleshoot ing revealed no apparent cause and no cor-rective maintenance was required. Functional testing was performed through meteorological System Surveillance SP-137 from 17 March to 22 March with satisfactory results. The temperature device was returned to service at 0800 on 22 March 1979.

Designation of Apparent Cause:

tae cause of this event cannot be determined.

Analysis of Occurrence:

There was no hazard to the plant or general 511c as no gaseous releases were in progress.

Corrective Action Meteorological System Surveillance SP-157 was performed satis-factorily and the device returned to service at 0800 on 22 March 1979. No further corrective action required.

Failure Data:

Third occurrence reported for this device. Reference LER's 78-26 and 78-56.