05000302/LER-1979-024-03, /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

/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: 05000302/LER-1979-024, Forwards LER 79-024/03L-0 05000302/LER-1979-024-03, /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
References
LER-79-024-03L, LER-79-24-3L, NUDOCS 7904130232
Download: ML19263D761 (2)

LER-1979-024, /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

Event date:
Report date:
3021979024R03 - NRC Website

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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 of Occurrence:

n 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.