ML19289D094

LER 78-073/03L-0 on 781228:atmospheric Temp Indicator Rapidly Fluctuated +/-6 F.Cause Could Not Be Determined

ML19289D094
Person / Time
Site:	Crystal River
Issue date:	01/19/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19289D088	List: ML19289D087 ML19289D094
References
LER-78-073-03L, LER-78-73-3L, NUDOCS 7901290217
Download: ML19289D094 (2)

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SUPPLEMENTARY INFORMATION Report No.: 30-302/78-073/03L-0 Facility: Crystal River Unit #3 Report Date: 19 January 1979 Occurrence Date: 28 December 1978 Identification of Occurrence:

Thirty-three foot atmospheric temperature indicator inoperable contrary to Technical Specification 3.3.3.4.

Condieions Prior to Occurrence:

Mode 1 power operation (95%).

Description of Occurrence:

At 0705, during routine plant operation, it was observed that the thirty-three foot atmospheric temperature indicator was rapidly fluctuating plus/minus six degrees.

This anomaly ended af ter a short period of time. Follow-up investigation by maintenance personnel revealed no system abnormalities. Thirty-three foot temperature indicating system declared operable at 0955, 28 December 1978.

Designation of Apparent Cause:

The cause of this anomaly cannot b3 determined. The thirty-three foot tempe/ature probe was checked with test thermometer. Control Room indication and test thermometer readings were within one tenth of a degree and no fluctuations or system abnormalities were observed.

Analysis of Occurrence:

There was no hazard to the health and safety of the plant or general public as no gas releases were in progress during the period of inoperability.

Corrective Action:

No corrective action deemed necessary as the cause of this anomaly could rut be identified and the event has not recurred.

Failure Data:

Seven previous occurrences reported, but first occurrence of this type.

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