ML19275A932

LER 79-089/03L-0:on 790922,remote Shutdown Indicator for Decay Heat Cooler Outlet Temp Failed.Caused by Failed Resistance Temp Detector DH-2-TE.Replaced W/Spare & Returned to Svc

ML19275A932
Person / Time
Site:	Crystal River
Issue date:	10/15/1979
From:	FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19275A928	List: ML19275A927 ML19275A932
References
LER-79-089-03L, LER-79-89-3L, NUDOCS 7910230549
Download: ML19275A932 (2)

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Decay Heat cooler outlet temperature, DH-39-TT had failed. This crearM ,n f o 3 No effect upon the plant

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,ic lThe cause of this event is attributed to failed RTD DH-2-TE. The RTD was re- I placed with a spare and returned to service at 1330.on 28 September 1979. No ,

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1 SUPPLEMENTARY INFORMATION Report No.: 50-302/79-089/03L-0 Facility: Crystal River Unit #3 Report Date: 15 October 1979 Occurrence Date: 22 September 1979 Identification of Occurrence:

"A" decay heat cooler outlet temperature indicator inoperable contrary to Technical Specification 3.3.3.5.

Conditions Prior to Occurrence:

Mode 1 power operation (100%).

Description of Occurrence:

At 0230 it was reported that the remote shutdown indicator for "A" decay heat cooler outlet temperature, DH-39-TI had failed. Further investiga-tion revealed that RID DH-2-TE had failed. Maintenance restored opera-bility and the indicator was returned to service at 1330 on 28 September 1979.

Designation of Apparent Cause:

I e cause of this event is attributed to a failed RTD, DH-2-TE.

Analysis of Occurrence:

No effect upon the plant or general public.

Corrective Action:

The RTD was replaced with a spare and returned to service. No further corrective action deemed necessary.

Failure Data:

This is the second occurrence of this type reported. Reference LER 79-14.

/rc 1188 303