05000302/LER-1981-004-03, /03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker

/03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker

ML19351F914
Person / Time
Site:	Crystal River
Issue date:	02/16/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351F913	List: 05000302/LER-1981-004, Forwards LER 81-004/03L-0 05000302/LER-1981-004-03, /03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker
References
LER-81-004-03L, LER-81-4-3L, NUDOCS 8102200478
Download: ML19351F914 (2)

LER-1981-004, /03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker

Event date:
Report date:
3021981004R03 - NRC Website

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j SUPPLEMENTARY INFORMATf0N 1

Report No.:

50-302/81-004/03L-0 Facility:

Crystal River Unit 3 Report Date:

16 Fecruary 1981 Occurrence Date:

January 19, 1981 Identification of Occurrence:

Inoperable position indication for containment isolation valves contrary to Technical Specification 3.6.3.1.

Conditions Prior to Occurrence:

Mode 1 power operation.

Description of Occurrence:

At 0113 af ter routine sampling of the Reacter Coolant System, it was discovered that containment isolation valve CAV-2 indicated both open and closed.

CAV-1, 3, and 126 were closed and deactiva-ted. Maintenance was performed and operability was restored at 0600. At 0648 while restoring CAV-126 to service it was aiscovered that the cloeed position indication would not actuate. CAV-2 was closed and deactivated; CAV-133 was closed. Maintenance was perfcrmed and operability was restored at 1327.

Designation of Apparent Cause:

The cause of CAV-2 indication failure is unknown at this time.

CAV-126 indication failure was caused by defective breaker in the main power supply to the valve.

Analysis of Occurrence:

There was no effect upon the health or safety of the general public.

I Corrective Actiori:

An engineering investigation is in progress to evaluate problems associated with CAV-2. The system breaker for CAV-126 was re-placed and a functional test for CAV-126 was satisfactory. The engineering investigation for CAV-2 is REI 80-1-11.

Failure Data:

This was the sixth occurrence for CAV-2, the second occurrence for CAV-126, and the thirty second event reported under this Specification.

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