05000302/LER-1980-053-03, /03L-0:on 801208 & 09,containment Isolation Valve CAV-3 Would Not Close After Sampling Pressurizer Water Space.Caused by Inadequate Closing Torque & Faulty Torque Switch.Valve Stem Lubricated.Torque Switch Replaced

/03L-0:on 801208 & 09,containment Isolation Valve CAV-3 Would Not Close After Sampling Pressurizer Water Space.Caused by Inadequate Closing Torque & Faulty Torque Switch.Valve Stem Lubricated.Torque Switch Replaced

ML20002C202
Person / Time
Site:	Crystal River
Issue date:	01/05/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20002C198	List: 05000302/LER-1980-053, Forwards LER 80-053/03L-0 05000302/LER-1980-053-03, /03L-0:on 801208 & 09,containment Isolation Valve CAV-3 Would Not Close After Sampling Pressurizer Water Space.Caused by Inadequate Closing Torque & Faulty Torque Switch.Valve Stem Lubricated.Torque Switch Replaced
References
LER-80-053-03L, LER-80-53-3L, NUDOCS 8101090609
Download: ML20002C202 (2)

LER-1980-053, /03L-0:on 801208 & 09,containment Isolation Valve CAV-3 Would Not Close After Sampling Pressurizer Water Space.Caused by Inadequate Closing Torque & Faulty Torque Switch.Valve Stem Lubricated.Torque Switch Replaced

Event date:
Report date:
3021980053R03 - NRC Website

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t SUPPLEMENTARY INFORMATION Report No.:

50-302/80-053/03L-0 Facility:

Crystal River Unit #3 Report Date:

January 5,1981 Occurrence Date:

December 8, 1980 Identification of Occurrence:

Failure to have containment isolation valves operable contrary to Technical Specification 3.6.3.1.

Conditions Prior to Occurrence:

Mode 3 (hot standby 0%)

Description of Occurrence:

At 0950 on December 8,1980 after sampling the pressurizer water space, it was discovered that containment isolation valve CAV-3 would not close. Manual isolation valve CAV-128 was closed and maintenance was initiated. Operability was restored at 1230 December 8, 1980. At 2210 on December 9, 1980 CAV-3 again failed to close.

CAV-2 was closed and deactivated. Maintenance was initiated. Operability was restored at 2118 on December 11, 1980.

Designation of Apparent Cause:

The cause of the first event was attributed to inadequate clos-ing torque. The cause of the second ev?nt was attributed to a faulty torque switch.

Analysis of Occurrence:

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

Corrective Action

i The valve stem for CAV-3 was lubricated after the first event and the functional test was satisfactory. After the second event the torque switch was replaced and the valve was satis-factorily tested. No further corrective action required.

Failure Data:

These are the fourth and fifth occurrences for CAV-3 and this is the thirtieth event reported under this specification.

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