ML19345D983

LER 80-048/03L-0:on 801116 & 18,containment Isolation Valve CAV-3 Did Not Close While Sampling Pressurizer Water Space. Caused by Inadequate Closing Torque.Valve Closed,Deactivated & Maint Performed

ML19345D983
Person / Time
Site:	Crystal River
Issue date:	12/16/1980
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345D981	List: ML19345D980 ML19345D983
References
LER-80-048-03L, LER-80-48-3L, NUDOCS 8012220312
Download: ML19345D983 (2)

Text

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. to .21 (tion valve CAV-3 would'not close while sampling the pressurizer water space. These 9

ro I levents were contrary to T.S. 3.6.3.1. Ineachcase,CAV-2wasclosedanddeactivatep ,

,, ,,, ;and maintenance was initiated. There was no effect upon the health or safety of

,,,,, ,the general public. These are the second and third occurrences for CAV-3, and this ,

, ,,; [is the twenty-eighth report under this Specification. ,

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,, ,0, caus2 --~ner:en of these 2n:::ansenvs events is attri 2: mess @buted to inadequate closing torque. The vaive ,

(Thr tieij [ stem was lubricated; the valve was functionally checked. Operability was restored i at 0115 November 17, 1980. The torque switch setting was increased; the valve i Li_L;.J l

g,,,,  ; was functionally checked; operability was restored at 1620 Nov.19,1980. No ,

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'Name of Preparer: ((, ,,e ,g gcC 795-486 O

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No SUPPLEMENTARY INFORMATION Report No.: 50-302/80-048/03L-0 j Facility: Crystal River Unit #3 Report Date: 16 December 1980 Occurrence Date: 16 November 1980 Identification of Occurrence:

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

Conditions Prior to Occurrence:

Mode 1 power operation (100%).

l I Description of Occurrence:

At 1837 on November 16, 1980 after sampling the pressurizer water space, it was discovered that containment isolation j valve CAV-3 would not close. CAV-2 was closed and deactivated and maintenance was initiated. Operability was restored at 0115 November 17, 1980. At 0950 November 18,1980 CAV-3

' again failed to Close. CAV-2 was again closed and deactivated and additional maintenance was initiated. Operability was i

restored at 1620 November 19, 1980.

Designation of Apparent Cause:

The cause of these events is attributed to inadequate closing torque, i Analysis of Occurrence:

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

!. public.

Corrective Action

, 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 setting was increased. No further I corrective action required.

Failure Data:

These are the second and third occurrences for CAV-3,and this l is the twenty-eighth event reported under this Specification.

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