ML19317G347

LER 78-014/03L-0:on 780210,chemical Addition Valves CAV 1 & 2 Failed to Close on Completion of Pressurizer Steam Space Sampling.Caused by Incorrect Torque Switch Setting of Valve CAV-1.Operability restored.CAV-2 Corrective Action Pending

ML19317G347
Person / Time
Site:	Crystal River
Issue date:	03/03/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19317G343	List: ML19317G342 ML19317G347
References
LER-78-014-03L, LER-78-14-3L, NUDOCS 8002280948
Download: ML19317G347 (2)

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(VENT otSCRIPTICN ANo DRoEASLt CO?.$1CW[* Cl3 i ,,, gin Mode 1 operation, upon compi ett of pressur'. er staan space sampling, ,

rTm I hemical C Addition Valves (CAV-L and 2) failed to close rendering a. conditionr l o ! . i leonersrv to Tech Seac 3.6.3.1. %dtmr8ma cy VA. Second occurrence of this I

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s i io i IThe cause of this event has been deter:nised to be an incorrect torque switet;

, , , , , , setting; of valve CA7-L Operator maintenance restored operability of CA7-L)

, , , ,.,No further corrective action deemed necessary. Operability of, and correctyve

. , , , ,, , action for, CAV-Z will be accomplished during- 1:npending outage. ,

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SUPPLEMENTARI INFORMATICtf f

iport No.: 50-302 /78-014-03L-0 ,;

2. Facility: Crystal River Unic #3

3. Report Date: 3 March 1978

4. Occurrance Date: 10 February 1978

5. Identification of Occurrence: Containment Isolation Valves CAV-l&2 inoperable contrary to l Tech Spec 3.6.3.1.

6. Conditions Prior to Occurrence:

h~i e 1 operation.

7. Description of Occurrence:

At 2200 upon completion of' pressurizar steam space sampling, Chemical ,ddition Valves (C17-L and CAV-2) failed to close. Action Statement (b) of Tech Spec 3.6.3.1 was

.cutered. After approrf marely 20 minutes of attempts to close CAV-L and CAV-2 frois the Control Cancer, the valves closed. and the Action Statemenc was satisfied. The .-

valves were then cyclei with the following isolation times: CAV-L ,19 seconds, CA7-Z, ',

8 seconds upon pressure equaliration. Maintenance Voric Requests 0-6168 and 0-6187 -

, vera initiated at this time. Operability of CAV-L was restored on 21 February L978.

Maintanance on CA7-1 will be accomplished during the impending outage and operabilit7 will be restored.

r asignation of Apparent Cause:

Incorrect torqua switch setting of CA7-L operator. Upon checking CA7-Z, it was deter-mined that the process tubing lines were installed reversed.

9. Analysis of Occurrence:

The safeer implications. of this occurrence are **=T as the pressurizar sample lines re-enter the Reactor CJolant Systene via. the Makeup tank, composing a closed sampling

.systen.

10. Corrective Action:

No corrective action required on CAV-L as maintenance restored operability. Correceive action for CAV-1 will be accomplished by Maintenance Work Request I-2406 during the.

impending outage.

11. Failure Deta:

This is the first time CAV-1 has failed to close and the second occurrence of CAV-1 to close as reported by LER 77-36.

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