ML19317G337

RO-77-36:on 770415,chemical Addition Valve CAV-2 & Makeup Valve MUV-258 Failed to Close During Performance of SP-370. Caused by Weak Closure Spring & Corroded & Dirty Contacts. Contacts Cleaned & Spring to Be Renewed

ML19317G337
Person / Time
Site:	Crystal River
Issue date:	05/09/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19317G332	List: ML19317G331 ML19317G337
References
NUDOCS 8002280941
Download: ML19317G337 (2)

Text

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CONTROL OLOC- l l l l l l [pttAst PRINT ALL RCOUIRED INFORM AT;.,

e LEENSEE i e NAME

• LCENSE EVENT LCENSE NUMDER TYPE TYPE

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lL l Cl Rl Pl 3l. l 0 l 0-l-l 0l 0l 0l 0l 0l-l 0l 0l l4l1 l1l1l1l l0 l3 l C /D 14 15 25 CU 30 31 32 CAftConY TYPE t ooCKET NUMDER EVENT oAfg REPORT oATE h CON'T l - l - l l Ll l0l5l0l-l0l3l0l2l l0 l4 l1 l 5l 7l 7l l 0 l5 l0 l9 l7 l7 7 6 57 60 59 GU G1 G8 GD 74 75  :

EVENT DESCRIPTION o l In Mode 1 operation performing SP-370, Containment Isolation Valves CAV-2 and MUV-258 7 09

@l failed to close contYary to Technical Specification 3.6.3.1. Redundant valves were avail-t 7 89 -

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@l able and operable. First occurrence of this type. CAV-2 will be restored operable on 7 09

@l 7 09 next outage. MUV-258 restored operable 15 April 1977.

@l 7 o9 (LER-77-36) pn,,,, t SYSTEM CAUSE COMPONENT COMPONEN T CODE CODE COMPONENT CoOE SUPPULH MANUFACTUACR VOLATON

@ l Sl Dl lE l 7 00 10 lVlA}LlVlElXl 12 l Al lR l3 l 4l 0l lNl ,

11 17 43 44 47 48 CAUSE DESCn:PTION 0 -

oo l MUV-258 inoperable due to dirty control contacts. Contacts cleaned and valve restored 7 89

@l 7 ao operable. CAV-2 closure spring not strong enough to effect closure. Will restore bl operable next scheduled outage.

FACILTTY METHoo oF

\ / STATUS  % POWER oTHER STATUS o4CoVERY Q

70 9 lEl 10 l__0 l 8 ) 6 l 12 13 l N/A l 44 d45 l DISCOVERY oESCRIPTON N/A 46 el ACTMTY CodTENT

• hfLEASED AMOUNT oF ACTMTY Q

7 0 D lZl ofW f lLE ASE l 10 11 N/A l 44 45 l

LOCATION oF RELEASE N/A 0;

P[nSONNEL EXPOSunES NUMDER TYPE oESCRIPflotJ

@ l0l0l0l Wl 13 7 89 11 12 N/A 6.

PERSONNEL INJunlES -

- iUMDE R DESCFhPTioN 7

1 0D 10l0l0l l N/A j 11 12 0;

OFFSITE CONSEQUENCES I

gg l N/A -

7 UU U:

LOSS On DAMAGE TO FACtllTY TYPE oESCA:PfloN

@Wl N/A 7 89 10 l la! .

PUBLtCITY 3l 7 00

~ N/A l

P.

l SulTIONAL 7 00 See attached FACTOnS Siipplewntary In fo rmat i on 8002 280 9W l,

~ i ,[, l 81 74 7 nu ,r l, Naur:

% tu.t cuan ;y I n,0Ne_ (.in) a66-4 nt

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pi SUPPLEMENTARY INFORMATION

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1. Report No: 50-302/77-36

2. Facility: Crystal River Unit #3

3. Report Date: 9 May 1977 1

4. Occurrence Date: 15 April 1977

5. Identification of occurrence:

Chemical Addition Valve CAV-2 and Make-Up Valve MUV-258 inoperable contrary to Technical Specification 3.6.3.1.

6. Conditions Prior to Occurrence:

Normal Mode 1 operation.

7. Description of Occurrence: -

At 0600 while performing the quarterly cycling of power-operated con-tainment isolation valves, Surveillance Procedure SP-370, CAV-2 and MUV-258 failed to close from the Control Center. Redundant isolation valves were available and operable. MUV-258 was restored operable within 4

[h g ,,/

hours. CAV-2 was manually isolated and will be repaired at the next scheduled outage. ,

]

8. Designation of Apparent Cause of Occurrence:

Corr.oded and dirty contacts for MUV-258. Closure spring for CAV-2 not  ;

strong enough to close valve.

)

9. Analysis of Occurrence:

There were no safety implications because of this occurrence as there were redundant valves available and operable.

1 10. Corrective Action:

Contacts .ior MUV-258 were cleaned and valve restored operable. Preventive Maintenar :e Program should prevent recurrence. Closure spring for CAV-2 will.be i inewed on next scheduled outage.

11. Failure Data:

This was a non-repetitive occurrence.

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