05000335/LER-1980-006-03, /03L-0:on 800202,during Periodic Exercise of Containment Isolation Valves,Normally Closed Valves V-5201 & V-5204 Could Not Be Shut.Caused by Crystalline Boric Acid Deposits Caked on Valves.Valves Freed & Exercised

/03L-0:on 800202,during Periodic Exercise of Containment Isolation Valves,Normally Closed Valves V-5201 & V-5204 Could Not Be Shut.Caused by Crystalline Boric Acid Deposits Caked on Valves.Valves Freed & Exercised

ML17266A151
Person / Time
Site:	Saint Lucie
Issue date:	03/03/1980
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17207A887	List: 05000335/LER-1980-006, Forwards LER 80-006/03L-0 05000335/LER-1980-006-03, /03L-0:on 800202,during Periodic Exercise of Containment Isolation Valves,Normally Closed Valves V-5201 & V-5204 Could Not Be Shut.Caused by Crystalline Boric Acid Deposits Caked on Valves.Valves Freed & Exercised
References
LER-80-006-03L, LER-80-6-3L, NUDOCS 8003170438
Download: ML17266A151 (2)

LER-1980-006, /03L-0:on 800202,during Periodic Exercise of Containment Isolation Valves,Normally Closed Valves V-5201 & V-5204 Could Not Be Shut.Caused by Crystalline Boric Acid Deposits Caked on Valves.Valves Freed & Exercised

Event date:
Report date:
3351980006R03 - NRC Website

text

NRC FORM SBB IT 21 I LlCENSEE EVENT REPORT UiS NUCI.BAR REGULATORY COMMISSION

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~oz Durin eriodic exercise of containment isolation valves AP 0010125 it

~03 was found that normal 1 cl osed val ves V-5201 and V-5204 coul d not be shut.

The enetration was isolated b

shuttin manual valve V-05003.

The valves

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V-5201 was a ain

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f'ound to be stuck on 2-8-80.

The above corrective action was erformed

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a ain'and no further roblems have been noted.

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V-5201 and V-5204 are containment isolation valves for the ressurizer sur e line 'sam le i in The valves had become caked with cr stalline boric acid de osits which limited their "shut" stroke.

The valves were freed, exercised and laced back into service.

No further roblems have been noted; The valves will be re aired durin S rin refuelin Q

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Reportable Occurrence 335-80-6 Licensee Event Report Page Two 8

Additional Correct'ive Action Further maintenance is planned for the Spring refueling to help preclude recurrence of boric acid deposits restricting operation of V-5201 and V-5204.