ML18139A529

LER 80-019/03L-0:on 800822,during Operation Trip Valve TV- SS-206B Would Not Stay Closed When Actuated from Control Room.Caused by Misadjusted Limit Switch.Valve Isolated & Position Limit Switch Readjusted

ML18139A529
Person / Time
Site:	Surry
Issue date:	09/19/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A527	List: ML18139A526 ML18139A528 ML18139A529 ML18139A530
References
LER-80-019-03L-03, LER-80-19-3L-3, NUDOCS 8009240471
Download: ML18139A529 (2)

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!With the Unit at power, TV-SS-206B would not remain closed when actuated !Ii]] from the control room. Isolation of the sample system was available by another valve, ~* I therefore the health and safety of the general public were not affected.

This event C§:II] ~s contrary to Technical Spe,cification 3 .8. A. ( 1) and report ab le per Technical filD cation 6.6.2.b.(l)

[Iill 8 9 [I:ill 7 S SYSTEM CODE IP IB I@ 9 10 C\ U,R :;o c*VENT YE;>.R \:.!.) REP<?~' I 8 I O I NUMo::R 21 22 ACTION FUTURE TAK::N ACTION

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[CO] I was to close the isolation valve down'stream of the trip valve. The isolation valve [LI}] remained closed until the position limit switch to TV-SS-206B was adjusted.

DE] a 9 FACILITY STATUS , % POWEF, OTHER S7ATUS L!J@ IO I 6 IO l@l,___NA

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_ (804) 357-3184 ?WQ~I::: --------------

. . .. ATTACHMENT 1 SURRY POWER DOCK.ET NO: REPORT NO: EVENT DATE: __ -_-_-_-__ --e STATION, UNIT 2 50-:-281 80-019-03L-O 08-22-80 TITLE OF EVENT: TRIP VALVE Tv~ss-206B INOPERABLE

1. Des*cription of Event: With the Unit at power, TV-SS-206B.

would not remain' closed when actuated from the control room. This event is contrary to Technical Specification 3.8.A.l. and_reportable per Technical Specification 6.6.2.b.{1)

2. Probable Consequences of Event: Assuming total inoperability of the valve, the health and safety of the general public would not have been affected since automatic sample system isolation was available by series valve TV-,SS-206A located side of containment.

3. Cause of Event: The failure_of TV-SS-206B

.. to remain ciosed was due to a misadjusted limit switch. 4. Innnediate Corrective Action: The immediate corrective action was to -isolate TV-SS-206B, by a manual val \re down stream. 5. Scheduled Corrective Action: The-position limit switch to TV-SS-206B was readjusted.

6. Action Taken to Prevent Recurrence:

None 7. Generic Implications:

None