ML19312D198

LER 80-026/03L-0:on 800217,w/reactor Operating at 100% Power,Casing Cooling Supply Valve MOV-RS100B Failed to Open from Control Room During Quarterly Valve Inservice Insp Test.Cause Unknown.Valve Was Manually Opened & Tested

ML19312D198
Person / Time
Site:	North Anna
Issue date:	03/18/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19312D197	List: ML19312D196 ML19312D198
References
LER-80-026-03L, LER-80-26-3L, NUDOCS 8003210461
Download: ML19312D198 (2)

Text

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LICENSEE EVENT REPORT

'O CONTROL BLOCK: l l l 'l l l lh (PLEASE PRINT OR TYPE alt. REQUIRED INFORMATION) i e lIIil l8 Vl 7 9

?Al Nl Al Sl 1l@l LICENSEE CODE 14 IS 0l 0l -l 0lLICENSE 0l 0l'0l NUMBER 0l -l 0l 0l@l 25 26 4l 1l 1l 1l 1l@l$7 CAT LICENSE TYPE JO l

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" T l0l11 3$n"C lL @l0 l5 DOCKET l0 l0NUM8ERl0 l3 l3 l868 @l 0l 2l 1l 718l Ol@l 013l 75 1l 818l nl@ 80 7 8 60 64 6'3 EVENT DATE F4 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h n O 121 l On February 17, 1980, with the reactor operatine nt 100% power. caning enoling annnly 1 10 l 31 l valve MOV-RS100B failed to open from the control room during the perforrence of the i O e l quarterly valve inservice inspection test. Since "A" casing cooline subsystem romn indl l 0 l s i l operable and MOV-RS100B was restored to operable status within the tilne allowance of I l

l O s l the T.S. 3.6.2.2 Action Statement, the health and safety of the general nublic were nnk l 0 l 7 l l af fected. H is event is reportable pursuant to T.S. 6.9.1.9.b. I O s l )

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,_ SEQUENTIAL OCCURRENCE REPORT REVISION LE R/RO EVENT YEAR REPORT NO. CODE TYPE N O.

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44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g JOV-RS100B failed to open electrically from its respective control switch. Cause I y l unknown. 'Ihe valve was manually opened and then satisfactorily cycled several e f ma <= I

, 7 l using the valve operator motor. l 1 3 l l t 4 1 l 7 8 o 8o ST S  % POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION 1 s J@ l 1 l 0 l 0 l@l NA l l_Bj@l Surveillance Test l A TIVITY CO TENT ftELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA 7

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 1 7 l0l0l0l@ ] @l

_l PERSONNE L lNJU IES NUMBER DESCRIP TION 7.

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LO S OF OR DAMAGE TO FACILITY TYJE- DESCRIPTION 8 I Bl@l 7 8 9 10 NA 80 l

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U Virginia Electric' and Power Company

Attachment:

Page 1 of 1 North Anna Power Station, Unit #1 Docket No. 50-338

-FMport No. LER 80-26/03L-0 Description of Event On February 17,'1980, during the performance of the quarterly valve inservice inspection test, recirculation spray pump casing cooling supply valve MOV-RS100B failed to open from the control room selector switch render-ing the "B" casing cooling subsystem inoperable.- This event is contrary to T.S. 3.6. 2.b. and reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence The -casing cooling system is provided to supply cold water to the suction piping of the outside recirculation spray pumps for the purpose of increasing the pump net positive suction head. Because ' the "A" casing cooling subsystem remained operable and MOV-RS100B was restored to operable status within the 7 day time limit allowed by the ACTION Statement of T.S. 3.6.2.2, the health and safety of the general public were not affected. There are no generic implications associated with this occurrence.

Cause of Event t Exact cause is unknown and believed to be a random event.

Immediate Corrective Action The valve was manually opened and then satisfactorily cycled several times from the control room.

Scheduled Corrective Action Further investigation will be conducted. The normal periodic surveillance test will be monitored for additional failure of the valve.

Actions Taken to Prevent Recurrence

. No actions are required at this time.

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