05000339/LER-1980-023-03, /03L-0:on 800610,A ECCS Subsys Was Rendered Inoperable by Isolation of a Lhsi Pump.Caused by Need to Repair Leaking Water Fitting.Seal Water Fittings Reinstalled & Pump Returned to Svc

/03L-0:on 800610,A ECCS Subsys Was Rendered Inoperable by Isolation of a Lhsi Pump.Caused by Need to Repair Leaking Water Fitting.Seal Water Fittings Reinstalled & Pump Returned to Svc

ML19320C085
Person / Time
Site:	North Anna
Issue date:	07/07/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19320C082	List: 05000339/LER-1980-023, Forwards LER 80-023/03L-0 05000339/LER-1980-023-03, /03L-0:on 800610,A ECCS Subsys Was Rendered Inoperable by Isolation of a Lhsi Pump.Caused by Need to Repair Leaking Water Fitting.Seal Water Fittings Reinstalled & Pump Returned to Svc
References
LER-80-023-03L-01, LER-80-23-3L-1, NUDOCS 8007150815
Download: ML19320C085 (2)

LER-1980-023, /03L-0:on 800610,A ECCS Subsys Was Rendered Inoperable by Isolation of a Lhsi Pump.Caused by Need to Repair Leaking Water Fitting.Seal Water Fittings Reinstalled & Pump Returned to Svc

Event date:
Report date:
3391980023R03 - NRC Website

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a U.S. NUCLEAR REGULATORY COMMISSION

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LICENSEE EVENT REPORT CONTROL BLOCK / / / / / / / (1)

(PLEASE PRINT OR TYPE ALL REQUIRED IhTORMATION)

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LICENSEE CODE LICELoE NUMBER LICENSE TYPE CAT

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E DOCKET NUMBER EVENT 1; ATE REPORT DATE

- EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (10)

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On June 10, 1980, with the unit in Mode 3, the "A" ECCS subsystem was rendered /

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inoperable by the isolation of the "A" LHSI pump for maintenance purposes.

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Because the redundant ECCS subsystem remained available and the "A" LHSI pump /

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was repaired and' returned to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, the health and

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safety of the general public were not affected. This event is reportable

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pursuant to T.S. 6.9.1.9.b.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE

. CODE t SUBCODE COMPONENT CODE SUBCODE SUBCODE

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SEQUENTIAL OCCURRENCE REPORT REVISION LER/R0 EVENT YEAR REPORT NO.

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ACTION FUTURE E1FECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP.

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The LHSI pump was isolated to allow for repair of a leaking seal water

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fitting. To correct the leak, the pipe nipples to the pump seal were removed /

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and thoroughly cleaned and dressed. The seal water fittings were then rein- _/

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stalled and the pump was restored to operable status.

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FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCO E RY DESCR M ION (32)

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/ SCHEDULED PUMP SEAL REPAIR /

ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35)

LOCATION OF RELEASE (36)

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

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PERSONNEL INJURIES

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PUBLICITY ISSUED

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NRC USE ONLY

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NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151 7007150875-g

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Virginia Electric and Power Company North Anna Power Station, Unit #2 Attachment: Page 1 of I Docket No. 50-339 Report No. LER 80-023/03L-0

Description of Event

On June 10, 1980, with the unit in a hot standby condition, the "A"

ECCS' subsystem was rendered inopetable due to isolation of the "A" Low Head Safety Injection pump for scheduled maintenance. This event is contrary to T.S. 3.5.2 and reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence The consequences of this event were minimal.because the redundant ECCS subsystem ("B" Train) remained available for operation if required and the "A" ECCS subsystem was restored to operable status within the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> ACTION statement. As a result, the health and safety of the general public were not affected.

Cause of Event

The "A" Low Head Safety Injection pump (2-SI-P-1A) was isolated to allow.a leaking seal water fitting to be repaired.

Immediate Corrective Action

The pipe nipples to the pump seal were removed and thoroughly cleaned and dressed. The seal water pipe fittings were then reconnected using new. flex gaskets where necessary and the pump was returned to an operable condition.

Scheduled Corrective Action No scheduled corrective action is required.

Actions Taken to Prevent Recurrence No further actions are required.

Generic Implications There are no generic implications associated with this event.