05000338/LER-1980-051-03, /03L-0:on 800523,w/unit at Hot Standby,Fuel Oil Vol in 1J Emergency Diesel Generator Day Tank Found W/Less than Min Vol of 750 Gallons.Caused by Neither Fuel Oil Transfer Pump Refilling Day Tank

/03L-0:on 800523,w/unit at Hot Standby,Fuel Oil Vol in 1J Emergency Diesel Generator Day Tank Found W/Less than Min Vol of 750 Gallons.Caused by Neither Fuel Oil Transfer Pump Refilling Day Tank

ML19318A633
Person / Time
Site:	North Anna
Issue date:	06/19/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318A629	List: 05000338/LER-1980-051, Forwards LER 80-051/03L-0 05000338/LER-1980-051-03, /03L-0:on 800523,w/unit at Hot Standby,Fuel Oil Vol in 1J Emergency Diesel Generator Day Tank Found W/Less than Min Vol of 750 Gallons.Caused by Neither Fuel Oil Transfer Pump Refilling Day Tank
References
LER-80-051-03L, LER-80-51-3L, NUDOCS 8006230524
Download: ML19318A633 (2)

LER-1980-051, /03L-0:on 800523,w/unit at Hot Standby,Fuel Oil Vol in 1J Emergency Diesel Generator Day Tank Found W/Less than Min Vol of 750 Gallons.Caused by Neither Fuel Oil Transfer Pump Refilling Day Tank

Event date:
Report date:
3381980051R03 - NRC Website

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U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK / / / / / / / (1)

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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/V/A/N/A/S/1/ (2)

/0/0/-/0/0/0/0/0/-/0/0/ (3)

/4/1/1/1/1 (4)

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LICENSEE CODE LICENSE NUMBER LICENSE TYPE CAT

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/L/ (6)

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E DOCKET NUMBER EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (10)

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On May 23, 1980, with Unit I at Hot Standby, the fuel oil volume in the IJ

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emergency diesel generator day tank was found to be less than the minimum

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volume of 750 gallons as required by T.S. 3.8.1.1.b.1.

Also a valve in the

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fuel oil line to the IJ day tank was found to be closed. This is reportable

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by T.S. 6.9.1.9.b.

Since effsite power was available, the health and safety

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of the public were not affected.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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/E/3/ (11) /A/ (12) /B/ (13) /E/N/G/I/N/E/ (14) g/ (15)

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

CODE TYPE NO.

(17) REPORT NUMBER

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ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

/X/ (18) /Z/ (19) /Z/ (20) /Z/ (21) /0/0/0/0/ (22) /][/ (23) /N/ (24) /A/ (25) /C/4/7/0/ (26)

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

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The day tank level was low because neither of the fuel oil transfer pumps were /

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refilling the day tank and fuel oil was being used by the IJ diesel generator /

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during periodic testing. The fuel oil transfer pumps were restored to operable /

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status and the day tank was refilled.

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FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION (32)

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/B/ (31)

/ OPERATOR OBSERVATION /

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/G/ (28)

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NA ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35)

LOCATION OF lttLEASE (36)

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/Z[ (33)

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NA

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NA

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

/1/7/ /0/0/0/ (37) /Z/ (38) /

NA

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PERSONNEL INJURIES NUMBER DESCRIPTION (41)

/1/8/ /0/0/0/ (40) /

NA

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LOSS OF OR DAMAGE TO FACILITY (43)

TYPE

DESCRIPTION

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NA

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PUBLICITY ISSUED DESCRIPTION (45)

NRC USE ONLY l

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NA

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W. R. CAR WRIGHT PHONE (703) 894-5151 8 0062 3 052Y NAME OF MPARER i

e.

.e Virginia Electric and Power Company North Anna Power Station, Unit #1

Attachment:

' Docket No. 50-338 Report No. LER 80-051/03L-0

Description of Event

.On.May 23, 1980, with Unit I at Hot Standby, the "1J" emergency diesel generator was being tested to prove operability following pre-ventative maintenance.. Prior to completion of the periodic test, 1-PT-82B,Lon.the diesel, the starting of a Reactor Coolant Pump caused the

- emergency bus to be separated from the normal power supply and approxi-mately. ten minutes later an inadvertant Safety Injection occurred. See LER 80-47 for details. During completion of the 1-PT-82B, it was found that the "1J" day tank level had decreased to approximately 425 gallons which is below the minimum required level of 750 gallons. The fuel oil transfer pumps should have automatically filled the emergency generator day tank but did not.

Probable Consequences of Occurrence The health and safety of the public were not affected since both offsite sources were available.

Cause of Event

The emergency. diesel-generator day tank did not contain 750 gallons because neither of the fuel oil transfer pumps refilled the tank either while the emergency diesel was running or after it was secured. This low level was discovered while the periodic test, 1-PT-82B, was being completed.' The periodic test also found that neither fuel oil transfer pump would fill the day tank. The breaker for one of the fuel oil transfer pumps,1-EG-P-1JA, was found to be tripped and required re-setting. The suction valve to the other transfer pump, 1-EG-P-1JB was found to be closed. The cause of the breaker for IJA being tripped

- could not be determined. The suction valve for IJB, 1-EG-293, was apparently left closed following maintenance on the diesel generator although the tagging report indicated that the valve had been reopened.

Immediate 'orrective Action The suction valve for the IJB f al oil transfer pump was opened and the fuel oil day tank was refilled. The breaker for the IJA fuel oil transfer pump was reset at the breaker panel and IJA pump current was measured and found to be normal.

Scheduled Corrective Action Since preventative maintenance had been performed on the diesel and the problems were discovered during periodic testing which was to return the diesel to operable status, no. future corrective action is scheduled.

This incident and the importance of strict adherence to tagging procedures 'and other administrative controls will be discussed with all operations personnel, e

Actions Taken to Prevent Recurrence l

The incident was discussed with the operator responsible for clearing the tagging record following maintenance.

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