05000339/LER-1980-003-03, /03L-0:on 800528,2H Diesel Generator Frequency & Voltage Response Was Not Verified Every 8-h,contrary to Tech Spec.Caused by Faulty Lead on Monitoring Instrumentation. Offsite Power Sources Verified & Found Acceptable

/03L-0:on 800528,2H Diesel Generator Frequency & Voltage Response Was Not Verified Every 8-h,contrary to Tech Spec.Caused by Faulty Lead on Monitoring Instrumentation. Offsite Power Sources Verified & Found Acceptable

ML19318B634
Person / Time
Site:	North Anna
Issue date:	06/20/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318B635	List: 05000339/LER-1980-003, Forwards LER 80-003/03L-0 05000339/LER-1980-003-03, /03L-0:on 800528,2H Diesel Generator Frequency & Voltage Response Was Not Verified Every 8-h,contrary to Tech Spec.Caused by Faulty Lead on Monitoring Instrumentation. Offsite Power Sources Verified & Found Acceptable
References
LER-80-003-03L-03, LER-80-3-3L-3, NUDOCS 8006270241
Download: ML19318B634 (2)

LER-1980-003, /03L-0:on 800528,2H Diesel Generator Frequency & Voltage Response Was Not Verified Every 8-h,contrary to Tech Spec.Caused by Faulty Lead on Monitoring Instrumentation. Offsite Power Sources Verified & Found Acceptable

Event date:
Report date:
3391980003R03 - NRC Website

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

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

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On May 28, 1980, with Unit 2 in Hot Standby and "2J" diesel generator inoper- /

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able for preventative maintenance, the frequency and voltage response of the

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"2H" diesel generator was not verified every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> as required by the action /

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statement of T.S. 3.8.1.1 and reportable by T.S. 6.9.1.9.c.

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safety of the public were not affected since both offsite power sources were

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available.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

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The "2H" diesel generator was started and accelerated to 900 RPM as required

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but due to a faulty lead on monitoring instrumentation, the frequency and

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voltage response was not verified.

Both offsite power sources were verified

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to be acceptable. The "2J" diesel generator was returned from maintenance and /

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satisfactorily tested.

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FACILITY METHOD OF

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NAME OF PREPARER U. R. CARTWRIGHT PHONE (703) 894-5151

Virginia Electric and Power Company North Anna Power Station, Unit #2

Attachment:

Page 1 of 1 Docket No. 50-339 Report No. LER 80-003/03L-0

Description of Event

At 1332 on May 28, 1980, with Unit 2 in Hot Standby and the "2J" diesel generator removed from service for preventative maintenance, the "2H" diesel was started to prove operability as required by T.S. 3.8.1.1.

The diesel successfully started and accelerated to 900 RPM in less than 10 seconds, however, the frequency and voltage response of the diesel generator were not verified.

This is reportable by T.S. 6.9.1.9.c.

Prchable Consequences of Occurrence The health and safety of the public were not affected since both offsite power sources were available and the unit was in Hot Standby prior to initial criticality.

Cause of Event

The frequency and voltage response of the "2H" diesel generator was not veriried due to a faulty lead on monitoring instrumentation.

The "2H" diesel was not retested immediately since T.S. 4.8.1.1.2.a.4 requires testing the diesel generator at ambient conditions. After starting, the "2H" diesel generator was no longer at ambient conditions.

Immediate Corrective Action

Both offsite power sources were verified to be available. The faulty lead on the instrumentation was found and repaired.

The "2J" diesel generator was returned from preventative maintenance at 0333 on May 29, 1980, and satisfactorily tested.

Scheduled Corrective Action None scheduled.

Actions Taken to Prevent Recurrence None required.

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