United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for October 1, 2003

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Part 21 - Failure of a Safety-Related K-Line Circuit Breaker

Licensee/Facility:

SOUTH CAROLINA ELECTRIC & GAS CO.
SUMMER
COLUMBIA, South Carolina
Dockets: 05000395

License No:
Notification:

MR Number: H-2003-0026
Date: 06/19/2003


Source Document: Letter

Reviewer: FOSTER, JACK W

Discussion:

On April 17, 2003, during surveillance testing, Virgil C. Summer (VCSNS) experienced a failure of a Safety-Related K-Line circuit breaker. Preliminary trouble-shooting by the licensee has determined that the apparent cause of the "B" Reactor Makeup Water Pump switchgear failure to close on demand is the high number of cycles experienced by this breaker. To confirm the preliminary findings, VCSNS retumed the breaker to the manufacturer Asea Brown Boveri (ABB) where a detailed failure report and complete overhaul are being performed.

A final report from the licensee on this 10 CFR Part 21 evaluation is expected to be submitted within 30 days of receipt of the detailed failure report from the vendor. Information regarding this Part 21 can be found in ADAMS ML031690399 or on the web at:
http://www.nrc.gov/reading-rm/doc-collections/event-status/part21/2003/200301800.pdf.

Accession Numbers:

Accession No Accession Date
ML031690399 06/11/2003

Contacts:

Name Office Abbrev Phone No E-Mail
FOSTER, JACK W NRR (301) 415-3647 JWF@nrc.gov
Page Last Reviewed/Updated Thursday, March 29, 2012