Morning Report for October 1, 2003

Headquarters Daily Report

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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