United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for November 10, 2004

Headquarters Daily Report

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REGION II

FAILURE OF HARRIS FEEDWATER ISOLATION VALVE DURING REFUELING OUTAGE STARTUP

Licensee/Facility:

CAROLINA POWER & LIGHT CO.
Harris 1
RALEIGH, North Carolina
Dockets: 05000400
[1] W-3-LP
License No:
Notification:

MR Number: 2-2004-0016
Date: 11/07/2004

Discussion:

On November 7, 2004, at 4:35 p.m, with the plant at approximately 7% power, preparing for startup from a refueling outage, Shearon Harris manually started the A motor driven auxiliary feedwater (MDAFW) pump in response to unplanned lowering of steam generator (S/G) level in the C S/G. The licensee made event notification #41179 for this valid actuation of a safety system.

The licensee's initial investigation focused on the C main feedwater (MFW) regulating bypass valve and identified a leaking air connection. The bypass valve is designed to fail closed on loss of air. Following repair, power was again increased. The C S/G level failed to control and the power ascension was aborted. Additional trouble shooting was unsuccessful and the reactor was brought to hot shutdown on November 8.

Subsequent investigation determined that the lowering of S/G level resulted from the C MFW isolation valve, a double wedge gate valve, being closed instead of open. Although the valve's position indicated closed in the control room, the valve actually failed to open indicating a possible valve stem separation. The AFW flow path, however, is separate from MFW and was not impacted by the failed valve.

On November 10, the licensee verified that the MFW isolation valve stem had separated from the disc, and brought the plant to cold shutdown. Disassembly and examination of the valve identified internal damage to the valve disc and seat. The licensee plans to investigate the cause of the valve failure, assess past operability, and inspect the two remaining feedwater isolation valves.

Contacts:

Name Office Abbrev Phone No E-Mail
FREDRICKSON, PAUL E R2 (404) 562-4530 PEF@nrc.gov


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REGION III

Prairie Island Management Change

Licensee/Facility:

NUCLEAR MANAGEMENT CO.
Prairie Island 2
WELCH, Minnesota
Dockets: 05000306
[2] W-2-LP
License No:
Notification:

MR Number: 3-2004-0039
Date: 11/10/2004

Licensee Infrmd. Res. Insp

Discussion:

Richard Graham, Prairie Island Director of Site Operations, announced today that Mr. Leonard Clewett has accepted the position of Prairie Island Plant Manager. Mr. Clewett most recently held the position of Operations Director at the Three Mile Island Plant. Mr. Clewett will begin his transition the week of November22, 2004, and will assume the Plant Manager's position in January of 2005.

Regional Action: The Resident Inspectors were informed of the change.

Accession Numbers:

Accession No Accession Date
ML043150408 11/10/2004

Contacts:

Name Office Abbrev Phone No E-Mail
SKOKOWSKI, RICHARD A R3 (630) 829-9620 RAS@nrc.gov
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