ML040710579

Special Report Regarding Inoperable Channel 12 of the Loose Parts Detection System (Lpds)

ML040710579
Person / Time
Site:	Callaway
Issue date:	03/04/2004
From:	Witt W AmerenUE
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ULNRC04956
Download: ML040710579 (5)

Text

AmerenUE PO Box 620 CallawayPlant Fulton, MO 65251 March 4, 2004 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop PI-137 Washington, DC 20555-0001 ULNRC04956 Ladies and Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.

WAmeren FACILITY OPERATING LICENSE NPF-30 UFE SPECIAL REPORT Inoperable Channel 12 of the Loose Parts Detection Svstem (LPDS)

Attached please find a Special Report for the inoperability of Channel 12 of Loose Parts Detection System (LPDS) in accordance with Action 'a' of Final Safety Analysis Report Section 16.3.3.5.

New commitments are identified in this correspondence. None of the material in this response is considered proprietary by Union Electric.

If you have any questions or require additional information, please contact Mr. Mark Reidmeyer, Supervisor, Regional Regulatory Affairs at 573/676-4306.

Sincerely, Warren A. Witt Manager, Callaway Plant WAW/EWH/slk Enclosure(s) 1) Special Report

2) List of Commitments Reference(s): 1) CARS 200400631

2) CARS 200400641

3) EOSL 11259

4) Commitment No. 50093 re - ID, a subsidiary ofAmeren Corporation

ULNRC04956 March 4, 2004 Page 2 Mr. Bruce S. Mallett Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Jack N. Donohew (2 copies)

Licensing Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 7E1 Washington, DC 20555-2738 Missouri Public Service Commission Governor Office Building 200 Madison Street PO Box 360 Jefferson City, MO 65102-0360 Records Center Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, GA 30339

Enclosure to ULNRC04956 March 4, 2004 Page I of I ENCLOSURE, Special Report The Loose-Part Detection System Limiting Condition for Operation (LCO) (Section 16.3.3.5 of FSAR) requires the loose-part detection system to be operable in Modes 1 and 2. With one or more Loose-Part Detection System channels inoperable for more than 30 days, LCO Action 'a' requires a Special Report to be submitted to the Commission within the next 10 days outlining the cause of the malfunction and the plans for restoring the channel(s) to operable status.

On January 27, 2004, with Unit in Mode 3, Channel 12 of the LPDS was declared inoperable. This is one of the two sensors that mounted on the inlet plenum side of Steam Generator "D".

Cause of the malfunction:

The initial investigation has concluded that the failure is likely associated with the channel components or cable connections located inside the primary containment, as indicated by the channel's excessive noise and a constant hum on its audio output.

Plans for restoring the channel to Operable status:

The capability to detect loose metallic parts in the Reactor Coolant System has been retained with the remaining 11 operable channels. The redundant sensor at the Steam Generator "D" inlet plenum is operable. Therefore continued operation to Refuel 13 is acceptable.

A station Work Request has been written to repair Channel 12 of the LPDS. The repair and testing to return the channel to operable status will be scheduled for the next refueling outage (RFO 13), due to limited accessibility resulting from high radiation dose rates during normal plant operation. Refuel 13 is currently scheduled to begin on April 10, 2004.

Repairs will be completed prior to restart from Refuel 13.

COMMITMENT DESIGNATION PROCESS LIST OF COMMITMENTS The following table identifies those actions committed to by Callaway Plant in this document. Any other statements in this submittal are provided for information purposes and are not considered to be commitments. Please direct questions regarding these commitments to Mr. Mark A. Reidmeyer, Regional Regulatory Affairs Supervisor (573) 676-4306.

COMMITMENT Due Date/El vent Restoration of Channel 12 of the Loose Parts Monitoring Prior to restart from Refuel 13 System to Operable Status Note: Refuel 13 is currently scheduled to start April 10, 2004.