ULNRC-05721, Special Report, Inoperable Channel 8 of the Loose Parts Monitoring System (Lpms)

Special Report, Inoperable Channel 8 of the Loose Parts Monitoring System (Lpms)

ML102030357
Person / Time
Site:	Callaway
Issue date:	07/22/2010
From:	Maglio S AmerenUE, Union Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ULNRC-05721
Download: ML102030357 (5)

Text

AmerenUE PO Box 620 Cal/away Plant Fulton, MO 65251 July 22, 2010 ULNRC-05721 u.s. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

~~ Ladies and Gentlemen:

wAmeren DOCKET NUMBER 50-483 UE CALLAWAY PLANT UNION ELECTRIC CO.

FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT INOPERABLE CHANNEL 8 OF THE LOOSE PARTS MONITORING SYSTEM (LPMS)

Attached is a Special Report for the inoperability of Channel 8 of the Loose Parts Monitoring System (LPMS) at Callaway. This report is submitted in accordance with Final Safety Analysis Report (FSAR) Section 16.3.3.5, Action 'a'.

A new commitment (for restoring the inoperable LPMS channel) is identified in this correspondence. None of the material presented herein is considered to be proprietary by Union Electric.

If you have any questions or require additional information, please contact Mr. Tom Elwood at 314-225-1905.

Sincerely, XJ~r\~

Scott Maglio Regulatory Affairs Manager Enclosure - Special Report a subsidiary of Ameren Corporation

ULNRC-05721 July 22, 2010 Page 2 cc: Mr. Elmo E. Collins, Jr.

Regional Administrator U. S. Nuclear Regulatory Commission Region IV 612 E . Lamar Blvd., Suite 400 Arlington, TX 76011-4125 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Mohan C. Thadani (2 copies)

Senior Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 0-8G 14 Washington, DC 20555-2738

ULNRC-05721 July 22, 2010 Page 3 Index and send hardcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 4200 South Hulen, Suite 630 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed. )

Electronic distribution for the following can be made via Responses and Reports ULNRC Distribution:

A. C. Heflin F. M. Diya L. S. Sandbothe C. O. Reasoner III S. M. Maglio T. B. Elwood S. L. Gallagher T. L. Woodward (NSRB)

Mr. Ron Reynolds, Director (SEMA)

Mr. Edward Gray, Senior REP Planner (SEMA)

Mr. John Campbell, REP Planner (SEMA)

Ms. Diane M. Hooper (WCNOC)

Mr. Tim Hope (Luminant Power)

Mr. Ron Barnes (APS)

Mr. Tom Baldwin (pG&E)

Mr. Wayne Harrison (STPNOC)

Ms. Linda Conklin (SCE)

Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)

Mr. Dm Buntin (DNR)

ULNRC-05721 July 22, 2010 Page 4 LIST OF COMMITMENTS The following table identifies those actions committed to by AmerenUE in this document. Any other statements in this document are provided for information purposes and are not considered commitments. Please direct questions regarding these commitments to Mr. Tom Elwood at 314-225-1905.

COMMITMENT Due DatelEvent COMN Restore Loose Parts Monitoring System Prior to Mode 2 50132 Channel 8 to Operable Status. entry during restart from Refuel 18

Enclosure to ULNRC-05721 ENCLOSURE Special Report The Loose Parts Monitoring System (LPMS) has a Limiting Condition for Operation (LCO) in Final Safety Analysis Report (FSAR) Section 16.3.3.5 which requires the LPMS to be Operable in Modes 1 and 2. With one or more LPMS channels inoperable for more than 30 days, Action 'a' ofFSAR Section 16.3.3.5 requires a Special Report to be submitted to the NRC within the next 10 days that outlines the cause of the malfunction and provides the plans for restoring the inoperable channel( s) to Operable status.

On June 30, 2010, with Callaway Plant in Mode 1, Channel 8 of the LPMS was declared inoperable. This is one of two sensors located at the hot leg inlet to Steam Generator 'B. '

Cause of the Malfunction The initial investigation has concluded that the channel degradation is likely associated with the channel accelerometer and hard-line cable located inside the bio-shield of the containment building. There is no audio or signal meter indication.

Plans for Restoring the Channel to Operable Status The capability to detect loose metallic parts in the Reactor Coolant System will be retained with the remaining 11 operable channels. The redundant sensor on the hot leg inlet to Steam Generator 'B' is Operable. Therefore, continued plant operation until Refuel 18 is acceptable.

Job 10005672 has been written to repair channel 8 of the LPMS. The accelerometer will be replaced and baseline data taken. This repair and post-maintenance testing will be scheduled for the next refueling outage (Refuel 18) due to limited accessibility and high radiation dose rates required for this job if it were to be performed during normal plant operation.

Refuel 18 is currently scheduled to begin in October 2011. Repairs will be completed prior to Mode 2 entry during restart from Refuel 18.