ML050250145

Special Report, Channel #12 of the Containment Hydrogen Monitoring System Inoperable for Scheduled Preventive Maintenance

ML050250145
Person / Time
Site:	Nine Mile Point
Issue date:	01/17/2005
From:	O'Connor T Constellation Energy Group
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NMP1L 1917
Download: ML050250145 (2)

Text

. Constellation Energy- P.O. Box 63 Nine Mile Point Nuclear Station Lycoming, New York 13093 January 17, 2005 NMP1L 1917 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

SUBJECT:

Nine Mile Point Unit 1 Docket No. 50-220 License No. DPR-63 Special Report, Channel #12 of the Containment Hydrogen Monitoring System Inoperable for Scheduled Preventive Maintenance Gentlemen:

In accordance with Action 4.a of Nine Mile Point Unit 1 Technical Specification Table 3.6.11-2, "Accident Monitoring Instrumentation Action Statements," Nine Mile Point Nuclear Station, LLC, is submitting the following Special Report concerning inoperability of Channel #12 of the Containment Hydrogen Monitoring (CHM) System.

Description of Event On January 3, 2005, at approximately 1038 hours0.012 days <br />0.288 hours <br />0.00172 weeks <br />3.94959e-4 months <br />, operators declared Channel #12 of the CHM System inoperable to perform scheduled preventive maintenance.

The redundant Channel #11 was verified to be operable prior to removal of Channel #12 from service.

Cause of Event Channel #12 of the CHM System was removed from service to support scheduled preventive maintenance which included replacement of the bypass and analyzer cabinet solenoid operated valves.

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NMP1L 1917 Page 2 CorrectiveActions Channel #12 of the CHMI System was restored to operable status on January 6, 2005, at approximately 1459 hours0.0169 days <br />0.405 hours <br />0.00241 weeks <br />5.551495e-4 months <br />.

TJO/RF/jm cc: Mr. S. J. Collins, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector