ML050690172

Special Report, Channel No. 11 of the Containment Hydrogen Monitoring System Inoperable for Scheduled Preventive Maintenance

ML050690172
Person / Time
Site:	Nine Mile Point
Issue date:	03/01/2005
From:	O'Connor T Constellation Energy Group
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NMP1L 1932
Download: ML050690172 (2)

Text

Constellation Energy P.O. Box 63 Lycoming, NY 13093 Nine Mile Point Nuclear Station March 1, 2005 NMP1L 1932 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 #11 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 #11 of the Containment Hydrogen Monitoring (CHM) System.

Descriptionof Event On February 15, 2005 at approximately 0510 hours0.0059 days <br />0.142 hours <br />8.43254e-4 weeks <br />1.94055e-4 months <br />, operators declared Channel #11 of the CHM System inoperable to perform scheduled preventive maintenance.

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

Cause of Event Channel #11 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 and analyzer cabinet relays.

NMP1L 1932 Page 2 CorrectiveActions Channel #11 of the CHM System was restored to operable status on February 17, 2005, at approximately 2014 hours0.0233 days <br />0.559 hours <br />0.00333 weeks <br />7.66327e-4 months <br />.

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