ML033640493

Special Report Regarding Channel #11 Containment Hydrogen Monitoring System Being Inoperable for Scheduled Preventive Maintenance

ML033640493
Person / Time
Site:	Nine Mile Point
Issue date:	12/19/2003
From:	Leonard M Constellation Energy Group
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NMP1L 1803
Download: ML033640493 (2)

Text

P.O. Box 63 Lycoming, New York 13093 Constellaton Energy Group Nine Mile Point Nuclear Station December 19, 2003 NMP1L 1803 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

Nine Mile Point Unit 1 Docket No. 50-220 License No. DPR-63 Special Report, Channel #11 Containment Hydrogen Monitoring System Inoperable for Scheduled Preventive Maintenance Gentlemen:

In accordance with Action Statement 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 (NMPNS) is submitting the following Special Report concerning the inoperability of the Channel #11 Containment Hydrogen Monitoring System.

Descriptionof Event On December 8, 2003, at approximately 0404 hours0.00468 days <br />0.112 hours <br />6.679894e-4 weeks <br />1.53722e-4 months <br />, operators declared the Channel #11 Containment Hydrogen Monitoring System inoperable for scheduled preventive maintenance involving valves in the sample stream. The work includes replacing isolation valve actuator rubber goods, replacing certain solenoid operated valves, and calibrating pressure control valves associated with the isolation valves.

The redundant Channel #12 Containment Hydrogen Monitoring System was verified to be in service prior to removing Channel #11 from service.

Cause of Event The Channel #11 Containment Hydrogen Monitoring System was declared inoperable in order to perform scheduled preventive maintenance.

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Page 2 NMP1L 1803 CorrectiveActions The scheduled preventive maintenance was completed and the Channel #11 Containment Hydrogen Monitoring System was returned to an operable status on December 19, 2003 at approximately 1159 hours0.0134 days <br />0.322 hours <br />0.00192 weeks <br />4.409995e-4 months <br />.

Very truly yours, M. Steven Leonard General Supervisor Licensing (Acting)

MSL/DEV/bjh cc: Mr. H. J. Miller, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector