ML062850296
| ML062850296 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/02/2006 |
| From: | Hutton J Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML062850296 (2) | |
Text
James A. Hutton Plant General Manager P.O. Box 63 Lycoming, New York 13093 315.349.2061 315,349.4308 Fax Constellation Energy Nine Mile Point Nuclear Station October 2, 2006 U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 ATTENTION:
SUBJECT:
Document Control Desk Nine Mile Point Nuclear Station Unit No. 1; Docket No. 50-220 Special Report: Channel # 11 of the Containment Hydrogen Monitoring System Inoperable for Planned Maintenance In accordance with Action 4.a of Nine Mile Point Unit I 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.
Description of Event On September 18, 2006, at 0810 hours0.00938 days <br />0.225 hours <br />0.00134 weeks <br />3.08205e-4 months <br />, operators declared Channel #11 of the CHM System inoperable for performance of planned maintenance.
Cause of Inoperabilit, Channel #11 of the CHM System was declared inoperable for performance of planned maintenance.
Planned maintenance consisted of replacement of a range switch which allows for switching between different ranges of oxygen concentration on the chart recorder scale. The switch contacts were found degraded during previous surveillance testing.
Channel #12 of the CHM System was verified to be operable prior to removing Channel #11 from service.
Actions Taken The range selector switch was replaced, post maintenance testing was performed satisfactorily and Channel #11 of the CHM System was restored to operable status on September 18, 2006, at 1614 hours0.0187 days <br />0.448 hours <br />0.00267 weeks <br />6.14127e-4 months <br />.
Document Control Desk October 2, 2006 Page 2 Should you have any questions regarding this submittal, please contact M. H. Miller, Licensing Director, at (315) 349-1510.
Sincerely, JAH/RF/kms cc:
S. J. Collins, NRC Regional Administrator, Region I L. M. Cline, NRC Senior Resident Inspector