ML043430449
| ML043430449 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/22/2004 |
| From: | O'Connor T Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMP1L 1890 | |
| Download: ML043430449 (2) | |
Text
Constellation Energy Nine Mile Point Nuclear Station P.O. Box 63 Lycoming, New York 13093 November 22, 2004 NMPIL 1890 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 Removed from Service for Planned 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 the inoperability of Channel #12 of the Containment Hydrogen Monitoring (CHM) system.
Descrintion of Event On November 10, 2004 at approximately 0146 hours0.00169 days <br />0.0406 hours <br />2.414021e-4 weeks <br />5.5553e-5 months <br />, Channel #12 of the CHM system was declared inoperable to perform planned maintenance, including replacement of the motors for the sample pump and bypass pump and replacement of two relays in the analysis cabinet.
The redundant Channel #11 of the CHM system 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 planned maintenance activities.
C tI r' -A
s Page 2 NMP1L 1890 Corrective Actions The planned maintenance was completed and Channel #12 of the CHM system was restored to an operable status on November 12, 2004, at approximately 1244 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.73342e-4 months <br />.
Very yy
,/
thy J. O'Connor General Manager TJO/DEV/jm cc:
Mr. S. J. Collins, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector