ML040640923
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| ML040640923 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 02/20/2004 |
| From: | Hopkins L Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMP1L 1813 | |
| Download: ML040640923 (2) | |
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|---|---|
Category:Letter
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Text
P.O. Box 63 Lycoming, New York 13093 Constellation Energy Group Nine Mile Point Nuclear Station February 20, 2004 NMP1L 1813 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 #12 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 #112Containment Hydrogen Monitoring System.
Descriptionof Event On February 9, 2004, at approximately 0809 hours0.00936 days <br />0.225 hours <br />0.00134 weeks <br />3.078245e-4 months <br />, operators declared the Channel #12 Containment Hydrogen Monitoring System inoperable for scheduled preventive maintenance work, including rebuild/replacement of the sample pump and the bypass pump and replacement of various solenoid operated valves.
The redundant Channel #11 Containment Hydrogen Monitoring System was verified to be operable prior to removing Channel #12 from service.
Cause of Event The Channel #12 Containment Hydrogen Monitoring System was declared inoperable in order to perform scheduled preventive maintenance.
Page 2 NMiP1L 1813 CorrectiveActions The scheduled preventive maintenance was completed and the Channel #12 Containment Hydrogen Monitoring System was returned to an operable status on February 16, 2004 at approximately 1746 hours0.0202 days <br />0.485 hours <br />0.00289 weeks <br />6.64353e-4 months <br />.
Very truly yours, Lawrence A. Hopkins Plant General Manager LAHfDEV/bjh cc: Mr. H. J. Miller, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector
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