ML022900456
| ML022900456 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/01/2002 |
| From: | Conway J Constellation Generation Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMPIL 1690 | |
| Download: ML022900456 (2) | |
Text
P.O. Box 63 Lycoming, New York 13093 Constellation Generation Group Nine Mile Point Nuclear Station October 1, 2002 NMP1L 1690 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Nine Mile Point Unit 1 Docket No. 50-220; DPR-63 Special Report, Channel #1 1 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 is submitting the following Special Report concerning the inoperability of the Channel #11 Containment Hydrogen Monitoring System.
Description of Event On September 17, 2002, at approximately 1011 hours0.0117 days <br />0.281 hours <br />0.00167 weeks <br />3.846855e-4 months <br />, operators declared the Channel #1I Containment Hydrogen Monitoring System inoperable for scheduled preventive maintenance.
The scheduled preventive maintenance was to calibrate and clean or replace, as necessary, support instrumentation. The preventive maintenance was completed and the Channel #11 Containment Hydrogen Monitoring System was returned to service at approximately 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> on September 21, 2002.
The redundant Channel #12 Containment Hydrogen Monitoring System was verified 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
Page 2 NMP1L 1690 Corrective Actions The scheduled preventive maintenance was completed and the Channel #11 Containment Hydrogen Monitoring System was returned to an operable status on September 21, 2002 at approximately 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br />.
Very truly yours, ghfT. onway a
Site Vice President JTC/KLE/jm cc:
Mr. H. J. Miller, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector