ML023330400
| ML023330400 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/31/2002 |
| From: | Hopkins L Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMP1L 1695 | |
| Download: ML023330400 (2) | |
Text
P.O. Box 63 Lycoming, New York 13093 Constellation Energy Group Nine Mile Point Nuclear Station October 31, 2002 NMP1L 1695 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 High Range Radiation Monitor Declared Inoperable to Repair Failed Chart Recorder Gentlemen:
In accordance with Action Statement 3.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 #11 Containment High Range Radiation Monitor.
Description of Event On October 17, 2002, at approximately 0820 hours0.00949 days <br />0.228 hours <br />0.00136 weeks <br />3.1201e-4 months <br />, operators declared the Channel #11 Containment High Range Radiation Monitor inoperable in order to troubleshoot and repair the Channel #11 Containment High Range Radiation Monitor chart recorder.
The redundant Channel #12 Containment High Range Radiation Monitor was operable while the Channel #11 Containment High Range Radiation Monitor was out of service.
Cause of Event The cause of the Channel #11 Containment High Range Radiation Monitor chart recorder failure was a failed servo motor amplifier board.
Page 2 NMP1L 1695 Corrective Actions
- 1.
The Channel #11 Containment High Range Radiation Monitor chart recorder servo motor amplifier board was replaced and the chart recorder calibrated.
- 2.
On October 17, 2002, at approximately 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br />, the Channel #11 Containment High Range Radiation Monitor was returned to service.
- 3.
The Containment High Range Radiation Monitor chart recorder failure has been entered into the site's corrective action program to assess the need for additional follow up actions.
Very truly yours, L-A AL-Lawrence A. Hopkins Plant General Manager LAH/KLE/jm xc:
Mr. H. J. Miller, Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector