ML091390400
| ML091390400 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/11/2009 |
| From: | Belcher S Constellation Energy Nuclear Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML091390400 (2) | |
Text
I Sam L. Belcher Plant General Manager P.O. Box 63 Lycoming, New York 13093 315.349.5205 315.349.1321 Fax Constellation Energy-Nine Mile Point Nuclear Station May 11, 2009 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: Containment High Channel 11 Inoperable Range Radiation Monitor Instrumentation In accordance with Action 4 of Nine Mile Point Unit 1 (NMP1) Technical Specification (TS) Table 3.6.11-2, "Accident Monitoring Instrumentation Action Statements," Nine Mile Point Nuclear Station, LLC (NMPNS) is submitting the following Special Report concerning inoperability of Containment High Range Radiation Monitor Instrumentation Channel 11.
Description of Event On April 27, 2009, at 1100, Containment High Range Radiation Monitor Instrumentation, Channel 11, (TS Table 3.6.11-1, Item 7) was declared inoperable as a result of the alarm function being found out of tolerance during Surveillance Testing, required by Technical Specification 4.6.11.
The redundant channel of Containment High Range Radiation Monitor Instrumentation, Channel 12, was operable during the period Channel 11 was inoperable.
Cause of Inoperabilit The cause for the Containment High Range Radiation Monitor Instrumentation Channel 11 alarm function being out of tolerance was instrument set point drift.
Action Taken The alarm function for Containment High Range Radiation Monitor Instrument Channel 11 was adjusted to within specification and declared operable on April 28, 2009, at 1545.
Document Control Desk May 11, 2009 Page 2 Should you have any questions regarding the information in this submittal, please contact T. F. Syrell, Licensing Director, at (315) 349-5219.
Very truly yours, SLB/GNS cc:
S. J. Collins, NRC R. V. Guzman, NRC Resident Inspector, NRC