ENS Event | |
|---|---|
15:00 Oct 5, 2003 | |
| Title | Oscillation Power Range Monitors (Oprm) Declared Inoperable |
| Event Description | See event # 40223, Part 21 reported on 10/04/03 by GE Nuclear Energy for background information.
On October 5, 2003, Progress Energy Carolinas, Inc. received notification from General Electric of a Part 21 involving the potential for numerous, unexpected confirmation count (CC) resets in the event of an instability condition. These CC resets may result in the inoperability of TS Table 3.3.1.1-1,'Reactor Protection System Instrumentation, Function 2. f, OPRM Upscale.' All Unit 1 and Unit 2 OPRM channels have been declared inoperable. Technical Specification 3.3.1.1, Action I requires an alternate method of detecting and suppressing thermal hydraulic instabilities to be implemented within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The alternate methods of detection and suppression are currently in place. Due to the implementation of Technical Specification required compensatory actions, there is minimal safety significance. The NRC Resident Inspector was notified of this event by the licensee. Also see similar events reported by NMP Unit 2 (event # 40217) and Fermi Unit 2 (event # 40215) |
| Where | |
|---|---|
Brunswick  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor | |
| LER: | 05000325/LER-2003-002 |
| Time - Person (Reporting Time:+-2.1 h-0.0875 days <br />-0.0125 weeks <br />-0.00288 months <br />) | |
| Opened: | Willian D. Woodbury 12:54 Oct 5, 2003 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Oct 5, 2003 |
| 40226 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (94 %) |
| After | Power Operation (94 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (97 %) |
| After | Power Operation (97 %) |
WEEKMONTHYEARENS 402262003-10-05T15:00:0005 October 2003 15:00:00
[Table view]10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor Oscillation Power Range Monitors (Oprm) Declared Inoperable 2003-10-05T15:00:00 | |