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See event # 40223, Part 21 reported on 10/ … See event # 40223, Part 21 reported on 10/04/03 by GE Nuclear Energy for background information.</br>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.'</br>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 hours. The alternate methods of detection and suppression are currently in place.</br>Due to the implementation of Technical Specification required compensatory actions, there is minimal safety significance.</br>The NRC Resident Inspector was notified of this event by the licensee.</br>Also see similar events reported by NMP Unit 2 (event # 40217) and Fermi Unit 2 (event # 40215) # 40217) and Fermi Unit 2 (event # 40215) +
15:00:00, 5 October 2003 +
40,226 +
12:54:00, 5 October 2003 +
15:00:00, 5 October 2003 +
See event # 40223, Part 21 reported on 10/ … See event # 40223, Part 21 reported on 10/04/03 by GE Nuclear Energy for background information.</br>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.'</br>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 hours. The alternate methods of detection and suppression are currently in place.</br>Due to the implementation of Technical Specification required compensatory actions, there is minimal safety significance.</br>The NRC Resident Inspector was notified of this event by the licensee.</br>Also see similar events reported by NMP Unit 2 (event # 40217) and Fermi Unit 2 (event # 40215) # 40217) and Fermi Unit 2 (event # 40215) +
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