Search Options
Index | Site Map | FAQ | Facility Info | Reading Rm | New | Help | Glossary | Contact Us

Brunswick 1

2Q/2008 Performance Indicators

Licensee's General Comments: A revision to previously submitted data is included in this Change File. An e-mail from INPO dated 05/02/2008 to industry EPIX coordinators identified a potential problem where Licensees may not have accurately setup device records for Emergency Diesel Generator (EDG) output breakers (non-monitored components in MSPI). Upon review of past output breaker failures at Brunswick, it was determined that one failure met the criteria for a MSPI failure against the EDGs. Failure no. 1191 on 08/14/2004 has been re-classified in CDE as a MSPI failure, and affected the MSPI of EAC Power systems for both Unit nos. 1 and 2 for the period August 2004 through July 2007 (36 month duration). Both Unit nos. 1 and 2 were "White" from the beginning of MSPI, implemented in April 2006, through September 2007. Thus, the addition of the failure would not have made BNP go White any sooner, and the failure dropped-off in August 2007, while BNP stayed White through September 2007. A review of the MSPI data identified the worst case month for this period as December 2006, and after applying the failure, the margin to the Yellow threshold decreased from about 54% margin to 41% margin remaining to the Yellow threshold. Thus, the addition of the MSPI failure on 08/14/2004 had no affect on the color of the indicator on either Unit 1 or Unit 2 during the respective timeframe. (Reference NCR 282146).

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments:

2Q/08: LER 1-2008-01 was submitted in June due to a HPCI main pump seal failure, resulting in an event or condition that could have prevented fulfillment of a safety function. An engineering evaluation is ongoing, and based on preliminary results, the HPCI system has been determined to meet its intended safety function. Upon finalization of the evaluation, this LER is expected to be withdrawn.

Licensee Comments:

2Q/08: A Change File will be submitted for the re-classification of a failure on 08/14/2004 that affected the Emergency AC Power system MSPI for the period August 2004 through July 2007. The change did not affect the color of the indicator. See Change File for details.

2Q/07: Risk Cap Invoked. Added four trains/segments that include emergency bus cross-tie breakers that were previously inadvertently omitted. Unreliability data for the new segments is complete and entered, Unavailability data is not entered pending required changes to INPOs CDE software. PI color was unaffected and remains WHITE. WHITE threshold exceeded since inception of MSPI in 2Q2006 due to multiple failures and corresponding unavailability. Due to unique plant configuration, failures and unavailable hours of each diesel contribute to both Units 1 & 2.

1Q/07: Risk Cap Invoked. New PRA values were entered beginning 1st Quarter 2007 based on Revision 6 to the BNP Basis Document. EDG2 had a fail to start on 02/19/2007 due to a failed LPSCR relay. Also, an evaluation is pending for a potential MSPI failure to the Emergency AC Power system due to an E-bus cross-tie breaker found misaligned. This evaluation shall be complete prior to the end of the 2nd Quarter 2007. The MSPI for Unit 1 Emergency AC Power system remains WHITE since the 2nd Quarter of 2006.

4Q/06: Risk Cap Invoked. Emergency AC power MSPI for Unit 1 remains WHITE from the previous quarter. White threshold exceeded due to increased unreliability factor of Emergency Diesel Generators (EDGs). There are currently seven MSPI failures between the four EDGs during the previous 36 months. Due to unique system configuration, failure on any one of four EDGs affects both Units.

3Q/06: Risk Cap Invoked. MS06: White threshold exceeded due to increased unreliability factor of Emergency Diesel Generators (EDGs). Six total MSPI failures between four DGs in the previous 36 months. Due to unique system configuration, failure on any one of four EDGs is counted against both Units. Revision to previously submitted data: Changed two MSPI failures from Start Demands to Load Run Demands, #1164 on 06/06/2004 and #1215 on 11/10/2004. Revised the Estimated Start and Load Run Demands in baseline. Indicator color unaffected. Change File created.

2Q/06: Risk Cap Invoked.

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments:

6/08: Per the guidelines, RCSA not provided in April because steady state conditions did not exist due to the refuel outage and subsequent startup.

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

Licensee Comments: none

    Action Matrix Summary |  Inspection Findings Summary |  PI Summary |  Reactor Oversight Process