Susquehanna 1
2Q/2012 Performance Indicators
Licensee's General Comments: none
| Unplanned Scrams per 7000 Critical Hrs | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Unplanned scrams | 1.0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 |
| Critical hours | 1794.1 | 2209.0 | 1981.8 | 1291.5 | 2208.0 | 2209.0 | 2165.2 | 353.0 |
| Indicator value | 3.0 | 3.0 | 3.7 | 1.9 | 0.9 | 0.9 | 0 | 0 |
Licensee Comments:
1Q/12: Supplemental LER's 50-387/2011-002-01, 50-387/2010-002-02, and 50-387/2010-003-03 were submitted in February 2012 to provide updated information related to the previously reported unplanned scrams at Susquehanna Unit 1 in April, May, July 2010, and January 2011.
1Q/11: Within the last four quarters, Susquehanna Unit 1 has experienced four reactor scrams. These events cause the NRC IE01 Unplanned Scrams per 7000 Critical Hours PI to cross the GREEN/WHITE threshold.
| Unplanned Power Changes per 7000 Critical Hrs | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Unplanned power changes | 0 | 1.0 | 0 | 1.0 | 1.0 | 0 | 0 | 1.0 |
| Critical hours | 1794.1 | 2209.0 | 1981.8 | 1291.5 | 2208.0 | 2209.0 | 2165.2 | 353.0 |
| Indicator value | 1.0 | 1.0 | 0.9 | 1.9 | 2.7 | 1.8 | 1.8 | 2.0 |
Licensee Comments: none
| Unplanned Scrams with Complications | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Scrams with complications | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Indicator value | 1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Licensee Comments:
4Q/10: The 3rd quarter 2010 data is revised from 0 to 1 Unplanned Scram with Complications based on the July 16, 2010 Unit 1 shutdown (LER 2010-003-00) which was previously reported as an Unplanned Scram per 7,000 Critical Hours. During the fourth quarter of 2010 it was determined that this scram should be reclassified as an Unplanned Scram with Complications, in accordance with NEI 99-02, Regulatory Assessment Performance Indicator Guideline. There is no safety significance associated with this change, and the color of both the Unit 1 Unplanned Scram per 7,000 Critical Hours and the Unit 1 Unplanned Scram with Complications performance indicators remains Green.
| Safety System Functional Failures (BWR) | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Safety System Functional Failures | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 |
| Indicator value | 1 | 0 | 1 | 2 | 2 | 2 | 1 | 2 |
Licensee Comments:
2Q/12: LER 387/2012-001-00, Both Control Structure Chillers Inoperable, was submitted on May 23, 2012. LER 387/2012-002-00, "B" Control Structure Chiller Inoperable Concurrent with "A" Emergency Diesel Generator Out of Service, was submitted to the NRC on June 4, 2012.
| Mitigating Systems Performance Index, Emergency AC Power System | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| UAI (ΔCDF) | -2.82E-08 | -2.88E-08 | -1.85E-08 | -2.11E-08 | 3.96E-10 | 1.92E-07 | 1.92E-07 | 2.13E-07 |
| URI (ΔCDF) | -6.24E-06 | -6.23E-06 | -6.19E-06 | -6.72E-06 | -6.75E-06 | -6.25E-06 | -6.24E-06 | -6.18E-06 |
| PLE | NO | NO | NO | NO | NO | NO | NO | NO |
| Indicator value | -6.30E-06 | -6.30E-06 | -6.20E-06 | -6.70E-06 | -6.70E-06 | -6.10E-06 | -6.00E-06 | -6.00E-06 |
Licensee Comments:
2Q/12: Risk Cap Invoked.
1Q/12: Risk Cap Invoked.
4Q/11: Risk Cap Invoked. The 3Q2011 Emergency AC Power System data is revised to include additional unavailable hours for the "C" diesel generator in September 2011. There is no safety significance associated with this change. The PI color was green before the data revision and it remains green after the change.
1Q/11: Risk Cap Invoked.
4Q/10: Risk Cap Invoked. Changed PRA Parameter(s). The Emergency Diesel Generator data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current Emergency Diesel Generator Performance Indicator remains Green.
3Q/10: Risk Cap Invoked. Changed PRA Parameter(s).
3Q/10: Risk Cap Invoked.
| Mitigating Systems Performance Index, High Pressure Injection System | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| UAI (ΔCDF) | 2.23E-09 | 2.00E-09 | 1.00E-08 | 1.04E-08 | 1.11E-08 | 1.40E-08 | 1.42E-08 | 1.50E-08 |
| URI (ΔCDF) | -6.99E-09 | -6.63E-09 | -6.61E-09 | -6.61E-09 | -6.61E-09 | -6.89E-09 | -6.67E-09 | -6.71E-09 |
| PLE | NO | NO | NO | NO | NO | NO | NO | NO |
| Indicator value | -4.80E-09 | -4.60E-09 | 3.40E-09 | 3.80E-09 | 4.50E-09 | 7.10E-09 | 7.50E-09 | 8.30E-09 |
Licensee Comments:
4Q/11: The 3Q2010 data is revised due to a data entry error for ESF Non-Test demands. There is no safety significance associated with this change. The PI color was green before the data revision and it remains green after the change
4Q/10: Changed PRA Parameter(s). The High Pressure Coolant Injection data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current High Pressure Coolant Injection Performance Indicator remains Green.
4Q/10: The High Pressure Coolant Injection data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current High Pressure Coolant Injection Performance Indicator remains Green.
3Q/10: Changed PRA Parameter(s).
| Mitigating Systems Performance Index, Heat Removal System | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| UAI (ΔCDF) | -4.06E-09 | -4.06E-09 | -4.06E-09 | -4.06E-09 | -8.88E-10 | -8.88E-10 | -8.89E-10 | -2.68E-10 |
| URI (ΔCDF) | -8.12E-09 | -7.86E-09 | -8.14E-09 | -8.14E-09 | -8.39E-09 | -8.39E-09 | -8.39E-09 | -8.39E-09 |
| PLE | NO | NO | NO | NO | NO | NO | NO | NO |
| Indicator value | -1.20E-08 | -1.20E-08 | -1.20E-08 | -1.20E-08 | -9.30E-09 | -9.30E-09 | -9.30E-09 | -8.70E-09 |
Licensee Comments:
4Q/10: Changed PRA Parameter(s). The Reactor Core Isolation Cooling data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current Reactor Core Isolation Cooling Performance Indicator remains Green.
3Q/10: Changed PRA Parameter(s).
| Mitigating Systems Performance Index, Residual Heat Removal System | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| UAI (ΔCDF) | -5.46E-10 | -6.35E-10 | -8.89E-10 | -8.44E-10 | 1.85E-09 | 1.85E-09 | 1.85E-09 | 2.25E-09 |
| URI (ΔCDF) | -3.10E-08 | -3.02E-08 | -2.95E-08 | -2.97E-08 | -3.06E-08 | -3.07E-08 | -3.13E-08 | -3.40E-08 |
| PLE | NO | NO | NO | NO | NO | NO | NO | NO |
| Indicator value | -3.20E-08 | -3.10E-08 | -3.00E-08 | -3.10E-08 | -2.90E-08 | -2.90E-08 | -2.90E-08 | -3.20E-08 |
Licensee Comments:
4Q/10: Changed PRA Parameter(s). The Residual Heat Removal data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current Residual Heat Removal Performance Indicator remains Green.
3Q/10: Changed PRA Parameter(s).
| Mitigating Systems Performance Index, Cooling Water Systems | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| UAI (ΔCDF) | 2.77E-08 | 1.66E-08 | 1.60E-08 | 1.10E-08 | 1.85E-08 | 2.25E-08 | 2.64E-08 | 2.68E-08 |
| URI (ΔCDF) | -3.20E-08 | -3.18E-08 | -3.17E-08 | -3.24E-08 | -3.29E-08 | -3.30E-08 | -3.30E-08 | -3.38E-08 |
| PLE | NO | NO | NO | NO | NO | NO | NO | NO |
| Indicator value | -4.30E-09 | -1.50E-08 | -1.60E-08 | -2.10E-08 | -1.40E-08 | -1.00E-08 | -6.60E-09 | -7.10E-09 |
Licensee Comments:
4Q/11: Previously reported data for 3Q2009, 2Q2010, and 3Q2010 is revised for operational non-test strokes of valves HV01224A1 and HV01224B1. This change provides more conservative values for the stroke count. There is no safety significance associated with this change. The PI color was green before the data revision and it remains green after the change.
4Q/10: Changed PRA Parameter(s). The Residual Heat Removal Service Water / Emergency Service Water data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current Residual Heat Removal Service Water / Emergency Service Water Performance Indicator remains Green.
4Q/10: The Residual Heat Removal Service Water / Emergency Service Water data previously reported for the first, second, and third quarters of 2010 is revised based on changed PRA parameters and the resulting revision to the MSPI coefficients in the SSES MSPI Basis Document. There is no safety significance associated with this change, and the color of the current Residual Heat Removal Service Water / Emergency Service Water Performance Indicator remains Green.
3Q/10: Changed PRA Parameter(s).
| Reactor Coolant System Activity | 7/10 | 8/10 | 9/10 | 10/10 | 11/10 | 12/10 | 1/11 | 2/11 | 3/11 | 4/11 | 5/11 | 6/11 |
| Maximum activity | 0.000005 | 0.000005 | 0.000005 | 0.000005 | 0.000006 | 0.000010 | 0.000007 | 0.000007 | 0.000008 | 0.000007 | 0.000008 | N/A |
| Technical specification limit | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Indicator value | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | N/A |
| Reactor Coolant System Activity | 7/11 | 8/11 | 9/11 | 10/11 | 11/11 | 12/11 | 1/12 | 2/12 | 3/12 | 4/12 | 5/12 | 6/12 |
| Maximum activity | 0.000006 | 0.000007 | 0.000007 | 0.000007 | 0.000007 | 0.000007 | 0.000008 | 0.000008 | 0.000007 | N/A | N/A | N/A |
| Technical specification limit | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Indicator value | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | N/A | N/A | N/A |
Licensee Comments: none
| Reactor Coolant System Leakage | 7/10 | 8/10 | 9/10 | 10/10 | 11/10 | 12/10 | 1/11 | 2/11 | 3/11 | 4/11 | 5/11 | 6/11 |
| Maximum leakage | 1.770 | 1.730 | 1.720 | 1.740 | 1.740 | 1.740 | 1.790 | 2.300 | 2.090 | 1.740 | 1.760 | 1.780 |
| Technical specification limit | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 |
| Indicator value | 7.1 | 6.9 | 6.9 | 7.0 | 7.0 | 7.0 | 7.2 | 9.2 | 8.4 | 7.0 | 7.0 | 7.1 |
| Reactor Coolant System Leakage | 7/11 | 8/11 | 9/11 | 10/11 | 11/11 | 12/11 | 1/12 | 2/12 | 3/12 | 4/12 | 5/12 | 6/12 |
| Maximum leakage | 1.740 | 1.750 | 1.760 | 1.760 | 1.770 | 1.770 | 1.770 | 1.790 | 1.780 | N/A | N/A | 2.680 |
| Technical specification limit | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 |
| Indicator value | 7.0 | 7.0 | 7.0 | 7.0 | 7.1 | 7.1 | 7.1 | 7.2 | 7.1 | N/A | N/A | 10.7 |
Licensee Comments:
12/11: Previously reported data for Reactor Coolant System Leakage for the period from 1Q2010 through 2Q2011 is revised to provide the correct value for maximum monthly identified leakage. There is no safety significance associated with this change. The PI color was green before the data revision and it remains green after the change.
| Drill/Exercise Performance | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Successful opportunities | 35.0 | 18.0 | 0 | 21.0 | 21.0 | 10.0 | 23.0 | 12.0 |
| Total opportunities | 36.0 | 21.0 | 0 | 21.0 | 22.0 | 10.0 | 25.0 | 12.0 |
| Indicator value | 94.2% | 94.1% | 95.6% | 96.0% | 95.9% | 96.2% | 95.6% | 95.2% |
Licensee Comments: none
| ERO Drill Participation | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Participating Key personnel | 68.0 | 68.0 | 70.0 | 74.0 | 72.0 | 71.0 | 75.0 | 75.0 |
| Total Key personnel | 68.0 | 68.0 | 70.0 | 74.0 | 72.0 | 71.0 | 75.0 | 75.0 |
| Indicator value | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
Licensee Comments: none
| Alert & Notification System | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| Successful siren-tests | 605 | 606 | 531 | 606 | 607 | 608 | 608 | 532 |
| Total sirens-tests | 608 | 608 | 532 | 608 | 608 | 608 | 608 | 532 |
| Indicator value | 99.6% | 99.8% | 99.7% | 99.7% | 99.7% | 99.8% | 99.9% | 100.0% |
Licensee Comments: none
| Occupational Exposure Control Effectiveness | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| High radiation area occurrences | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Very high radiation area occurrences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Unintended exposure occurrences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Indicator value | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
Licensee Comments: none
| RETS/ODCM Radiological Effluent | 3Q/10 | 4Q/10 | 1Q/11 | 2Q/11 | 3Q/11 | 4Q/11 | 1Q/12 | 2Q/12 |
| RETS/ODCM occurrences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Indicator value | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Licensee Comments: none
Although the Security Cornerstone is included in the Reactor Oversight Process assessment program, the Commission has decided that specific information related to findings and performance indicators pertaining to the Security Cornerstone will not be publicly available to ensure that security information is not provided to a possible adversary. Other than the fact that a finding or performance indicator is Green or Greater-Than-Green, security related information will not be displayed on the public web page.
Action Matrix Summary |
Inspection Findings Summary |
PI Summary |
Reactor Oversight Process
Last Modified: July 24, 2012