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Home > Nuclear Reactors > Operating Reactors > Oversight > Reactor Oversight Process

Seabrook 1

3Q/2008 Performance Indicators

Licensee's General Comments: none



Link to Notes

Unplanned Scrams per 7000 Critical Hrs 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Unplanned scrams 0 0 0 0 0 1.0 0 0
Critical hours 1332.8 2159.0 2184.0 2208.0 2209.0 1914.0 1305.4 2208.0
                 
Indicator value 0 0 0 0 0 0.8 0.9 0.9


Licensee Comments: none



Link to Notes

Unplanned Power Changes per 7000 Critical Hrs 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Unplanned power changes 0 1.0 0 0 0 1.0 1.0 0
Critical hours 1332.8 2159.0 2184.0 2208.0 2209.0 1914.0 1305.4 2208.0
                 
Indicator value 0.9 1.8 1.8 0.9 0.8 0.8 1.8 1.8

Licensee Comments: none





Link to Notes

Unplanned Scrams with Complications 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Scrams with complications 0 0 0 0 0 0 0 0
                 
                 
Indicator value       0.0 0.0 0.0 0.0 0.0

Licensee Comments: none





Link to Notes

Safety System Functional Failures (PWR) 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Safety System Functional Failures 0 0 0 0 0 0 0 0
                 
Indicator value 0 0 0 0 0 0 0 0

Licensee Comments: none





Link to Notes

Mitigating Systems Performance Index, Emergency AC Power System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
UAI (ΔCDF) -3.50E-08 -3.50E-08 -5.00E-08 -5.00E-08 -7.40E-08 -7.40E-08 -7.40E-08 -5.90E-08
URI (ΔCDF) 1.00E-06 1.00E-06 4.70E-07 4.70E-07 6.60E-07 7.20E-07 1.20E-07 5.90E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 9.65E-07 9.65E-07 4.20E-07 4.20E-07 5.86E-07 6.46E-07 4.60E-08 5.31E-07

Licensee Comments:

3Q/08: Risk Cap Invoked.





Link to Notes

Mitigating Systems Performance Index, High Pressure Injection System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
UAI (ΔCDF) -1.80E-08 -1.20E-08 -9.10E-09 -1.20E-08 -6.20E-09 -1.90E-09 -4.20E-09 1.10E-09
URI (ΔCDF) -8.10E-09 -8.10E-09 -8.20E-09 -8.10E-09 -8.90E-09 -9.00E-09 -8.80E-09 -8.70E-09
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -2.61E-08 -2.01E-08 -1.73E-08 -2.01E-08 -1.51E-08 -1.09E-08 -1.30E-08 -7.60E-09

Licensee Comments: none





Link to Notes

Mitigating Systems Performance Index, Heat Removal System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
UAI (ΔCDF) -4.00E-08 -3.90E-08 -5.30E-08 -5.90E-08 -8.40E-08 -8.80E-08 -8.80E-08 -6.40E-08
URI (ΔCDF) -1.30E-07 -1.30E-07 -1.20E-07 -1.20E-07 -1.30E-07 -1.30E-07 -1.30E-07 -1.30E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -1.70E-07 -1.69E-07 -1.73E-07 -1.79E-07 -2.14E-07 -2.18E-07 -2.18E-07 -1.94E-07

Licensee Comments: none





Link to Notes

Mitigating Systems Performance Index, Residual Heat Removal System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
UAI (ΔCDF) -1.40E-08 -1.40E-08 -1.40E-08 -1.40E-08 -1.50E-08 -1.10E-08 -1.10E-08 -1.10E-08
URI (ΔCDF) -4.00E-08 -4.00E-08 -4.00E-08 -4.00E-08 -4.40E-08 -4.60E-08 -4.70E-08 -4.70E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -5.40E-08 -5.40E-08 -5.40E-08 -5.40E-08 -5.90E-08 -5.70E-08 -5.80E-08 -5.80E-08

Licensee Comments: none





Link to Notes

Mitigating Systems Performance Index, Cooling Water Systems 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
UAI (ΔCDF) -3.20E-14 -3.20E-14 -3.20E-14 -3.20E-14 7.10E-09 7.20E-09 7.20E-09 7.20E-09
URI (ΔCDF) -1.30E-07 -1.30E-07 -1.30E-07 -1.30E-07 -1.10E-07 -1.00E-07 -1.00E-07 -2.10E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -1.30E-07 -1.30E-07 -1.30E-07 -1.30E-07 -1.03E-07 -9.28E-08 -9.28E-08 -1.38E-08

Licensee Comments: none





Link to Notes

Reactor Coolant System Activity 10/06 11/06 12/06 1/07 2/07 3/07 4/07 5/07 6/07 7/07 8/07 9/07
Maximum activity N/A 0.000042 0.000059 0.000058 0.000077 0.000070 0.000055 0.000084 0.000079 0.000087 0.000084 0.000088
Technical specification limit 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
                         
Indicator value N/A 0 0 0 0 0 0 0 0 0 0 0
Reactor Coolant System Activity 10/07 11/07 12/07 1/08 2/08 3/08 4/08 5/08 6/08 7/08 8/08 9/08
Maximum activity 0.000079 0.000084 0.000100 0.000120 0.000102 0.000148 N/A 0.000055 0.000057 0.000056 0.000066 0.000061
Technical specification limit 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
                         
Indicator value 0 0 0 0 0 0 N/A 0 0 0 0 0

Licensee Comments: none





Link to Notes

Reactor Coolant System Leakage 10/06 11/06 12/06 1/07 2/07 3/07 4/07 5/07 6/07 7/07 8/07 9/07
Maximum leakage 0.152 0.290 0.060 0.103 0.030 0.045 0.047 0.035 0.034 0.036 0.040 0.035
Technical specification limit 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0
                         
Indicator value 1.5 2.9 0.6 1.0 0.3 0.5 0.5 0.4 0.3 0.4 0.4 0.4
Reactor Coolant System Leakage 10/07 11/07 12/07 1/08 2/08 3/08 4/08 5/08 6/08 7/08 8/08 9/08
Maximum leakage 0.036 0.039 0.039 0.045 0.057 0.053 0 0.039 0.018 0.017 0.015 0.013
Technical specification limit 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0
                         
Indicator value 0.4 0.4 0.4 0.5 0.6 0.5 0 0.4 0.2 0.2 0.2 0.1

Licensee Comments: none





Link to Notes

Drill/Exercise Performance 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Successful opportunities 32.0 18.0 17.0 29.0 33.0 19.0 16.0 16.0
Total opportunities 32.0 18.0 17.0 29.0 33.0 19.0 16.0 16.0
                 
Indicator value 99.2% 99.1% 99.1% 99.1% 99.0% 99.0% 99.5% 100.0%

Licensee Comments: none





Link to Notes

ERO Drill Participation 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Participating Key personnel 81.0 77.0 75.0 89.0 83.0 82.0 81.0 81.0
Total Key personnel 81.0 78.0 76.0 89.0 83.0 82.0 81.0 81.0
                 
Indicator value 100.0% 98.7% 98.7% 100.0% 100.0% 100.0% 100.0% 100.0%

Licensee Comments: none





Link to Notes

Alert & Notification System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Successful siren-tests 725 847 724 845 724 845 725 843
Total sirens-tests 726 847 726 847 726 847 726 847
                 
Indicator value 99.7% 99.7% 99.6% 99.8% 99.8% 99.7% 99.8% 99.7%

Licensee Comments: none





Link to Notes

Occupational Exposure Control Effectiveness 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
High radiation area occurrences 0 0 0 0 0 0 1 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 0 1 1

Licensee Comments: none





Link to Notes

RETS/ODCM Radiological Effluent 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
RETS/ODCM occurrences 0 0 0 0 0 0 0 0
                 
Indicator value 0 0 0 0 0 0 0 0

Licensee Comments: none





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Last Modified: November 26, 2008