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

Three Mile Island 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 2.0 0 0 0 0 0 0 0
Critical hours 2128.8 2159.0 2184.0 2208.0 1503.8 2183.0 2184.0 2208.0
                 
Indicator value 1.6 1.6 1.6 1.6 0 0 0 0


Licensee Comments: none



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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 0 0 0 1.0 0 0 0
Critical hours 2128.8 2159.0 2184.0 2208.0 1503.8 2183.0 2184.0 2208.0
                 
Indicator value 0.8 0 0 0 0.9 0.9 0.9 0.9

Licensee Comments: none





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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





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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) -4.90E-08 -9.50E-08 -1.40E-07 -1.70E-07 -1.60E-07 -1.20E-07 7.10E-08 7.40E-08
URI (ΔCDF) -8.80E-07 -8.80E-07 -8.70E-07 -8.70E-07 -8.80E-07 -9.00E-07 -9.10E-07 -9.10E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -9.29E-07 -9.75E-07 -1.01E-06 -1.04E-06 -1.04E-06 -1.02E-06 -8.39E-07 -8.36E-07

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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) 5.90E-07 -7.60E-08 -1.40E-07 -1.50E-07 -1.30E-07 2.10E-07 2.10E-07 2.10E-08
URI (ΔCDF) -2.20E-07 -2.20E-07 -2.20E-07 -2.20E-07 -2.20E-07 -2.20E-07 -2.20E-07 -2.20E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 3.70E-07 -2.96E-07 -3.60E-07 -3.70E-07 -3.50E-07 -1.00E-08 -1.00E-08 -1.99E-07

Licensee Comments: none





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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) -9.90E-09 -9.90E-09 2.40E-08 2.50E-08 2.20E-08 1.10E-08 6.70E-09 1.40E-09
URI (ΔCDF) -1.20E-08 -1.20E-08 -1.20E-08 -1.20E-08 -1.20E-08 -1.20E-08 -1.20E-08 -1.20E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -2.19E-08 -2.19E-08 1.20E-08 1.30E-08 1.00E-08 -1.00E-09 -5.30E-09 -1.06E-08

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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) -5.00E-08 2.30E-08 -1.90E-08 -2.00E-08 -8.20E-09 -1.10E-08 -1.30E-08 -1.20E-08
URI (ΔCDF) -9.70E-07 -9.70E-07 -9.70E-07 -9.70E-07 -9.70E-07 -9.70E-07 -9.70E-07 -9.70E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -1.02E-06 -9.47E-07 -9.89E-07 -9.90E-07 -9.78E-07 -9.81E-07 -9.83E-07 -9.82E-07

Licensee Comments: none





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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) 4.00E-07 2.20E-07 2.30E-07 2.20E-07 2.30E-07 4.70E-07 5.20E-07 5.60E-07
URI (ΔCDF) -3.70E-06 -3.70E-06 -3.70E-06 -3.70E-06 -3.70E-06 -1.70E-06 -1.70E-06 -1.60E-06
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -3.30E-06 -3.48E-06 -3.47E-06 -3.48E-06 -3.47E-06 -1.23E-06 -1.18E-06 -1.04E-06

Licensee Comments: none





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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 0.003590 0.003550 0.004240 0.004070 0.004260 0.004540 0.004440 0.004350 0.004910 0.004440 0.004150 0.004400
Technical specification limit 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
                         
Indicator value 1.0 1.0 1.2 1.2 1.2 1.3 1.3 1.2 1.4 1.3 1.2 1.3
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 0.004710 0.001680 0.002100 0.001940 0.002230 0.002140 0.002220 0.002380 0.002470 0.002770 0.002700 0.002860
Technical specification limit 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
                         
Indicator value 1.3 0.5 0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.8 0.8 0.8

Licensee Comments: none





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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 0.096 0.083 0.167 0.087 0.123 0.106 0.076 0.075 0.096 0.076 0.079 0.074
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 1.0 0.8 1.7 0.9 1.2 1.1 0.8 0.8 1.0 0.8 0.8 0.7
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 0.060 0.335 0.106 0.108 0.108 0.171 0.092 0.103 0.077 0.131 0.093 0.084
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 0.6 3.4 1.1 1.1 1.1 1.7 0.9 1.0 0.8 1.3 0.9 0.8

Licensee Comments: none





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Drill/Exercise Performance 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Successful opportunities 211.0 65.0 15.0 38.0 3.0 62.0 29.0 24.0
Total opportunities 214.0 66.0 16.0 40.0 4.0 63.0 30.0 24.0
                 
Indicator value 96.7% 96.8% 97.2% 97.5% 97.5% 97.7% 97.5% 97.8%

Licensee Comments: none





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ERO Drill Participation 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Participating Key personnel 59.0 61.0 57.0 62.0 61.0 58.0 56.0 60.0
Total Key personnel 59.0 61.0 57.0 62.0 61.0 58.0 56.0 61.0
                 
Indicator value 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 98.4%

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Alert & Notification System 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08 3Q/08
Successful siren-tests 1248 1246 1244 1245 1245 1248 1247 1246
Total sirens-tests 1248 1248 1248 1248 1247 1248 1248 1248
                 
Indicator value 99.4% 99.3% 99.8% 99.8% 99.8% 99.8% 99.9% 99.9%

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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 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 0 0 0

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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