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

Three Mile Island 1

2Q/2008 Performance Indicators

Licensee's General Comments: none



Link to Notes

Unplanned Scrams per 7000 Critical Hrs 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
Unplanned scrams 0 2.0 0 0 0 0 0 0
Critical hours 2208.0 2128.8 2159.0 2184.0 2208.0 1503.8 2183.0 2184.0
                 
Indicator value 0 1.6 1.6 1.6 1.6 0 0 0


Licensee Comments: none



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Unplanned Power Changes per 7000 Critical Hrs 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
Unplanned power changes 0 0 0 0 0 1.0 0 0
Critical hours 2208.0 2128.8 2159.0 2184.0 2208.0 1503.8 2183.0 2184.0
                 
Indicator value 0.9 0.8 0 0 0 0.9 0.9 0.9

Licensee Comments: none





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

Licensee Comments: none





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Safety System Functional Failures (PWR) 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/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 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
UAI (ΔCDF) 1.20E-08 -4.90E-08 -9.50E-08 -1.40E-07 -1.70E-07 -1.60E-07 -1.20E-07 7.10E-08
URI (ΔCDF) -8.90E-07 -8.80E-07 -8.80E-07 -8.70E-07 -8.70E-07 -8.80E-07 -9.00E-07 -9.10E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -8.78E-07 -9.29E-07 -9.75E-07 -1.01E-06 -1.04E-06 -1.04E-06 -1.02E-06 -8.39E-07

Licensee Comments: none





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Mitigating Systems Performance Index, High Pressure Injection System 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
UAI (ΔCDF) 7.10E-07 5.90E-07 -7.60E-08 -1.40E-07 -1.50E-07 -1.30E-07 2.10E-07 2.10E-07
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 4.90E-07 3.70E-07 -2.96E-07 -3.60E-07 -3.70E-07 -3.50E-07 -1.00E-08 -1.00E-08

Licensee Comments: none





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Mitigating Systems Performance Index, Heat Removal System 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
UAI (ΔCDF) -1.10E-08 -9.90E-09 -9.90E-09 2.40E-08 2.50E-08 2.20E-08 1.10E-08 6.70E-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 -2.30E-08 -2.19E-08 -2.19E-08 1.20E-08 1.30E-08 1.00E-08 -1.00E-09 -5.30E-09

Licensee Comments: none





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Mitigating Systems Performance Index, Residual Heat Removal System 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
UAI (ΔCDF) -6.20E-08 -5.00E-08 2.30E-08 -1.90E-08 -2.00E-08 -8.20E-09 -1.10E-08 -1.30E-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 -1.03E-06 -1.02E-06 -9.47E-07 -9.89E-07 -9.90E-07 -9.78E-07 -9.81E-07 -9.83E-07

Licensee Comments: none





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Mitigating Systems Performance Index, Cooling Water Systems 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
UAI (ΔCDF) 4.20E-07 4.00E-07 2.20E-07 2.30E-07 2.20E-07 2.30E-07 4.70E-07 5.20E-07
URI (ΔCDF) -3.70E-06 -3.70E-06 -3.70E-06 -3.70E-06 -3.70E-06 -3.70E-06 -1.70E-06 -1.70E-06
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -3.28E-06 -3.30E-06 -3.48E-06 -3.47E-06 -3.48E-06 -3.47E-06 -1.23E-06 -1.18E-06

Licensee Comments: none





Link to Notes

Reactor Coolant System Activity 7/06 8/06 9/06 10/06 11/06 12/06 1/07 2/07 3/07 4/07 5/07 6/07
Maximum activity 0.003070 0.003680 0.003400 0.003590 0.003550 0.004240 0.004070 0.004260 0.004540 0.004440 0.004350 0.004910
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 0.9 1.1 1.0 1.0 1.0 1.2 1.2 1.2 1.3 1.3 1.2 1.4
Reactor Coolant System Activity 7/07 8/07 9/07 10/07 11/07 12/07 1/08 2/08 3/08 4/08 5/08 6/08
Maximum activity 0.004440 0.004150 0.004400 0.004710 0.001680 0.002100 0.001940 0.002230 0.002140 0.002220 0.002380 0.002470
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 1.2 1.3 1.3 0.5 0.6 0.6 0.6 0.6 0.6 0.7 0.7

Licensee Comments: none





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Reactor Coolant System Leakage 7/06 8/06 9/06 10/06 11/06 12/06 1/07 2/07 3/07 4/07 5/07 6/07
Maximum leakage 0.106 0.083 0.078 0.096 0.083 0.167 0.087 0.123 0.106 0.076 0.075 0.096
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 1.1 0.8 0.8 1.0 0.8 1.7 0.9 1.2 1.1 0.8 0.8 1.0
Reactor Coolant System Leakage 7/07 8/07 9/07 10/07 11/07 12/07 1/08 2/08 3/08 4/08 5/08 6/08
Maximum leakage 0.076 0.079 0.074 0.060 0.335 0.106 0.108 0.108 0.171 0.092 0.103 0.077
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 0.8 0.8 0.7 0.6 3.4 1.1 1.1 1.1 1.7 0.9 1.0 0.8

Licensee Comments: none





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Drill/Exercise Performance 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
Successful opportunities 50.0 211.0 65.0 15.0 38.0 3.0 62.0 29.0
Total opportunities 52.0 214.0 66.0 16.0 40.0 4.0 63.0 30.0
                 
Indicator value 95.6% 96.7% 96.8% 97.2% 97.5% 97.5% 97.7% 97.5%

Licensee Comments: none





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ERO Drill Participation 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
Participating Key personnel 55.0 59.0 61.0 57.0 62.0 61.0 58.0 56.0
Total Key personnel 55.0 59.0 61.0 57.0 62.0 61.0 58.0 56.0
                 
Indicator value 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%

Licensee Comments: none





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Alert & Notification System 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/08
Successful siren-tests 1242 1248 1246 1244 1245 1245 1248 1247
Total sirens-tests 1248 1248 1248 1248 1248 1247 1248 1248
                 
Indicator value 99.2% 99.4% 99.3% 99.8% 99.8% 99.8% 99.8% 99.9%

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Occupational Exposure Control Effectiveness 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/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

Licensee Comments: none





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RETS/ODCM Radiological Effluent 3Q/06 4Q/06 1Q/07 2Q/07 3Q/07 4Q/07 1Q/08 2Q/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





Physical Protection information not publicly available.


 
 
 
 

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Last Modified: August 4, 2008