United States Nuclear Regulatory Commission - Protecting People and the Environment

Arkansas Nuclear 1 – Quarterly Performance Indicators

2Q/2017 Performance Indicators

The solid trend line represents the current reporting period.

Licensee's General Comments: none

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Link to Notes

Unplanned Scrams per 7000 Critical Hrs 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Unplanned scrams 0 1.0 0 0 0 0 0 1.0
Critical hours 2208.0 2141.3 2183.0 2184.0 2040.1 464.1 2159.0 1677.8
                 
Indicator value 0 0.9 0.8 0.8 0.8 0 0 1.1

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Licensee Comments: none


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Unplanned Power Changes per 7000 Critical Hrs 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Unplanned power changes 0 0 0 0 0 0 1.0 0
Critical hours 2208.0 2141.3 2183.0 2184.0 2040.1 464.1 2159.0 1677.8
                 
Indicator value 0 0 0 0 0 0 1.0 1.1

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Licensee Comments: none




Link to Notes

Unplanned Scrams with Complications 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Scrams with complications 0 0 0 0 0 0 0 1.0
                 
                 
Indicator value 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0

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Licensee Comments: none




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Safety System Functional Failures (PWR) 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Safety System Functional Failures 0 0 0 1 0 2 0 0
                 
Indicator value 0 0 0 1 1 3 3 2

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Licensee Comments:
4Q/16: October: Licensing Event Report 50-313 2016-003-00, November: Licensing Event Report 50-313 2016-004-00
2Q/16: LER 50-313/2016-001-00




Link to Notes

Mitigating Systems Performance Index, Emergency AC Power System 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
UAI (ΔCDF) -7.00E-10 5.40E-10 5.36E-10 -4.95E-10 -6.70E-09 5.62E-09 -4.77E-09 -4.51E-09
URI (ΔCDF) -2.04E-08 -2.05E-08 -2.02E-08 -1.46E-08 -1.01E-07 -4.20E-08 -3.50E-08 -2.91E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -2.10E-08 -2.00E-08 -2.00E-08 -1.50E-08 -1.10E-07 -3.60E-08 -4.00E-08 -3.40E-08

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Licensee Comments:
3Q/16: Changed PRA Parameter(s). Revision to Unit CDF, Unavailability FV/UA values and Unreliability FV/UA values.




Link to Notes

Mitigating Systems Performance Index, High Pressure Injection System 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
UAI (ΔCDF) -8.24E-12 -8.23E-12 -8.26E-12 -8.49E-12 -3.43E-12 -3.34E-12 1.53E-12 1.76E-12
URI (ΔCDF) 4.21E-09 4.19E-09 4.16E-09 4.05E-09 2.80E-08 2.77E-08 1.30E-07 1.65E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 4.20E-09 4.20E-09 4.20E-09 4.00E-09 2.80E-08 2.80E-08 1.30E-07 1.70E-07

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Licensee Comments:
1Q/17: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, and January 2016, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, March 2015, and August 2016, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, and March 2016, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
4Q/16: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, and January 2016, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, March 2015, and August 2016, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, and March 2016, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
3Q/16: Revision to Unit Core Damage Frequency, Unavailability FV/UA values, Unreliability FV/UA values and Estimated Reliability values. ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, and January 2016, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, March 2015, and August 2016, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, and March 2016, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
3Q/16: Changed PRA Parameter(s). Revision to Unit CDF, Unavailability FV/UA values, Unreliability FV/UA values and Estimated Reliability values.
2Q/16: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, and January 2016, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, and March 2015, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, and March 2016, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
1Q/16: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, and January 2016, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, and March 2015, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, and March 2016, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
4Q/15: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, and March 2015, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.
3Q/15: ANO-1 high pressure injection (HPI) system reliability for the A HPI pump in December 2014, was revised. ANO-1 HPI system reliability for the B HPI pump in July 2014, November 2014, and March 2015, was revised. ANO-1 HPI system reliability for the C HPI pump in August 2014, was revised. Test demands and run hours were revised to remove demands related to post-maintenance testing. This change does not affect the color of this indicator.




Link to Notes

Mitigating Systems Performance Index, Heat Removal System 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
UAI (ΔCDF) -1.14E-09 -3.57E-09 -6.33E-09 -3.95E-09 -3.64E-08 -2.69E-08 5.27E-09 1.72E-08
URI (ΔCDF) -2.14E-08 -2.19E-08 -2.22E-08 -2.29E-08 -4.88E-08 -5.41E-08 -5.45E-08 -5.58E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -2.30E-08 -2.50E-08 -2.90E-08 -2.70E-08 -8.50E-08 -8.10E-08 -4.90E-08 -3.90E-08

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Licensee Comments:
3Q/16: Changed PRA Parameter(s). Revision to Unit CDF, Unavailability FV/UA values, Unreliability FV/UA values, and Devices in-scope.




Link to Notes

Mitigating Systems Performance Index, Residual Heat Removal System 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
UAI (ΔCDF) 5.06E-08 4.80E-08 5.48E-08 4.88E-08 6.14E-08 6.73E-08 3.06E-08 3.56E-08
URI (ΔCDF) 3.86E-08 4.25E-08 -4.54E-08 -3.77E-08 -3.16E-08 -4.08E-08 -4.09E-08 -4.47E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 8.90E-08 9.00E-08 9.40E-09 1.10E-08 3.00E-08 2.70E-08 -1.00E-08 -9.00E-09

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Licensee Comments:
3Q/16: Changed PRA Parameter(s). Revision to Unit CDF, Unavailability FV/UA values, Unreliability FV/UA values, Common Cause Failure values and Devices in-scope.




Link to Notes

Mitigating Systems Performance Index, Cooling Water Systems 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
UAI (ΔCDF) -3.39E-09 -3.39E-09 -3.39E-09 -3.40E-09 -1.11E-07 -1.11E-07 -8.13E-08 -8.06E-08
URI (ΔCDF) 6.47E-08 6.47E-08 6.47E-08 6.48E-08 2.38E-07 2.34E-07 2.30E-07 2.24E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 6.10E-08 6.10E-08 6.10E-08 6.10E-08 1.30E-07 1.20E-07 1.50E-07 1.40E-07

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Licensee Comments:
3Q/16: Changed PRA Parameter(s). Revision to Unit CDF, Unavailability FV/UA values, Unreliability FV/UA values, Common Cause Failure values, Devices in-scope and Function revised for three segments vs. two trains.




Link to Notes

Reactor Coolant System Activity 7/15 8/15 9/15 10/15 11/15 12/15 1/16 2/16 3/16 4/16 5/16 6/16
Maximum activity 0.000220 0.000208 0.000143 0.000140 0.000194 0.034700 0.000122 0.000153 0.000173 0.000166 0.000214 0.000207
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 3.5 0 0 0 0 0 0
Reactor Coolant System Activity 7/16 8/16 9/16 10/16 11/16 12/16 1/17 2/17 3/17 4/17 5/17 6/17
Maximum activity 0.000222 0.000290 0.026800 N/A N/A 0.000049 0.000052 0.000057 0.000059 0.000061 0.000069 0.000066
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 2.7 N/A N/A 0 0 0 0 0 0 0

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Licensee Comments: none




Link to Notes

Reactor Coolant System Leakage 7/15 8/15 9/15 10/15 11/15 12/15 1/16 2/16 3/16 4/16 5/16 6/16
Maximum leakage 0.163 0.168 0.177 0.175 0.182 0.198 0.132 0.128 0.116 0.125 0.121 0.125
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 1.6 1.7 1.8 1.8 1.8 2.0 1.3 1.3 1.2 1.3 1.2 1.3
Reactor Coolant System Leakage 7/16 8/16 9/16 10/16 11/16 12/16 1/17 2/17 3/17 4/17 5/17 6/17
Maximum leakage 0.134 0.131 0.117 N/A N/A 0.132 0.135 0.131 0.135 0.134 0.495 1.050
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 1.3 1.3 1.2 N/A N/A 1.3 1.4 1.3 1.4 1.3 5.0 10.5

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Licensee Comments: none




Link to Notes

Drill/Exercise Performance 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Successful opportunities 65.0 19.0 31.0 98.0 63.0 5.0 60.0 39.0
Total opportunities 67.0 19.0 32.0 99.0 65.0 5.0 62.0 39.0
                 
Indicator value 97.2% 97.2% 97.6% 97.6% 97.6% 97.3% 97.1% 97.9%

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Licensee Comments:
2Q/16: The 2nd Quarter 2016 June Drill/Exercise Performance is being revised to include five additional opportunities. This change does not affect the color of the Drill/Exercise Performance indicator.




Link to Notes

ERO Drill Participation 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Participating Key personnel 106.0 103.0 103.0 108.0 107.0 111.0 107.0 109.0
Total Key personnel 106.0 103.0 103.0 108.0 107.0 111.0 107.0 109.0
                 
Indicator value 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%

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Licensee Comments: none




Link to Notes

Alert & Notification System 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
Successful siren-tests 147 146 147 147 147 147 147 147
Total sirens-tests 147 147 147 147 147 147 147 147
                 
Indicator value 99.8% 99.8% 99.8% 99.8% 99.8% 100.0% 100.0% 100.0%

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Licensee Comments: none




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Occupational Exposure Control Effectiveness 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
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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Licensee Comments: none




Link to Notes

RETS/ODCM Radiological Effluent 3Q/15 4Q/15 1Q/16 2Q/16 3Q/16 4Q/16 1Q/17 2Q/17
RETS/ODCM occurrences 0 0 0 0 0 0 0 0
                 
Indicator value 0 0 0 0 0 0 0 0

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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.





 
 
 
 

Current data as of: July 26, 2017

Page Last Reviewed/Updated Wednesday, June 07, 2017