United States Nuclear Regulatory Commission - Protecting People and the Environment

Oconee 2 – Quarterly Performance Indicators

2Q/2017 Performance Indicators

The solid trend line represents the current reporting period.

Licensee's General Comments: none

On this page:

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 0 0 0 0 0 0 0
Critical hours 2194.9 1592.5 2183.0 2184.0 2208.0 2209.0 2159.0 2184.0
                 
Indicator value 0 0 0 0 0 0 0 0

To top of page

Licensee Comments: none


Link to Notes

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 1.0 0 0 0 0 0 0 0
Critical hours 2194.9 1592.5 2183.0 2184.0 2208.0 2209.0 2159.0 2184.0
                 
Indicator value 0.8 0.9 0.9 0.9 0 0 0 0

To top of page

Licensee Comments:
3Q/15: Corrected to count 1 power change. No color change occurred.




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 0
                 
                 
Indicator value 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

To top of page

Licensee Comments: none




Link to Notes

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 0 0 0 0 0
                 
Indicator value 0 0 0 0 0 0 0 0

To top of page

Licensee Comments: none




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) 1.90E-07 2.08E-07 2.22E-07 2.19E-07 1.00E-07 1.27E-07 1.22E-07 1.36E-07
URI (ΔCDF) -4.30E-08 -4.30E-08 -4.30E-08 1.75E-07 2.92E-08 -2.96E-08 -2.96E-08 -2.96E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 1.50E-07 1.70E-07 1.80E-07 3.90E-07 1.30E-07 9.70E-08 9.30E-08 1.10E-07

To top of page

Licensee Comments:
4Q/16: Changed PRA Parameter(s). The following comments should have been included with the Oconee third quarter submittal. The Oconee Units 1, 2, and 3 PRA Model, Revision 7, was approved on 4/1/16, and a corresponding MSPI Basis Document Revision 18 was approved on 10/6/16. As a result of the PRA model change, the CDF, Fussel-Vesely, and Basic Event Probabilities for all monitored trains and components were revised. The changes were entered into CDE on 10/6/16, and the changes are effective for third quarter 2016.
3Q/16: Changed PRA Parameter(s). Planned UA Baseline was updated to be applied to 4th quarter 2016 per revised MSPI Basis Document.




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) -7.67E-10 -7.67E-10 -7.67E-10 -7.67E-10 -4.72E-10 -4.31E-10 -2.57E-10 -6.95E-11
URI (ΔCDF) -1.51E-07 -1.51E-07 -1.51E-07 -1.51E-07 -1.01E-07 -1.01E-07 -1.01E-07 -1.01E-07
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -1.50E-07 -1.50E-07 -1.50E-07 -1.50E-07 -1.00E-07 -1.00E-07 -1.00E-07 -1.00E-07

To top of page

Licensee Comments:
4Q/16: Changed PRA Parameter(s). The following comments should have been included with the Oconee third quarter submittal. The Oconee Units 1, 2, and 3 PRA Model, Revision 7, was approved on 4/1/16, and a corresponding MSPI Basis Document Revision 18 was approved on 10/6/16. As a result of the PRA model change, the CDF, Fussel-Vesely, and Basic Event Probabilities for all monitored trains and components were revised. The changes were entered into CDE on 10/6/16, and the changes are effective for third quarter 2016. The planned unavailability baseline for the high pressure injection (HPI) system was revised and the baseline changes were incorporated into the PRA model and the MSPI Basis Document Revision 18. The changes were entered into CDE on 10/6/16 and will be effective in the first quarter of 2017. Also, consistent with the PRA model changes, the B HPI pumps for all Oconee units were added as MSPI monitored components. The MSPI Basis Document revision 19 was approved on 10/18/16 to incorporate these changes, and the corresponding changes were entered into CDE on October 18-19, 2016. The changes are effective for the third quarter 2016.
3Q/16: Changed PRA Parameter(s).




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) -5.06E-08 -5.12E-08 -3.62E-08 4.25E-08 2.48E-08 2.28E-08 3.35E-08 5.31E-08
URI (ΔCDF) -8.10E-08 9.27E-09 9.27E-09 9.27E-09 2.55E-08 2.55E-08 2.55E-08 2.55E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -1.30E-07 -4.20E-08 -2.70E-08 5.20E-08 5.00E-08 4.80E-08 5.90E-08 7.90E-08

To top of page

Licensee Comments:
4Q/16: Changed PRA Parameter(s). The following comments should have been included with the Oconee third quarter submittal. The Oconee Units 1, 2, and 3 PRA Model, Revision 7, was approved on 4/1/16, and a corresponding MSPI Basis Document Revision 18 was approved on 10/6/16. As a result of the PRA model change, the CDF, Fussel-Vesely, and Basic Event Probabilities for all monitored trains and components were revised. The changes were entered into CDE on 10/6/16, and the changes are effective for third quarter 2016.
3Q/16: Changed PRA Parameter(s).




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) 3.87E-07 4.08E-07 3.20E-07 4.28E-07 2.91E-07 2.24E-07 2.19E-07 1.93E-07
URI (ΔCDF) -1.12E-07 -1.12E-07 -1.12E-07 -1.12E-07 -6.93E-08 -6.93E-08 -6.93E-08 -6.93E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value 2.80E-07 3.00E-07 2.10E-07 3.20E-07 2.20E-07 1.50E-07 1.50E-07 1.20E-07

To top of page

Licensee Comments:
2Q/17: The planned unavailability baseline for the residual heat removal (RHR) system was revised to remove UA hours that were previously added due to significant maintenance evolutions that are performed at an interval greater than the 3-year monitoring period. The maintenance evolutions have rolled off the 3-year monitoring period. The baseline changes were incorporated into the MSPI Basis Document Revision 22, dated 5/2/17. The changes are bounded by the existing PRA model, so a PRA model update is not required. The changes were entered into CDE effective third quarter 2017.
4Q/16: Changed PRA Parameter(s). The following comments should have been included with the Oconee third quarter submittal. The Oconee Units 1, 2, and 3 PRA Model, Revision 7, was approved on 4/1/16, and a corresponding MSPI Basis Document Revision 18 was approved on 10/6/16. As a result of the PRA model change, the CDF, Fussel-Vesely, and Basic Event Probabilities for all monitored trains and components were revised. The changes were entered into CDE on 10/6/16, and the changes are effective for third quarter 2016. The planned unavailability baseline for the residual heat removal (RHR) system was revised and the baseline changes were incorporated into the PRA model and the MSPI Basis Document Revision 18. The changes were entered into CDE on 10/6/16 and will be effective in the first quarter of 2017.
3Q/16: Changed PRA Parameter(s).




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) -4.27E-08 -2.21E-08 -1.10E-08 -6.17E-09 6.37E-11 -6.17E-10 -1.84E-09 -3.42E-09
URI (ΔCDF) -3.00E-08 -3.00E-08 -3.00E-08 -3.00E-08 -1.08E-08 -1.08E-08 -1.08E-08 -1.08E-08
PLE NO NO NO NO NO NO NO NO
                 
Indicator value -7.30E-08 -5.20E-08 -4.10E-08 -3.60E-08 -1.10E-08 -1.10E-08 -1.30E-08 -1.40E-08

To top of page

Licensee Comments:
4Q/16: Changed PRA Parameter(s). The following comments should have been included with the Oconee third quarter submittal. The Oconee Units 1, 2, and 3 PRA Model, Revision 7, was approved on 4/1/16, and a corresponding MSPI Basis Document Revision 18 was approved on 10/6/16. As a result of the PRA model change, the CDF, Fussel-Vesely, and Basic Event Probabilities for all monitored trains and components were revised. The changes were entered into CDE on 10/6/16, and the changes are effective for third quarter 2016. On 10/19/16, risk metrics for the Cooling Water System were recalculated using the method described for making corrections to FV/UA and FV/UR ratios for fault trees using modeling method 2 as described in NEI 99-02. The MSPI Basis Document revision 20 was approved on 10/19/16, and the corresponding changes were entered into CDE on 10/19/16. The changes are effective for the third quarter 2016.
3Q/16: Changed PRA Parameter(s).




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 0.000231 0.000294 0.000299 0.000317 0.000110 0.000165 0.000201 0.000366 0.000164 0.000123 0.000134 0.000130
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 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 0.000287 0.000151 0.000144 0.000219 0.000189 0.000249 0.000235 0.000265 0.000234 0.000198 0.000320 0.000371
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 0 0 0 0 0 0

To top of page

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 0.090 0.042 0.047 0.063 0.091 0.071 0.071 0.048 0.032 0.042 0.024 0.028
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 0.9 0.4 0.5 0.6 0.9 0.7 0.7 0.5 0.3 0.4 0.2 0.3
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 0.020 0.021 0.028 0.043 0.018 0.016 0.045 0.063 0.040 0.037 0.027 0.040
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 0.2 0.2 0.3 0.4 0.2 0.2 0.5 0.6 0.4 0.4 0.3 0.4

To top of page

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 42.0 52.0 63.0 25.0 39.0 10.0 11.0 0
Total opportunities 44.0 54.0 63.0 26.0 43.0 10.0 11.0 0
                 
Indicator value 97.2% 96.8% 97.4% 97.2% 96.1% 96.4% 96.8% 96.4%

To top of page

Licensee Comments: none




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 131.0 129.0 124.0 129.0 130.0 129.0 129.0 134.0
Total Key personnel 131.0 129.0 124.0 129.0 130.0 129.0 129.0 134.0
                 
Indicator value 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%

To top of page

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 1753 1817 1752 1754 1754 1727 1754 1753
Total sirens-tests 1755 1820 1755 1755 1755 1727 1755 1755
                 
Indicator value 99.7% 99.7% 99.9% 99.9% 99.9% 99.9% 100.0% 99.9%

To top of page

Licensee Comments: none




Link to Notes

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

To top of page

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

To top of page

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