ML21188A212
| ML21188A212 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 07/07/2021 |
| From: | NRC/NRR/VPOB |
| To: | |
| Gaslevic J | |
| References | |
| Download: ML21188A212 (5) | |
Text
CONSTRUCTION REACTOR OVERSIGHT PROCESS RESOURCES The U.S. Nuclear Regulatory Commission (NRC) staff originally estimated that direct inspection will require 35,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> per unit over the course of a 5-year nuclear power plant construction project. As of July 7, 2021, revised estimates are approximately 42,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for Vogtle Unit 3 and 27,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> for Vogtle Unit 4. These revised estimates include:
- 19,200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> for inspections related to ITAAC for Vogtle Unit 3, and 11,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for Vogtle Unit 4;
- 12,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> for construction and operational program inspections for Vogtle Unit 3, and 6,800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> for Vogtle Unit 4;
- 5,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> for reactive inspections above the baseline program in response to licensee performance issues, allegations, and nonperformance issues or events;
- and 5,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> for technical support of construction inspections.
Table 1 and figure 1 show the total number of direct inspection hours expended through July 7, 2021, for Vogtle Units 3 and 4.
Table 1: Actual Total Construction Inspection Program Resource Expenditures Unit ITAAC Inspection Program Reactive/Allegation- Technical Total Hours/Percentage Inspections Related Inspections Support*
of Planned Inspections Vogtle, 17,098 / 89% 10,552 660 2,200 30,510 Unit 3 Vogtle, 7,993 / 72% 5,810 454 1,397 15,654 Unit 4
- To date, NRC Headquarters technical staff inspection support has not been linked to a specific docket and has not been fee billable. Therefore, it is not possible to distinguish the technical support hours expended by the Office of Nuclear Reactor Regulation on each unit. In Table 1, the total hours expended on technical support have been split between the units.
July 7, 2021 35000 30000 25000 20000 15000 10000 5000 0
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2021 Proj Hours Vogtle, Unit 3, Cumulative Data Vogtle, Unit 4, Cumulative Data Figure 1 Total cumulative direct inspection hours for Vogtle, Unit 3 and 4 20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2021 Vogtle, Unit 3, ITAAC direct inspections Proj Hours Vogtle, Unit 4, ITAAC direct inspections Figure 2 Cumulative ITAAC-related direct inspection hours for Vogtle, Units 3 and 4 Figure 2 summarizes the direct inspection hours expended for inspections related to ITAAC since the start of construction at Vogtle Units 3 and 4. The staff estimates that there will be approximately 19,200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> of direct inspection related to ITAAC for Unit 3 and 11,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> of direct inspection related to ITAAC for Unit 4.
18000 16000 14000 12000 10000 8000 6000 4000 2000 0
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2021 Proj Hours Vogtle, Unit 4, Program direct inspection Vogtle, Unit 4, QA direct inspection Vogtle, Unit 3, Program direct inspection Vogtle, Unit 3, QA direct inspection Figure 3 Cumulative quality assurance and program inspection for Vogtle, Units 3 and 4 Figure 3 summarizes the NRC staff resources in hours expended for programmatic inspection since the start of construction at Vogtle, Units 3 and 4. Based on Vogtles schedule, total cumulative program inspections are estimated at 12,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> for Vogtle Unit 3, and 6,800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> for Unit 4.
3000 2500 2000 1500 1000 500 0
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2021 Proj Hours Vogtle, Unit 3, Reactive and Allegations Vogtle, Unit 3, HQ Technical Support Vogtle, Unit 4, Reactive and Allegations Vogtle, Unit 4, HQ Technical Support Figure 4 Cumulative reactive and technical support hours for Vogtle, Units 3 and 4 Figure 4 summarizes the direct inspection hours expended for reactive and allegation inspections and hours spent providing technical support for inspections since the start of construction at Vogtle, Units 3 and 4. The staff has not identified a need to revise the estimate of 5,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> for reactive inspections above the baseline program in response to licensee performance issues, allegations, and nonperformance issues or events, or the 5,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> estimated for technical support for construction inspections.