ML21287A095
| ML21287A095 | |
| Person / Time | |
|---|---|
| Issue date: | 10/14/2021 |
| From: | NRC/NRR/VPOB |
| To: | |
| Gaslevic J | |
| References | |
| Download: ML21287A095 (5) | |
Text
October 14, 2021 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 October 14, 2021, revised estimates are approximately 42,400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> for Vogtle Unit 3 and 28,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for Vogtle Unit 4. These revised estimates include:
19,300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 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; 13,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for construction and operational program inspections for Vogtle Unit 3, and 7,000 hours0 days <br />0 hours <br />0 weeks <br />0 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 October 14, 2021, for Vogtle Units 3 and 4.
Table 1: Actual Total Construction Inspection Program Resource Expenditures Unit ITAAC Inspection Hours/Percentage of Planned Inspections Program Inspections Reactive/Allegation-Related Inspections Technical Support*
Total
- Vogtle, Unit 3 17,479 / 91%
10,825 663 2,200 31,167
- Vogtle, Unit 4 8,062 / 73%
5,986 454 1,397 15,899
- 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.
Figure 1 Total cumulative direct inspection hours for Vogtle, Unit 3 and 4 0
5000 10000 15000 20000 25000 30000 35000 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2021 Proj Hours Vogtle, Unit 3, Cumulative Data Vogtle, Unit 4, Cumulative Data 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 19,300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 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.
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Vogtle, Unit 3, ITAAC direct inspections Vogtle, Unit 4, ITAAC direct inspections 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 13,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for Vogtle Unit 3, and 7,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> for Unit 4.
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 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 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.
0 500 1000 1500 2000 2500 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Vogtle, Unit 3, Reactive and Allegations Vogtle, Unit 3, HQ Technical Support Vogtle, Unit 4, Reactive and Allegations Vogtle, Unit 4, HQ Technical Support