ML23156A188

Construction Reactor Oversight Process Resources Report June 5, 2023

ML23156A188
Person / Time
Site:	Vogtle
Issue date:	06/05/2023
From:	Office of Nuclear Reactor Regulation
To:
References
Download: ML23156A188 (3)

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 March 25, 2023, 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 28,700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 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 (at 100% completion),

and 10,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 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, including quality assurance for Vogtle Unit 3, and 7,800 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 March 25, 2023, 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 Support**

of Planned Inspections Inspections Vogtle, 19,300 / 100% 12,000 800 2,200 34,300 Unit 3*

Vogtle, 9,200 / 84% 6,800 600 1,400 18,000 Unit 4*

• The hours reported through March 25,2023 include adjustments to previous resources reports.

• • 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.

June 5, 2023 Figure 1 Total cumulative direct inspection hours for Vogtle, Unit 3 and 4 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 are 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 (at 100%

completion) and estimates there will be approximately 10,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> of direct inspection related to ITAAC for Unit 4.

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 7,800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> for Unit 4.

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.