ML19038A463

Construction Reactor Oversight Process Resources

ML19038A463
Person / Time
Site:	Vogtle
Issue date:	02/07/2019
From:	NRC/NRO/DCIP/CIPB
To:
Cozens I, NRO/DCIP
References
Download: ML19038A463 (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. Revised estimates due to delays in schedule and construction of the first of a kind power plant are now estimated to be 44,600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> for Vogtle Unit 3 and 34,200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> for Vogtle Unit 4. These revised estimates include:

• 22,500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> for inspections related to Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC) for Vogtle Unit 3, and 15,900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> for Vogtle Unit 4;

• 12,100 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 8,300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-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 lists the total number of direct inspection hours expended through CY 2018 for Vogtle, Units 3 and 4. Figure 1 shows this information in a graph.

Table 1 Actual Total Construction Inspection Program Resource Expenditures Calendar Years 2011-2018 (Hours)

Unit ITAAC Inspection Program Reactive/Allegation-Related Technical Total Hours/Percentage Inspections Inspections Support*

of Planned Inspections Vogtle, 11,269/50% 7,030 552 1,846 20,697 Unit 3 Vogtle, 5,795/37% 4,297 301 945 11,338 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 New Reactors on each unit. In Table 1, the total hours expended on technical support have been prorated between the units under construction based on total inspection hours.

Figure 1 Total cumulative direct inspection hours for Vogtle, Units 3 and 4 2

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. Through careful inspection planning in coordination with construction schedules, the staff has been able to refine its estimate of the direct inspection hours required for ITAAC inspection. The staff expects that efficiencies in the inspection process will continue to result in a lower number of actual direct inspection hours than planned. The staff estimates that there will be approximately 22,500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> of direct inspection related to ITAAC for Unit 3 and 15,900 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, based on detailed planned hours and efficiencies that have been observed between planned and actual hours. The staff has expended approximately 50 percent of the total number of planned ITAAC direct inspection hours at Vogtle, Unit 3, and 37 percent of the planned hours at Vogtle, Unit 4.

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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. The staff performs construction QA inspections annually in accordance with Inspection Procedure 35007, Quality Assurance Program Implementation during Construction and Pre-Construction Activities, dated December 8, 2016 (Agencywide Documents Access and Management System Accession No. ML16285A443). Based on Vogtles detailed schedule, program inspections are estimated at 12,100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> for Vogtle Unit 3, and 8,300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> for Unit 4.

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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.

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