ML24157A056
| ML24157A056 | |
| Person / Time | |
|---|---|
| Issue date: | 06/13/2024 |
| From: | George Khouri NRC/RGN-II/DCI |
| To: | |
| References | |
| Download: ML24157A056 (13) | |
Text
June 13, 2024 Workshop on Vendor Oversight 1
Safety Culture Issues at Lake Charles Module Fabrication Facility - Impact on Vogtle and VC Summer George Khouri Construction Project Manager Division of Construction Oversight Region II, Atlanta
Outline
- Structural Module Overview
- Timeline (module fabrication facility, combined license issuance, and setting of the first module)
- Discuss Consequences of Safety Culture Issues 2
AP1000 Site Layout 3
CA20 - Auxiliary Building Areas 5 & 6 4
CA01 Steam Generator & Refueling Canal Module 5
Vogtle Unit 3 CA20 6
Vogtle Unit 3 CA01 and CA20 7
Vogtle Unit 3 8
Timeline
- Initial plans were for Lake Charles facility to manufacture structural and mechanical, ASME type, modules.
- Safety related fabrication started in early 2010.
- ASME certification was projected for 2010.
- Vogtle was anticipating the first CA20 sub-module in July 2010 and V.C. Summer (VCS) by November 2010.
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Timeline
- Vogtle Unit 3 CA20 was set in March 2014 and May 2014 for VCS Unit 2.
- Quality issues discovered during NRC inspections have been documented in publicly available inspection reports.
- Nonconformances were resolved in accordance with applicable codes and standards, and in compliance with NRC regulations prior to fuel load.
- In 2024, the NRC completed a 10 CFR Part 52 Construction Lessons-Learned Report (ML23325A202).
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Safety Culture Issues Consequences
- Impact of Safety Culture Issues at Lake Charles Module Fabrication Facility on the AP1000 Construction Sites:
- Schedule delays
- Increased NRC oversight (both at Lake Charles and at the sites)
- CB&I Confirmatory Order EA-13-196 required additional training of site personnel
- Observed impact on moral of CB&I personnel at the site (increased allegation intake from the sites) 11
Safety Culture Issues Consequences
- Impact of Safety Culture Issues (cont.):
- Licensees created additional quality control inspection teams.
- Licensees needed to adjust their original module fabrication plans:
- New manufacturing facilities were needed to complete the module fabrication (for both ASME mechanical and structural modules).
- Numerous fabrication nonconformances required rework at the sites.
- Some modules were intentionally shipped to the sites partially complete.
- CA20 module was set > 2 years after the COL was issued, some delays could be attributed to safety culture issues.
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Questions ?
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