ML24157A056

Georges 2024 Workshop Presentation

ML24157A056
Person / Time
Issue date:	06/13/2024
From:	George Khouri NRC/RGN-II/DCI
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Download: ML24157A056 (13)

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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.

• The combined license (COL) for both VCS and Vogtle issued in early 2012.

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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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