ML21123A143

April 22, 2021, Summary of a Public Meeting with Southern Nuclear Operating Company

ML21123A143
Person / Time
Site:	Vogtle
Issue date:	05/05/2021
From:	Bill Gleaves NRC/NRR/VPOB
To:	Omar Lopez-Santiago NRC/NRR/VPOB
Gleaves B
References
ML21084A226, ML21116A059
Download: ML21123A143 (6)

Text

May 5, 2021 MEMORANDUM TO: Omar López-Santiago, Chief Vogtle Project Office Office of Nuclear Reactor Regulation Signed by Gleaves, William FROM: Billy Gleaves, Senior Project Manager on 05/05/21 Vogtle Project Office Office of Nuclear Reactor Regulation

SUMMARY

OF A PUBLIC MEETING WITH SOUTHERN NUCLEAR OPERATING COMPANY ON APRIL 22, 2021 The U.S. Nuclear Regulatory Commission (NRC) staff held an observation meeting public meeting with Southern Nuclear Operating Company (SNC) on April 22, 2021. The purpose of the meeting was a technical exchange to hear SNC describe the issue and the associated details associated with, and supporting, its potential request for an alternative to the American Society of Mechanical Engineers (ASME), Boiler and Pressure Vessel Code,Section III, for Vogtle Electric Generating Plant (VEGP), Unit 3. Key points were related to ASME Section III requirements, the treatment of unqualified material that may remain as part of the vessel after the repair, and potentially impacted inspections, tests, analyses, and acceptance criteria (ITAAC). NRC and SNC staff participated in the call. There were no members of the public who identified themselves at the meeting and no comments or questions were directed to the staff. The meeting ended at 9:55am EST.

The meeting notice can be found in the Agencywide Documents Access and Management System (ADAMS) Accession No. ML21084A226. The meeting notice was also posted on the NRC public website. Enclosures 1 and 2 are the meeting agenda and attendance list for the meeting, respectively.

The document referenced during the discussion can be found at the ADAMS Accession No.

given below:

SNC PowerPoint Presentation ML21116A059 CONTACT: W. Gleaves, NRR/VPO (301) 415-5848

O. López-Santiago During the meeting, SNC described the design, construction, ASME Code N-stamp certification of the containment vessel (CV), the completion of the structural integrity test, and the subsequent welding of six pieces of unistrut type steel shapes onto the CV, in three locations, by a non N-certificate holder, who was a contractor. The welds are 1/4 to 3/8 fillet welds, 4 long. The N-certificate holder, Chicago Bridge and Iron (CB&I) company, created a remediation plan, which required an alternative to certain subsections of the ASME Code,Section III, detailed in the presentation. Following the presentation, the main comment of the NRC staff was to provide information on the CB&I and Stone & Webster company quality assurance programs and commercial grade weld rod, if applicable.

The proposed ASME Code alternative should provide information on the fracture toughness (FT) of the E7018 welding material at the temperature of the base material FT tests. SNC should consider including a comparison of, and evaluation of the differences in, the strength and chemistry data for the E7018 weld material versus the E9018 weld material and the SA-738 Grade B CV material. SNC should consider providing additional information on the surface examination and vacuum box testing post repair and justification for no post repair volumetric examination. SNC should also consider demonstrating that the weld is acceptable, and the FT of the CV base material is not affected. The staff stated for ITAAC closure for the FT associated ITAAC, that it be properly documented and justified.

SNC confirmed its intention to have a pre-submittal meeting on this topic on April 29, 2021.

Docket No.: 52-025

Enclosures:

As stated cc w/encls: See next page

ML21123A143 *via e-mail NRR-106 OFFICE PM:NRR/VPO LA:NRR/VPO PM:NRR/VPO ABC:NRR/NVIB NAME WGleaves RButler CSantos* w/edits DWidrevitz DATE 5/3/21 5/5/21 5/5/21 5/5/21 OFFICE BC:NRR/VPO PM:NRR/VPO NAME OLópez-Santiago WGleaves DATE 5/5/21 5/5/21 AGENDA FOR PUBLIC MEETING U.S. NUCLEAR REGULATORY COMMISSION Thursday, April 22, 2021 Teleconference 9:00 a.m. - 12:00 p.m.

PURPOSE: To discuss issues associated with the safety review of licensing actions for Southern Nuclear Operating Companys (SNC) Vogtle Electric Generating Plant (VEGP) Units 3 and 4.

OPEN Time Topic Led By 9:00 a.m. Opening Remarks NRC 9:10 a.m. Discussion of Identified Topics NRC/SNC Opportunity for Public Comment NRC/Public Open Portion Concludes CLOSED (If needed) NRC/SNC 12:00 p.m. Adjourn Enclosure 1

PUBLIC MEETING U.S. NUCLEAR REGULATORY COMMISSION Thursday, April 22, 2021 Teleconference List of Attendees Name Organization Representing the Nuclear Regulatory Commission Armstrong, Garry Benson, Michael Davis, Bradley Fredette, Thomas Gaslevic, James Gleaves, Billy Griman, Brian Honcharik, John Jones, Steve NRR and Region II Khouri, George Lee, Brian López-Santiago, Omar McKenna, Philip Mitchell, Matthew Patel, Raju Welch, Christopher Widrevitz, Dan Wittick, Brian Representing SNC Burns, Evan Caver, Kyle Chapman, Nathan Dorsey, Keith Foley, Ryan Grant, Eddie Hall, Jason Harrelson, Jennifer Kellenberger, Nicholas Jimenez-Cueto, Juan Leighty, Steven Lockman, Steve Southern Nuclear Operating Company Mann, Elly Marrow, Calvin Meneely, Jennifer Murphy, Drew Musto, Tom Quarles, Adam Roberts, Kelli Sciulli, Justin Verkler, Jim Wilson, Mark Yox, Tom Enclosure 2

Representing SNC Contactors Gould, Andrew CB&I Southern Nuclear Operating Companys Hand, Steve CB&I contactors Presley, Lee CB&I Representing the Public None self-identified.

Note: All participated via teleconference.

2