ML22308A196

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Regulatory Audit Report Regarding License Amendment Request to Transition to Atrium 11 Fuel
ML22308A196
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 11/10/2022
From: Robert Kuntz
Plant Licensing Branch III
To: Domingos C
Northern States Power Company, Minnesota
Kuntz R
References
EPID L-2021-LLA-0144
Download: ML22308A196 (1)


Text

November 10, 2022 Mr. Christopher P. Domingos Site Vice President Northern States Power Company - Minnesota Monticello Nuclear Generating Plant 2807 West County Road 75 Monticello, MN 55362

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - REGULATORY AUDIT REPORT REGARDING LICENSE AMENDMENT REQUEST TO TRANSITION TO ATRIUM 11 FUEL (EPID L-2021-LLA-0144)

Dear Mr. Domingos:

By letter dated July 29, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21211A594), Xcel Energy (the licensee) submitted a license amendment request for Monticello Nuclear Generating Plant to allow application of the Framatome analysis methodologies necessary to support a planned transition to ATRIUM 11 fuel under the currently licensed extended flow window (EFW) operating domain.

The U.S. Nuclear Regulatory Commissions (NRCs) Office of Nuclear Reactor Regulation staff conducted an audit of the supporting analysis for license amendment request. The audit plan is available in ADAMS at Accession No. ML22067A203.

The audit was conducted virtually through conference calls and the use of an online portal from January 27 through February 25, 2022. The NRC staff held teleconferences with the licensee on February 1 and February 7, 2022, to discuss the documents on the portal.

The purpose of the audit was to gain understanding, to verify information, and to identify information that will require docketing to support the proposed licensing action. The enclosure to this letter provides a report of the NRC staffs audit.

Enclosure

C. Domingos If you have any questions, please contact me by telephone at (301) 415-3733 or by e-mail at Robert.Kuntz@nrc.gov.

Sincerely,

/RA/

Robert Kuntz, Senior Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-263

Enclosure:

Audit Report cc: Listserv

REGULATORY AUDIT REPORT TO SUPPORT REVIEW OF THE LICENSE AMENDMENT REQUEST REGARDING APPLICATION OF FRAMATOME METHODOLOGIES TO SUPPORT TRANSITION TO ATRIUM 11 FUEL MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 EPID L-2021-LLA-0144

1.0 BACKGROUND

By letter dated July 29, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21211A594), Xcel Energy (the licensee) submitted a license amendment request (LAR) for Monticello Nuclear Generating Plant (MNGP) to allow application of the Framatome analysis methodologies necessary to support a planned transition to ATRIUM 11 fuel under the currently licensed extended flow window (EFW) operating domain.

The U.S. Nuclear Regulatory Commission (NRC) staff conducted a regulatory audit in accordance with the Office of Nuclear Reactor Regulation (NRR) Office Instruction LIC-111, Regulatory Audits (ML19226A274). LIC-111states that a regulatory audit is a planned, licensed or regulation-related activity, that includes the examination of primarily non-docketed information with the intent to gain understanding, to verify information, or to identify information that will require docketing to support the basis of the licensing or regulatory decision.

2.0 SCOPE AND PURPOSE The audit was conducted virtually through conference calls and the use of an online portal from January 27 through February 25, 2022. The NRC staff held teleconferences with the licensee on February 1 and February 7, 2022, to discuss the documents on the portal.

The basis for the review was the LAR and the NRCs Standard Review Plan (SRP) chapter 15, Transient and Accident Analysis. The audit plan is available in ADAMS at Accession No. ML22067A203.

Enclosure

3.0 AUDIT TEAM The following NRC staff members participated in the audit:

Robert Kuntz, Senior Project Manager Diana Woodyatt, Technical Reviewer, Team Lead Ahsan Sallman, Technical Reviewer Mathew Panicker, Technical Reviewer Santosh Bhatt, Technical Reviewer Adam Rau, Technical Reviewer 4.0 AUDIT

SUMMARY

Technical discussions focused on the accident analysis supporting the LAR. During the audit, the NRC staff discussed questions associated with the LAR and included in the audit plan.

5.0 DOCUMENTS REVIEWED The following documents were reviewed by the NRC staff during the audit:

Document Identifier Description Additional Audit Questions - Q1 and Q2 Additional Audit Questions - Q1 and Q2 Responses Responses Additional Audit Questions - Q1, Q2, and Additional Audit Questions - Q1, Q2, and Q4 Q4 Responses Responses Audit Document Request 1, 2, 3, and 7 FDE-AR Mechanical Analysis Group, Appendix Response A, Items 1, 2, 3, and 7 Audit Document Request 4, 6, and Response to NRC Audit Questions, February 7, Questions, 1 and 2 2022 Monticello ATRIUM 11 Methods Audit Action Audit Document Request 5 Response Item Tracking - Item #5 Audit Document Request 8 and Audit Response to NRC Audit Questions, February 7, Question 3 and 4 Response 2022 Audit Document Request 10 and Audit Audit Document Request 10 and Audit Questions 5, 6, 7, 8, and 9 Questions 5, 6, 7, 8, and 9 Monticello ATRIUM 11 Methods Audit Action Audit Question 10 Response Item Tracking - Item #10 Technical Audit by the NRC of Monticello Advanced Methods LAR - Q11, February 7, Audit Question 11 Response 2022 Framatome Method Overview Overview of Framatome Methods for Monticello Presentation LAR Audit, February 7, 2022 Generic BWR Fuel Assembly Liftoff Analysis for Normal, Anticipated Operational Occurrences FS1-0014720, Revision 3.0 and Accident Conditions FS1-0018154, Revision 3.0 Fuel Rod Bow ATRIUM 11 Guidelines for Input Development and Problem Execution for AURORA-B Loss of Coolant FS1-0034030, Revision 1.0 Accident (LOCA)

Document Identifier Description FS1-0036347, Revision 3.0 ATRIUM 11 Fuel Assembly Handling FS1-0047932, Revision 1.0 Manufacturing Uncertainties for 2017/2018/2019 Monticello ATRIUM 11 Characterization, Compatibility, and Thermal-Hydraulic Data for FS1-0048277, Revision 2.0 Mechanical Design Axial Growth, Generic ATRIUM 11 with Enhanced Load Chain (ELC), Stress Relieved Annealed Cladding with Chromia-Doped Pellets, FS1-0051811, Revision 1.0 BWR3 ATRIUM 11 Fuel Design Dimensional FS1-0051894, Revision 1.0 Compatibility, Monticello Unit 1 FS1-0052453, Revision 1.0 ATRIUM 11 ELC Fretting Disposition Mechanical Design Compliance Document for FS1-0052768, Revision 1.0 Monticello, ATRIUM 11 Monticello ATRIUM 11 LAR Equilibrium Fuel FS1-0053235, Revision 1.0 AUTOBOW for RODEX4 Fuel Rod Thermal-Mechanical Design Corroboration Document, Monticello LAR--

FS1-0053710, Revision 2.0 ATRIUM 11 Fuel Rod Thermal-Mechanical Analysis, FS1-0053712, Revision 1.0 Monticello LAR--ATRIUM 11 FS1-0054918, Revision 1.0 Monticello Accident Analysis, ATRIUM 11 Monticello ATRIUM 11 Introduction - LOCA FS1-0055032, Revision 1.0 Break Spectrum Analysis Monticello ATRIUM 11 Introduction - Exposure-FS1-0055033, Revision 1.0 Dependent LOCA Analysis Adjustment of power dependent hydrogen pick FS1-0055186, Revision 1.0 up fraction to total hydrogen uptake Monticello Advanced Methods LAR Audit Monticello Advanced Methods LAR Audit Document Map Document Map Monticello Audit Plan Advanced Methods Monticello Audit Plan Advanced Methods LAR LAR and Responses Q13, Q14, and Q16 and Responses Q13, Q14, and Q16 6.0 AUDIT CONCLUSION There were no regulatory decisions made during the audit. There were no open items needing further clarification and no deviation from the audit plan.

Date: November 10, 2022

ML22308A196 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DSS/SNSB/BC (A)

NAME RKuntz SRohrer DWoodyatt DATE 11/04/2022 11/8/2022 11/9/2022 OFFICE NRR/DORL/LPL3/BC NRR/DORL/LPL3/PM NAME NSalgado (SWall for) RKuntz DATE 11/10/2022 11/10/2022