ML22308A196
| ML22308A196 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| 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
Enclosure 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.
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
Enclosure 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.
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 Responses Additional Audit Questions - Q1 and Q2 Responses Additional Audit Questions - Q1, Q2, and Q4 Responses Additional Audit Questions - Q1, Q2, and Q4 Responses Audit Document Request 1, 2, 3, and 7
Response
FDE-AR Mechanical Analysis Group, Appendix A, Items 1, 2, 3, and 7 Audit Document Request 4, 6, and Questions, 1 and 2 Response to NRC Audit Questions, February 7, 2022 Audit Document Request 5 Response Monticello ATRIUM 11 Methods Audit Action Item Tracking - Item #5 Audit Document Request 8 and Audit Question 3 and 4 Response Response to NRC Audit Questions, February 7, 2022 Audit Document Request 10 and Audit Questions 5, 6, 7, 8, and 9 Audit Document Request 10 and Audit Questions 5, 6, 7, 8, and 9 Audit Question 10 Response Monticello ATRIUM 11 Methods Audit Action Item Tracking - Item #10 Audit Question 11 Response Technical Audit by the NRC of Monticello Advanced Methods LAR - Q11, February 7, 2022 Framatome Method Overview Presentation Overview of Framatome Methods for Monticello LAR Audit, February 7, 2022 FS1-0014720, Revision 3.0 Generic BWR Fuel Assembly Liftoff Analysis for Normal, Anticipated Operational Occurrences and Accident Conditions FS1-0018154, Revision 3.0 Fuel Rod Bow ATRIUM 11 FS1-0034030, Revision 1.0 Guidelines for Input Development and Problem Execution for AURORA-B Loss of Coolant 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 FS1-0048277, Revision 2.0 Monticello ATRIUM 11 Characterization, Compatibility, and Thermal-Hydraulic Data for Mechanical Design FS1-0051811, Revision 1.0 Axial Growth, Generic ATRIUM 11 with Enhanced Load Chain (ELC), Stress Relieved Annealed Cladding with Chromia-Doped Pellets, BWR3 FS1-0051894, Revision 1.0 ATRIUM 11 Fuel Design Dimensional Compatibility, Monticello Unit 1 FS1-0052453, Revision 1.0 ATRIUM 11 ELC Fretting Disposition FS1-0052768, Revision 1.0 Mechanical Design Compliance Document for Monticello, ATRIUM 11 FS1-0053235, Revision 1.0 Monticello ATRIUM 11 LAR Equilibrium Fuel AUTOBOW for RODEX4 FS1-0053710, Revision 2.0 Fuel Rod Thermal-Mechanical Design Corroboration Document, Monticello LAR--
ATRIUM 11 FS1-0053712, Revision 1.0 Fuel Rod Thermal-Mechanical Analysis, Monticello LAR--ATRIUM 11 FS1-0054918, Revision 1.0 Monticello Accident Analysis, ATRIUM 11 FS1-0055032, Revision 1.0 Monticello ATRIUM 11 Introduction - LOCA Break Spectrum Analysis FS1-0055033, Revision 1.0 Monticello ATRIUM 11 Introduction - Exposure-Dependent LOCA Analysis FS1-0055186, Revision 1.0 Adjustment of power dependent hydrogen pick up fraction to total hydrogen uptake Monticello Advanced Methods LAR Audit Document Map Monticello Advanced Methods LAR Audit Document Map Monticello Audit Plan Advanced Methods LAR and Responses Q13, Q14, and Q16 Monticello Audit Plan Advanced Methods LAR 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