L-MT-23-052, Subsequent License Renewal Application Supplement 7

Subsequent License Renewal Application Supplement 7

ML23334A147
Person / Time
Site:	Monticello
Issue date:	11/30/2023
From:	Hafen S Northern States Power Company, Minnesota, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-MT-23-052
Download: ML23334A147 (1)

Text

fl Xcel Energy 2807 West County Road 75 Monticello, MN 55362

November 30, 2023 L-MT-23-052 10 CFR 54.17

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Monticello Nuclear Generating Plant Docket No. 50-263 Renewed Facility Operating License No. DPR-22

Subsequent License Renewal Application Supplement 7

References:

1) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Docket No. 50-263, Renewal License Number DPR-22 Application for Subsequent Renewal Operating License" dated January 9, 2023, ML23009A353

2) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Supplement 1" dated April 3, 2023, ML23094A136

3) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Supplement 2" dated June 26, 2023, ML23177A218

4) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Supplement 3" dated July 11, 2023, ML23193B026

5) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Supplement 4 and Responses to Request for Confirmation of Information - Set 1" dated July 18, 2023, ML23199A154

6) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Supplement 5" dated August 28, 2023, ML23240A695 Document Control Desk L-MT-23-052 Page 2

7) Letter from Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy to Document Control Desk, "Monticello Nuclear Generating Plant Subsequent License Renewal Application Response to Request for Additional Information Set 2 and Supplement 6" dated September 05, 2023, ML23248A474

8) Memorandum from Office of Nuclear Reactor Regulation to Office of Nuclear Reactor Regulation, "U.S. Nuclear Regulatory Commission Summary Of The October 10, 2023, Public Meeting To Discuss Monticello's Condensate Backwash Receiving Tank Fatigue Evaluation" dated November 09, 2023, ML23313A159

Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy hereafter "NSPM", is submitting a supplement to the Subsequent License Renewal Application, listed in Reference 1.

Clarifying information regarding Tables 4.2.3-1 and 4.2.3-2 and an updated reference was provided in Supplement 1, listed in Reference 2. Clarifications to sections of the SLRA discussed in the breakout audits occurring April through June of 2023 were provided in Supplements 2 through 6, listed in References 3 through 8, respectively. Note that Supplement 3 (Reference 4) did not make any changes to the SLRA. Additional clarifications discussed in the breakout audits occurring October through November and the October public meeting of 2023 are being provided in Supplement 7. The supplement is provided in the Enclosures.

In the enclosures, changes are described along with the affected section(s) and page number(s) of the docketed SLRA (Reference 1) where the changes are to apply. For clarity, revisions to the SLRA are provided with deleted text by strikethrough and inserted text by bold red underline. Changes incorporated from previous RAls and supplements are provided by bold, black font and noted in enclosure.

Document Control L-MT

Summary of Commitments

This letter makes no new commitments and no revisions to existing commitments.

I declare under penalty of perjury that the foregoing is true and correct.

Shawn~

Site Vice Pr sident, Monticello Nuclear Generating Plant Northern States Power Company - Minnesota

cc: Administrator, Region 111, USNRC Project Manager, Monticello, USNRC Resident Inspector, Monticello, USNRC Minnesota Department of Commerce Document Control Desk L-MT-23-052 Page 4

Enclosures Index Enclosure No. Subject

01 Supplement to Condensate Backwash Receiving Tank Fatigue Evaluation

02 Core Spray - Summary of Aging Management Evaluation Table 1 ItemsUpdated

03 Loss of Fracture Toughness (Cracking) of RV Supports Enclosure 01

Supplement to Condensate Backwash Receiving Tank Fatigue Evaluation

Enclosure 02

Core Spray - Summary of Aging Management Evaluation Table 1 Items Updated

Enclosure 03

Loss of Fracture Toughness (Cracking) of RV Supports