L-MT-23-035, Subsequent License Renewal Application Supplement 5

Subsequent License Renewal Application Supplement 5

ML23240A695
Person / Time
Site:	Monticello
Issue date:	08/28/2023
From:	Hafen S Northern States Power Company, Minnesota, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-MT-23-035
Download: ML23240A695 (1)

Text

2807 West County Road 75 (l Xcel Energy

• Monticello, MN 55362

August 28, 2023 L-MT-23-035 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 5

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 Con"rmation of Information - Set 1 dated July 18, 2023, ML23199A154 Document Control Desk L-MT-23-035 Page 2

Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy

11 NSPM",

hereafter 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, 3, and 4, listed in References 3, 4, and 5, respectively. Additional clarifications discussed in the breakout audits occurring April through June of 2023 are being provided in the Enclosures of Attachment 1 of this Supplement.

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. Previous changes incorporated as a result of other Supplements are provided by bold, black font and noted in the description of the Enclosure.

Summary of Commitments

This letter makes new commitments and revisions to existing commitments as explained in the enclosures. Commitments 33 and 36 include additions and revisions.

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

Executed on August z.g, 2023.

Site Vi President, Monticello Nuclear Generating Plant Northern States Power Company - Minnesota

cc: Administrator, Region Ill, USNRC Project Manager, Monticello, USNRC Resident Inspector, Monticello, USNRC Minnesota Department of Commerce Document Control Desk L-MT-23-035 Page 3 Enclosures Index Enclosure No. Subject

01 Irradiation Eects on Biological Shield Structural Steel Components

02 Loss of Fracture Toughness of RV Supports

03a Reduction of Strength and Mechanical Properties of Structural Steel andConcrete Due to Irradiation

03b RAMA Fluence Methodology for Biological Shield Irradiation Evaluation

03c Gamma Dose Biological Shield Irradiation Evaluation Clari"cation

03d Reactor Vessel Support Steel Irradiation Evaluation Clari"cations

03e Biological Shield Structural Steel Evaluation Clari"cations

04 Concrete Aging Management Review - Containment Temperature ControlClari"cation

05 Correction of the Intended Functions Associated with the CRD System

06 Supplement for AMR Items that Do Not Cite Applicable SRP-SLR and GALL-SLR Item Numbers within Their IPA Group

07 Supplement 2 Editorial Corrections

08 Supplement 4 Editorial Correction

09 Supplement 4 Enclosure 06b Administrative Correction

10 Table 3.5.2-1 Line Item and Note 7 Correction Enclosure 01

Irradiation Eects on Biological Shield Structural Steel Components

Enclosure 02

Loss of Fracture Toughness of RV Supports

Enclosure 03a

Reduction of Strength and Mechanical Properties of Structural Steel and Concrete Due to Irradiation

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Enclosure 03b

RAMA Fluence Methodology for Biological Shield Irradiation Evaluation

Enclosure 03c

Gamma Dose Biological Shield Irradiation Evaluation Clari"cation

Enclosure 03d

Reactor Vessel Support Steel Irradiation Evaluation Clari"cations

Enclosure 03e

Biological Shield Structural Steel Evaluation Clari"cations

Enclosure 04

Concrete Aging Management Review - Containment Temperature Control Clari"cation

Enclosure 05

Correction of the Intended Functions Associated with the CRD System

Enclosure 06

Supplement for AMR Items that Do Not Cite Applicable SRP-SLR and GALL-SLR Item Numbers within Their IPA Group

Enclosure 07

Supplement 2 Editorial Corrections

Enclosure 08

Supplement 4 Editorial Correction

Enclosure 09

Supplement 4 Enclosure 06b Administrative Correction

Enclosure 10

Table 3.5.2-1 Line Item and Note 7 Correction