ML23079A074

Request RR-003 to Use Later Edition of ASME Section XI Code for ISI Code of Record

ML23079A074
Person / Time
Site:	Monticello
Issue date:	04/11/2023
From:	V Sreenivas Plant Licensing Branch III
To:	Domingos C Northern States Power Company, Minnesota
Ballard, B
References
EPID L-2023-LLR-0005
Download: ML23079A074 (1)

Text

April 11, 2023 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 - REQUEST RR-003 TO USE LATER EDITION OF ASME SECTION XI CODE FOR ISI CODE OF RECORD (EPID L-2023-LLR-0005)

Dear Mr. Domingos:

By letter dated February 7, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No, ML23039A044), Northern States Power Company (NSPM or the licensee), a Minnesota corporation, doing business as Xcel Energy, submitted a request to the U.S. Nuclear Regulatory Commission (NRC) for the use of a later edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, requirements at Monticello Nuclear Generating Plant.

Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(g)(4)(iv),

Applicable ISI [Inservice Inspection] Code: Use of subsequent Code editions and addenda, NSPM requested to use later code editions and addenda for ISI items subject to the conditions specified in 10 CFR 50.55a(b). The licensee requested to use the 2019 Edition of the ASME Code,Section XI, for the sixth inservice inspection interval for the Monticello Nuclear Generating Plant (MNGP). The current applicable Code of Record is the 2017 Edition. The MNGP sixth interval will start on June 1, 2023.

The NRC staff has reviewed the subject request and concludes, as set forth in the enclosed safety evaluation, that NSPM has adequately addressed all the regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv) and is in compliance with the requirements of the ASME Code,Section XI.

C. Domingos If you have any questions, please contact the Monticello Project Manager, Brent Ballard, at 301-415-0680 or via e-mail at Brent.Ballard@nrc.gov.

Sincerely, Digitally signed by Venkataiah Sreenivas Date: 2023.04.11 15:05:57 -04'00' V. Sreenivas, Branch Chief Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosure:

Safety Evaluation cc: Listserv

SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUEST NO. RR-003 TO USE LATER ASME CODE EDITION AND ADDENDA FOR INSERVICE INSPECTION ACTIVITIES NORTHERN STATES POWER COMPANY MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263

1.0 INTRODUCTION

By letter dated February 7, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23039A044), Northern States Power Company (NSPM or the licensee) submitted a request to use a later edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, Rules for Inservice Inspection [ISI] of Nuclear Power Plant Components. As noted in Regulatory Issue Summary (RIS) 2004-12 (ML042090436), licensees seeking to use later editions and addenda of the ASME Code,Section XI, that have been incorporated by reference, pursuant to 10 CFR 50.55a(f)(4)(iv) or 10 CFR 50.55a(g)(4)(iv), are required to obtain U.S. Nuclear Regulatory Commission (NRC or Commission) approval.

Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(g)(4)(iv),

NSPM requested to use later code editions and addenda for ISI items subject to the conditions specified in 10 CFR 50.55a(b). The licensee requested to use the 2019 Edition of the ASME Code,Section XI, for the sixth ISI interval for the Monticello Nuclear Generating Plant (MNGP).

The current applicable Code of Record is the 2017 Edition. The MNGP sixth interval will start on June 1, 2023.

2.0 REGULATORY EVALUATION

Pursuant to 10 CFR 50.55a(g)(4)(ii), inservice examination of components and system pressure tests conducted during successive 120-month inspection intervals must comply with the requirements of the latest edition and addenda of the ASME Code incorporated by reference in paragraph (a) of section 50.55a 18 months before start of the 120-month inspection interval (or the optional ASME Code cases listed in NRC Regulatory Guide (RG) 1.147, Inservice Inspection Code Case Acceptability, ASME Code,Section XI, Division 1, when using ASME Code,Section XI, as incorporated by reference in paragraph (a)(3)(ii) of section 50.55a), subject to the conditions listed in paragraph (b) of section 50.55a.

The regulation in 10 CFR 50.55a(a)(1)(ii) provides the lists of editions and addenda for ASME Code,Section XI, that are incorporated by reference in paragraph (a) of section 50.55a, subject to the conditions listed in paragraph (b) of section 50.55a. Pursuant to 10 CFR Enclosure

50.55a(a)(1)(ii)(C)(56), the 2019 Edition of the ASME Code,Section XI, has been incorporated by reference in paragraph (a) of section 50.55a with conditions.

Pursuant to 10 CFR 50.55a(g)(4)(iv), inservice examination of components and system pressure tests may meet the requirements set forth in subsequent editions and addenda that are incorporated by reference in paragraph (a) of 10 CFR 50.55a, Documents approved for incorporation by reference, subject to the conditions listed in paragraph (b) of 10 CFR 50.55a, Use and conditions on the use of standards, and subject to Commission approval. Portions of editions or addenda may be used provided that all related requirements of the respective editions or addenda are met.

NRC RIS 2004-12, Clarification on Use of Later Editions and Addenda to the ASME OM Code and Section XI, provides clarification to the requirements of 10 CFR 50.55a(g)(4)(iv).

Based on the above, and subject to the following technical evaluation, the NRC staff finds that regulatory authority exists for the licensee to request and the NRC to approve the use of subsequent editions and addenda of the ASME Code as requested by the licensee.

3.0 TECHNICAL EVALUATION

3.1 The Licensees Proposed Use of Later Code Editions and Addenda The licensee is preparing to update the ASME Code,Section XI, ISI program at MNGP for its next 120-month interval. As stated in 10 CFR 50.55a(g)(4)(ii), Inservice examination of components and system pressure tests conducted during successive 120-month inspection intervals must comply with the requirements of the latest edition and addenda of the ASME Code incorporated by reference in paragraph (a) of this section 18 months before the start of the 120-month inspection interval For MNGP, the applicable Code of Record would be the 2017 edition.

In its February 7, 2023, letter, NSPM requested NRC approval to use the 2019 edition of the ASME Code.Section XI, code for the MNGP sixth interval ISI program Code of Record.

3.2 NRC Staff Evaluation Based on the requirements in 10 CFR 50.55a(g)(4)(iv), the NRC staff considered the following criteria in their review of the licensees application:

1. The proposed edition of the ASME Code is incorporated by reference in 10 CFR 50.55a(a).

2. The proposed edition of the ASME Code is subject to the conditions listed in 10 CFR 50.55a(b).

3. The licensee shall request Commission approval to use the proposed edition of the ASME Code.

4. If only portions of editions are to be used, all related requirements of the respective editions must be met.

In evaluating the first criterion, the NRC staff notes that 10 CFR 50.55a(a) incorporates by reference the ASME Code,Section XI, 2019 Edition, as published in the Federal Register on October 27, 2022 (87 FR 65148), and it became effective November 28, 2022. Therefore, the NRC staff finds that the first criterion has been satisfied.

In evaluating the second criterion, the NRC staff observes that the NSPM letter does not propose any alternatives to the provisions of the ASME Code, 2019 edition, as incorporated by reference. Use of the code would, therefore, be subject to the conditions listed in 10 CFR 50.55a(b). With this understanding, the NRC staff finds that the second criterion has been satisfied.

In evaluating the third criterion, the NRC staff notes that NSPMs February 7, 2023, submittal constitutes a request to the Commission for approval to use a subsequent edition of the ASME Code. Therefore, the NRC staff finds that the third criterion has been satisfied.

In evaluating the fourth criterion, the NRC staff observes that the NSPM letter does not propose to use only portions of the ASME Code, 2019 edition, as incorporated by reference. Therefore, the NRC staff finds that the fourth criterion has been satisfied.

Based on the above, the NRC staff finds that NSPM has satisfied each of the four criteria of 10 CFR 50.55a(g)(4)(iv) in its request to use the ASME Code,Section XI, 2019 Edition, in lieu of the 2017 Edition of the ASME Code,Section XI, for the MNGP sixth interval ISI program Code of Record. The NRC staff finds that the licensees proposal is acceptable.

4.0 CONCLUSION

As set forth above, the NRC staff determines that the use of the ASME Code,Section XI, 2019 Edition, for the MNGP sixth interval ISI program Code of Record is acceptable because NSPM has adequately addressed all the regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv) and is in compliance with the requirements of the ASME Code,Section XI. Therefore, the NRC staff approves the use of the ASME Code,Section XI, 2019 Edition for the sixth interval ISI program Code of Record at MNGP, which is scheduled to start on June 1, 2023.

Principal Contributor(s): CMoyer, NRR ARezai, NRR Date: April 11, 2023

ML23079A074 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DNRL/NVIB NAME BBallard SRohrer ABuford DATE 3/16/23 3/20/23 03/01/2023 OFFICE NRR/DNRL/NPHP NRR/DORL/LPL3/BC NAME MMitchell VSreenivas DATE 3/20/23 4/11/23