ML20302A080

Request to Use a Provision of a Later Edition of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI

ML20302A080
Person / Time
Site:	Wolf Creek
Issue date:	10/30/2020
From:	Jennifer Dixon-Herrity Plant Licensing Branch IV
To:	Reasoner C Wolf Creek
Lee S, 301-415-3168
References
EPID L-2020-LLR-0134
Download: ML20302A080 (6)

Text

October 30, 2020 Mr. Cleveland Reasoner Chief Executive Officer and Chief Nuclear Officer Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839

SUBJECT:

WOLF CREEK GENERATING STATION, UNIT 1 - REQUEST TO USE A PROVISION OF A LATER EDITION OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE, SECTION XI (EPID L-2020-LLR-0134)

Dear Mr. Reasoner:

The U.S. Nuclear Regulatory Commission (NRC) has approved your request to use a provision of a later edition of American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code,Section XI, for Wolf Creek Generating Station, Unit 1 (Wolf Creek). This action is in response to your request dated October 1, 2020 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML20280A232).

Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR)

Section 50.55a(g)(4)(iv), the Wolf Creek Nuclear Operating Corporation (the licensee) proposed to use subparagraph IWA-4540(b) of the 2017 Edition of the ASME BPV Code,Section XI, in place of the corresponding subparagraph from the Code of Record.

The NRC staff approves the use of subparagraph IWA-4540(b) of the 2017 Edition of ASME BPV Code,Section XI, for Wolf Creek, for the duration of the fourth inservice inspection interval that started on September 3, 2015 and ends on September 2, 2025.

All other ASME BPV Code,Section XI, requirements which are not modified by the NRC staffs approval of the licensees request remain applicable, including third-party review by the Authorized Nuclear Inservice Inspector.

Enclosed is the NRC staffs safety evaluation.

C. Reasoner If you have any questions, please contact the Project Manager, Samson Lee at 301-415-3168 or by e-mail at Samson.Lee@nrc.gov.

Sincerely,

/RA/

Jennifer L. Dixon-Herrity, Chief Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482 cc: Listserv

SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUEST TO USE A PROVISION OF A LATER EDITION OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION, UNIT 1 DOCKET NO. 50-482

1.0 INTRODUCTION

By letter dated October 1, 2020 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML20280A232), Wolf Creek Nuclear Operating Corporation (the licensee) submitted a request to use a portion of a later edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code for Wolf Creek Generating Station, Unit 1 (Wolf Creek).

Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR)

Section 50.55a(g)(4)(iv), Applicable ISI [inservice inspection] Code: Use of subsequent Code editions and addenda, the licensee proposed to use subparagraph IWA-4540(b) of the 2017 Edition of the ASME BPV Code,Section XI, instead of the corresponding subparagraph from the current Code of Record. The time period applicable for the use of the requested subsequent ASME BPV Code edition and addenda for Wolf Creek is the fourth ISI interval. The licensee asserts that it meets all related requirements of the 2017 Edition of the ASME BPV Code,Section XI.

2.0 PROPOSED USE OF SUBSEQUENT CODE EDITION AND ADDENDA 2.1 Component(s) for Which the Subsequent Code Edition is Requested All Class 1, 2, and 3 items located in the ASME BPV Code,Section XI, boundaries.

2.2 Current Code Requirement Subparagraph IWA-4540(b) provides items that are exempt from pressure testing after repair/replacement activities.

Enclosure

2.3 Current Code Edition and Addenda of Record The ISI Code of Record for the current 10-year ISI interval at Wolf Creek is the ASME BPV Code,Section XI, 2007 Edition, through 2008 Addenda.

2.4 Proposed Subsequent Code Edition and Addenda The proposed subsequent Code edition and addenda to be used is subparagraph IWA-4540(b) of the 2017 Edition of the ASME BPV Code,Section XI.

2.5 Duration of the Use of the Later Code Edition and Addenda The duration of this request is for the fourth interval that started on September 3, 2015 and ends on September 2, 2025.

3.0 REGULATORY EVALUATION

The licensee is proposing to use a section of a later edition and addenda of the ASME BPV Code,Section XI, in accordance with 10 CFR 50.55a(g)(4)(iv), which states:

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 this section, subject to the conditions listed in paragraph (b) of this section, 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.

Given that 10 CFR 50.55(g)(4)(iv) permits the U.S. Nuclear Regulatory Commission (NRC) staff to approve the use of subsequent ASME BPV Code edition and addenda, the NRC staff finds that, subject to the following technical evaluation, the licensee may propose to use a section of a later edition and addenda of the ASME BPV Code,Section XI, and the NRC staff has the regulatory authority to approve the later edition and addenda of the ASME BPV Code,Section XI.

4.0 NRC TECHNICAL EVALUATION As previously stated in Section 3.0 of this safety evaluation, prior to approving the use of a subsequent edition and addenda of the ASME BPV Code under 10 CFR 50.55a(g)(4)(iv), the NRC staff must find that (1) the proposed subsequent edition and addenda are incorporated by reference in 10 CFR 50.55a(a), Documents approved for incorporation by reference; (2) the licensee has identified any conditions listed in 10 CFR 50.55a(b), Use and conditions on the use of standards, appropriate to the request and will comply with those conditions; (3) the licensee has requested approval to use the subsequent edition and addenda; and (4) if only portions of edition or addenda are to be used, all related requirements of the respective edition or addenda are met. If these criteria are met, the NRC staff finds the use of the subsequent edition and addenda of the ASME BPV Code,Section XI, to be acceptable.

4.1 Incorporation by Reference In evaluating the first criterion, 10 CFR 50.55a(a) incorporates by reference the ASME BPV Code,Section XI, from the 1970 Edition through the 1976 Winter Addenda, and the

1977 Edition through the 2017 Edition. The licensee proposed to use the 2017 Edition, which is included in the list of editions and addenda incorporated by reference in the current edition of 10 CFR 50.55a(a). Therefore, the NRC finds that the first criterion has been satisfied.

4.2 Subject to Conditions Listed in 10 CFR 50.55a(b)

In evaluating the second criterion, the NRC staff finds that 10 CFR 50.55a(b) contains no conditions relevant to this request. Therefore, the NRC staff finds that the second criterion has been satisfied.

4.3 Requesting Commission Approval In evaluating the third criterion, the licensee's request dated October 1, 2020, constitutes a request to the Commission for approval to use a subsequent edition/addendum of the ASME BPV Code. Therefore, the NRC staff finds that the third criterion has been satisfied.

4.4 All Related Requirements In evaluating the fourth criterion, the NRC staff finds that there are no related requirements relevant to this request. Therefore, the NRC staff finds that the fourth criterion has been satisfied.

4.5 Summary Based on the review above, the NRC staff finds that the licensee has adequately addressed all regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv).

5.0 CONCLUSION

As set forth above, NRC staff finds that the licensee has adequately addressed all of the regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv). Therefore, the NRC staff concludes that the use of subparagraph IWA-4540(b) of the 2017 Edition of the ASME BPV Code,Section XI, is acceptable. The NRC staff approves the use of subparagraph IWA-4540(b) of the 2017 Edition of the ASME BPV Code,Section XI, at Wolf Creek, for the fourth ISI interval.

All other ASME BPV Code,Section XI, requirements which are not modified by the NRC staffs approval of the licensees request remain applicable, including third-party review by the Authorized Nuclear Inservice Inspector.

Principal Contributor: S. Lee, NRR Date: October 30, 2020

ML20302A080

• via e-mail OFFICE NRR/DORL/LPL4/PM* NRR/DORL/LPL4/LA* NRR/DNRL/NPHP/BC*

NAME SLee PBlechman MMitchell DATE 10/27/2020 10/29/2020 10/27/2020 OFFICE NRR/DORL/LPL4/BC*

NAME JDixon-Herrity DATE 10/30/2020