MNS-18-040, Submittal of Information Related to Pressurizer Surge and Spray Nozzle Thermal Sleeves Attachment Welds for License Renewal

Submittal of Information Related to Pressurizer Surge and Spray Nozzle Thermal Sleeves Attachment Welds for License Renewal

ML18184A345
Person / Time
Site:	Mcguire, McGuire
Issue date:	06/26/2018
From:	Teresa Ray Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
MNS-18-040
Download: ML18184A345 (2)

Text

Thomas D. Ray, P.E.

ef,DUKE Site Vice President

~;ENERGY McGuire Nuclear Station Duke Energy MGOl VP I 12700 Hagers Ferry Road Huntersville, NC 28078 O: 980.875.4805 f: 980.875.4809 Tom.Ray@duke-energy.com Serial No: MNS-18-040 June 26, 2018 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555-0001

Subject:

Duke Energy Carolinas, LLC (Duke Energy)

McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 50-370 Submittal qf Information Related to Pressurizer Surge and Spray Nozzle Thermal Sleeves Attachment Welds for License Renewal McGuire's Updated Final Safety Analysis Report (UFSAR) Section 18.2.1.1 contains the original commitment to submit to the Nuclear Regulatory Commission (NRC) the results of the susceptibility ranking for the pressurizer surge and spray nozzle thermal sleeves attachment welds following issuance of renewed operating licenses for McGuire and prior to June 12, 2021 (the end of the initial license of McGuire Unit 1).

As currently described in the UFSAR, the original Alloy 600 Aging Management Review (AMR) was completed with the issuance of the renewed operating licenses. The purpose of the Alloy 600 AMR was to ensure that nickel-based alloy locations would be adequately inspected. Since that time, the program description has been revised to reflect the requirements imposed and commitments made subsequent to the issuance of the renewed operating licenses. The intent of the original Alloy 600 AMR is now met by the more comprehensive Alloy 600 Aging Management Program (AMP). Following is the results of the susceptibility ranking for the pressurizer surge and spray nozzle thermal sleeves attachment welds:

The pressurizer surge nozzle thermal sleeves attachment welds were ranked the same as the pressurizer surge nozzle to safe end welds.

The pressurizer spray nozzle thermal sleeves attachment welds were not fabricated from Alloy 82/182 material and were thus removed from the susceptibility ranking.

www.duke-energy.com J

U. S. Nuclear Regulatory Commission June 26, 2018 Page 2 There are no new regulatory commitments contained in this letter. If you have any questions, please contact P. T. Vu of McGuire Regulatory Affairs at (980) 875-4302 or phong.vu@duke-energy.com.

Thomas D. Ray, P. E.

Site Vice President McGuire Nuclear Station xc:

Catherine Haney, Region II Administrator U. S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257 Michael Mahoney, Project Manager U. S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 0-8G9A Rockville, MD 20852-2738 Andy Hutto NRC Senior Resident Inspector McGuire Nuclear Station

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