ML22041A531

NRR E-mail Capture - Catawba Nuclear Station Unit 2 - Acceptance of Requested Licensing Action Use of Alternative Requirements of ASME Code for Embedded Flaw Repair Method on Reactor Vessel Closure Head Penetration 74 EPID L-2022-LLR-0010

ML22041A531
Person / Time
Site:	Catawba
Issue date:	02/10/2022
From:	Stone Z Plant Licensing Branch II
To:	Grzeck L Duke Energy Carolinas
References
L-2022-LLR-0010
Download: ML22041A531 (3)

Text

From: Stone, Zackary Sent: Thursday, February 10, 2022 9:51 AM To: Grzeck, Lee Cc: Edwards, Nicole D

Subject:

Catawba Nuclear Station Unit 2 - Acceptance of Requested Licensing Action RE: Use of Alternative Requirements of ASME Code for Embedded Flaw Repair Method on Reactor Vessel Closure Head Penetration #74 (EPID L-2022-LLR-0010)

Mr. Grzeck, By letter dated January 20, 2022 (Agencywide Documents Access and Management System Accession No. ML22020A283), Duke Energy Carolinas, LLC, (the licensee) submitted an alternative request for Catawba Nuclear Station Unit 2. The licensee is requesting to utilize an alternative to the requirements of American Society of Mechanical Engineers (ASME) Code Section XI, IWA-4000 and ASME Code Section III, NB-4450 for an embedded flaw repair method implemented on Catawba Nuclear Station Unit 2 Reactor Vessel Closure Head Penetration #74 during the Spring, 2021 outage. The licensee submitted the request pursuant to 10 CFR Section 50.55a(z)(1), which requires the applicant to demonstrate that the proposed alternative would provide an acceptable level of quality and safety.

The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs acceptance review of this proposed alternative. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to begin its detailed technical review. The acceptance review is also intended to identify whether the request has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

The NRC staff has reviewed your application and concluded that it does provide technical information in sufficient detail to enable the NRC staff to begin its detailed technical review and make an independent assessment regarding the acceptability of the proposed request in terms of regulatory requirements and the protection of public health and safety and the environment.

Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staffs ability to complete the detailed technical review are identified in despite completion of an adequate acceptance review. You will be advised of any further information needed to support the NRC staffs detailed technical review by separate correspondence.

Based on the information provided in your submittal, the NRC staff has estimated that this proposed request will take approximately 120 hours0.00139 days <br />0.0333 hours <br />1.984127e-4 weeks <br />4.566e-5 months <br /> to complete. The NRC staff expects to compete this review by your requested date September 10, 2022. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date or significant changes in the forecasted hours, the reasons for the changes along with the new estimates, will be communicated during the routine interactions with the assigned project manager.

These estimates are based on the NRC staffs initial review of the application and they can change due to several factors including requests for additional information, and unanticipated addition of scope to the review. Additional delay may occur if the submittal is provided to the NRC in advance or in parallel with industry program initiatives or pilot applications.

If you have any questions, please contact me at (301) 415-0615 or Zackary.Stone@nrc.gov.

Zackary Stone, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-414 cc: Listserv

Hearing Identifier: NRR_DRMA Email Number: 1517 Mail Envelope Properties (SA1PR09MB8687531C4E4EB32F7E887AEDE12F9)

Subject:

Catawba Nuclear Station Unit 2 - Acceptance of Requested Licensing Action RE:

Use of Alternative Requirements of ASME Code for Embedded Flaw Repair Method on Reactor Vessel Closure Head Penetration #74 (EPID L-2022-LLR-0010)

Sent Date: 2/10/2022 9:51:07 AM Received Date: 2/10/2022 9:51:00 AM From: Stone, Zackary Created By: Zackary.Stone@nrc.gov Recipients:

"Edwards, Nicole D" <Nicole.Edwards@duke-energy.com>

Tracking Status: None "Grzeck, Lee" <Lee.Grzeck@duke-energy.com>

Tracking Status: None Post Office: SA1PR09MB8687.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3477 2/10/2022 9:51:00 AM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: