ML23321A201

NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative for Examination of Pressurizer Circumferential and Longitudinal Shell-to-Head Welds and Nozzle-to-Vessel Welds (L-2023-LLR-0062)

ML23321A201
Person / Time
Site:	Byron, Braidwood
Issue date:	11/17/2023
From:	Scott Wall NRC/NRR/DORL/LPL3
To:	Tom Loomis Constellation Energy Generation
Wall S
References
L-2023-LLR-0062
Download: ML23321A201 (3)

Text

From: Scott Wall Sent: Friday, November 17, 2023 12:52 PM To: Loomis, Thomas R:(Constellation)

Cc: Mokkapati, Sailaja:(Constellation Nuclear); Lueshen, Kevin:(Constellation Nuclear); Steinman, Rebecca L:(Exelon Nuclear)

Subject:

Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative for Examination of Pressurizer Circumferential and Longitudinal Shell-to-Head Welds and Nozzle-to-Vessel Welds (L-2023-LLR-0062)

Dear Mr. Loomis:

By letter dated November 1, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23305A069), Constellation Energy Generation, LLC (CEG, the licensee) requested to a proposed alternative to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code,Section XI, at the following units:

• Braidwood Station, Units 1 and 2 (Braidwood)

• Byron Station, Units 1 and 2 (Byron)

Specifically, the proposed alternatives are related to the volumetric examination of pressurizer circumferential and longitudinal shell-to-head welds and nozzle-to-shell welds. The proposed alternative requests to extend the inspection interval frequency from 10 years to the remainder of the currently licensed operating periods.

The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs acceptance review of these alternative requests. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant. Pursuant to Sections 50.55a(z)(1) and 50.55a(z)(2) of Title 10 of the Code of Federal Regulations (10 CFR),

the applicant shall demonstrate that the proposed alternatives would provide an acceptable level of quality and safety, or that compliance with the specified requirements of Section 50.55a would result in hardship or unusual difficulty without a compensating increase in the level of quality or safety.

The NRC staff has reviewed your application and concluded that it does provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed exemption 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 despite completion of an adequate acceptance review. If additional information is needed, you will be advised by separate correspondence.

Based on the information provided in your submittal, the NRC staff has estimated that this review will take approximately 180 hours0.00208 days <br />0.05 hours <br />2.97619e-4 weeks <br />6.849e-5 months <br /> to complete. The NRC staff expects to complete this review by October 2024. 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 could 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) 415-2855 or e-mail at Scott.Wall@nrc.gov.

Scott P. Wall, LSS BB, BSP Senior Project Manager Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301.415.2855 Scott.Wall@nrc.gov

Hearing Identifier: NRR_DRMA Email Number: 2315

Mail Envelope Properties (SA1PR09MB9605EDA320E8C428ACA7436692B7A)

Subject:

Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative for Examination of Pressurizer Circumferential and Longitudinal Shell-to-Head Welds and Nozzle-to-Vessel Welds (L-2023-LLR-0062)

Sent Date: 11/17/2023 12:51:57 PM Received Date: 11/17/2023 12:52:03 PM From: Scott Wall

Created By: Scott.Wall@nrc.gov

Recipients:

"Mokkapati, Sailaja:(Constellation Nuclear)" <Sailaja.Mokkapati@constellation.com>

Tracking Status: None "Lueshen, Kevin:(Constellation Nuclear)" <Kevin.Lueshen@constellation.com>

Tracking Status: None "Steinman, Rebecca L:(Exelon Nuclear)" <Rebecca.Steinman@exeloncorp.com>

Tracking Status: None "Loomis, Thomas R:(Constellation)" <thomas.loomis@constellation.com>

Tracking Status: None

Post Office: SA1PR09MB9605.namprd09.prod.outlook.com

Files Size Date & Time MESSAGE 3817 11/17/2023 12:52:03 PM

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