ML24156A008

NRR E-mail Capture - Constellation Energy, LLC - Fleet Request - Acceptance of Proposed Alternative Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds (L-2024-LLR-0031

ML24156A008
Person / Time
Site:	Limerick, LaSalle, Nine Mile Point
Issue date:	05/31/2024
From:	Scott Wall NRC/NRR/DORL/LPL3
To:	Para W Constellation Energy Generation
Wall S
References
L-2024-LLR-0031
Download: ML24156A008 (3)

Text

From: Scott Wall Sent: Friday, May 31, 2024 8:37 AM To: Williams, Christian D:(Constellation Nuclear)

Cc: Gudger, David T:(Constellation); Gantt, Danii M:(Constellation Nuclear)

Subject:

Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds (L-2024-LLR-0031)

Dear Christian Williams:

By letter dated May 2, 2024 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML24123A119), Constellation Energy Generation, LLC (CEG, the licensee) requested to a proposed alternative to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section Xl (BVP Code), at the following units:

• LaSalle County Station, Units 1 and 2

• Limerick Generating Station, Units 1 and 2

• Nine Mile Point Nuclear Station, Unit 2

Specifically, the proposed alternative requests to utilize the methodology and technical basis of BWRVIP-329-A, Updated Probabilistic Fracture Mechanics Analyses for BWR [Boiling Water Reactor] RPV [Reactor Pressure Vessel] Welds to Address Extended Operations.

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 210 hours0.00243 days <br />0.0583 hours <br />3.472222e-4 weeks <br />7.9905e-5 months <br /> to complete. The NRC staff expects to complete this review by May 2025. 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: 2510

Mail Envelope Properties (SA1PR09MB96055BC5BB777368D3DA50E092FC2)

Subject:

Constellation Energy Generation, LLC - Fleet Request - Acceptance of Proposed Alternative Concerning Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds (L-2024-LLR-0031)

Sent Date: 5/31/2024 8:37:09 AM Received Date: 5/31/2024 8:37:13 AM From: Scott Wall

Created By: Scott.Wall@nrc.gov

Recipients:

"Gudger, David T:(Constellation)" <david.gudger@constellation.com>

Tracking Status: None "Gantt, Danii M:(Constellation Nuclear)" <Danii.Gantt@constellation.com>

Tracking Status: None "Williams, Christian D:(Constellation Nuclear)" <Christian.Williams@constellation.com>

Tracking Status: None

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

Files Size Date & Time MESSAGE 3796 5/31/2024 8:37:13 AM

Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: