ML20149K430

NRR E-mail Capture - Exelon Generation Company, LLC - Request for an Alternative to Use ASME Code Case N-885

ML20149K430
Person / Time
Site:	Calvert Cliffs, Byron, Braidwood, Ginna
Issue date:	05/22/2020
From:	Blake Purnell NRC/NRR/DORL/LPL3
To:	Tom Loomis Exelon Corp
References
L-2020-LLR-0069
Download: ML20149K430 (3)

Text

From: Purnell, Blake Sent: Friday, May 22, 2020 2:00 PM To: Loomis, Thomas R:(GenCo-Nuc) (thomas.loomis@exeloncorp.com)

Cc: Gudger, David T:(GenCo-Nuc); Salgado, Nancy

Subject:

Exelon Generation Company, LLC - Request for an Alternative to Use ASME Code Case N-885 (EPID L-2020-LLR-0069)

Mr. Loomis:

By application dated April 28, 2020 (ADAMS Accession No. ML20119B061), Exelon Generation Company, LLC (the licensee) submitted a request in accordance with Paragraph 50.55a(z)(1) of Title 10 of the Code of Federal Regulations (10 CFR) for a proposed alternative to the requirements of 10 CFR 50.55a and the American Society of Mechanical Engineers (ASME)

Code at Braidwood Station, Units 1 and 2; Byron Station, Unit Nos. 1 and 2; Calvert Cliffs Nuclear Power Plant, Units 1 and 2; and R. E. Ginna Nuclear Power Plant The proposed alternative would allow the licensee to use ASME Code Case N-885, Alternative Requirements for Table IWB-2500-1, Examination Category B-N-1, Interior of Reactor Vessel, Category B-N-2, Welded Core Support Structures and Interior Attachments to Reactor Vessels, Category B-N-3, Removable Core Support StructuresSection XI, Division 1, at these facilities.

The purpose of this email 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 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.

The NRC staff has reviewed your application and concluded that it provides technical information in sufficient detail to enable the staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed alternative 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 staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. You will be advised of any further information needed to support the staffs detailed technical review by separate correspondence.

Based on the information provided in your submittal, the NRC staff estimates that review of this request will take approximately 150 hours0.00174 days <br />0.0417 hours <br />2.480159e-4 weeks <br />5.7075e-5 months <br /> to complete. The staff expects to complete its review by May 31, 2021. These estimates are based on the staffs initial review of the application and they could change due to several factors, including requests for additional information. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date or significant changes to the forecasted hours, I will inform you of the reason for the change and provide the new estimates.

Sincerely, Blake Purnell, Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission ph: 301-415-1380 Docket Nos. STN 50-456, STN 50-457, STN 50-454, STN 50-455, 50-317, 50-318, and 50-244

Hearing Identifier: NRR_DRMA Email Number: 602 Mail Envelope Properties (CH2PR09MB4361416F043344293964AB4AE6B40)

Subject:

Exelon Generation Company, LLC - Request for an Alternative to Use ASME Code Case N-885 (EPID L-2020-LLR-0069)

Sent Date: 5/22/2020 1:59:47 PM Received Date: 5/22/2020 1:59:00 PM From: Purnell, Blake Created By: Blake.Purnell@nrc.gov Recipients:

"Gudger, David T:(GenCo-Nuc)" <David.Gudger@exeloncorp.com>

Tracking Status: None "Salgado, Nancy" <Nancy.Salgado@nrc.gov>

Tracking Status: None "Loomis, Thomas R:(GenCo-Nuc) (thomas.loomis@exeloncorp.com)" <thomas.loomis@exeloncorp.com>

Tracking Status: None Post Office: CH2PR09MB4361.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3205 5/22/2020 1:59:00 PM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: