ML21252A048

NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles

ML21252A048
Person / Time
Site:	Dresden, Peach Bottom, Nine Mile Point, Limerick, Clinton, Quad Cities, FitzPatrick, LaSalle
Issue date:	09/07/2021
From:	Blake Purnell NRC/NRR/DORL/LPL3
To:	Tom Loomis Exelon Generation Co
References
L-2021-LLR-0057, L-2021-LLR-0058
Download: ML21252A048 (3)

Text

From: Purnell, Blake Sent: Tuesday, September 7, 2021 9:09 AM To: Loomis, Thomas R:(GenCo-Nuc) (thomas.loomis@exeloncorp.com)

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

Subject:

Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles

Mr. Loomis:

By application dated August 12 2021 (ADAMS Accession No. ML21224A123), Exelon Generation Company, LLC (the licensee) submitted a request in accordance with paragraph 50.55a(z)(2) of Title 10 of the Code of Federal Regulations (10 CFR) for a proposed alternative to certain requirements of 10 CFR 50.55a, Codes and standards, at Clinton Power Station, Unit No. 1; Dresden Nuclear Power Station, Units 2 and 3; James A. FitzPatrick Nuclear Power Plant; LaSalle County Station, Units 1 and 2; Limerick Generation Station, Units 1 and 2; Nine Mile Point Nuclear Station, Units 1 and 2; Peach Bottom Atomic Power Station, Units 2 and 3; and Quad Cities Nuclear Power Station, Units 1 and 2. Specifically, the application requests U.S. Nuclear Regulatory Commission (NRC) approval to use a half nozzle repair technique for water level instrumentation partial penetration nozzles on the reactor pressure vessel as an alternative to the repair requirements in Section XI of the American Society for Mechanical Engineers Boiler and Pressure Vessel Code.

The purpose of this email is to provide the results of the 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 350 hours0.00405 days <br />0.0972 hours <br />5.787037e-4 weeks <br />1.33175e-4 months <br /> to complete. The staff expects to complete its review by September 7, 2022. 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. 50-461, 50-237, 50-249, 50-333, 50-373, 50-374, 50-352, 50-353, 50-220, 50-410, 50-277, 50-278, 50-254, and 50-265

EPIDs: L-2021-LLR-0057 and -0058

Hearing Identifier: NRR_DRMA Email Number: 1333

Mail Envelope Properties (BLAPR09MB64974B03C561B760E95F4FEBE6D39)

Subject:

Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles Sent Date: 9/7/2021 9:08:41 AM Received Date: 9/7/2021 9:08:00 AM 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: BLAPR09MB6497.namprd09.prod.outlook.com

Files Size Date & Time MESSAGE 3408 9/7/2021 9:08:00 AM

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