ML24115A262

Acceptance Review Determination for Proposed Alternative Request IR-4-14 Regarding Pressurizer and Steam Generator Pressure-Retaining Welds and Full-Penetration Welded Nozzles

ML24115A262
Person / Time
Site:	Millstone
Issue date:	04/24/2024
From:	Richard Guzman NRC/NRR/DORL/LPL1
To:	Sinha S Dominion Energy Nuclear Connecticut
References
EPID L-2024-LLR-0023
Download: ML24115A262 (1)

Text

From: Richard Guzman To: "Shayan Sinha" Cc: RidsNRRLIC109 Resource; Hipo Gonzalez

Subject:

Millstone Power Station, Unit 3 - Acceptance Review Determination Re: Proposed Alternative Request IR-4-14 Regarding Pressurizer and Steam Generator Pressure-Retaining Welds and Full-Penetration Welded Nozzles (EPID: L-2024-LLR-0023)

Date: Wednesday, April 24, 2024 3:46:01 PM

Mr. Sinha,

By letter dated March 22, 2024 (ADAMS Accession No. ML24086A480), Dominion Energy Nuclear Connecticut, Inc. (the licensee) submitted alterative request IR-4-14, requesting to defer examinations for several pressurizer and steam generator pressure-retaining welds and full penetration welded nozzles for two 10-year inservice inspection (ISI) intervals from the last examination period performed for each item as an alternative to the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, examination requirements in Table IWB-2500-1 and Table IWC-2500-1, for Millstone Power Station, Unit 3 (MPS3). The licensee proposes to reexamine the subject welds prior to the end of the current 60-year operating license for MPS3, which expires on November 25, 2045. The proposed alternative is requested on the basis that it provides an acceptable level of quality and safety in lieu of the current ASME Code,Section XI 10-year inspection frequency, pursuant to Title 10 of the Code of Federal Regulations (10 CFR) section 50.55a(z)(1).

The purpose of this e-mail is to provide the results of the Nuclear Regulatory Commission (NRC) staffs acceptance review of this alternative request.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 submittal 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 the licensees submittal and concludes 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 amendment 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 the submittal, the NRC staff has estimated that the review of the alternative request 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 March 30, 2025. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date (greater than a month) or significant changes in the forecasted hours (greater than 25%), 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.

Please contact me if you have any questions. A copy of this email will be made publicly available in ADAMS.

Thanks,

~~~~~~~~~~~~

Rich Guzman Sr. PM, Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Office: O-10H17 l Phone: (301) 415-1030 Richard.Guzman@nrc.gov