ML20224A070

Acceptance Review Determination (E-mail Dated 8/11/2020) Alternative Request RR-05-06 Insepection Interval Extension for SG Pressure-Retaining Welds and Full-Penetration Welded Nozzles

ML20224A070
Person / Time
Site:	Millstone
Issue date:	08/11/2020
From:	Richard Guzman NRC/NRR/DORL/LPL1
To:	Sinha S Dominion Energy Nuclear Connecticut
Guzman R
References
EPID L-2020-LLA-0039
Download: ML20224A070 (2)

Text

From: Guzman, Richard To: Shayan.Sinha@dominionenergy.com Cc: RidsNRRLIC109 Resource

Subject:

Millstone Power Station Unit No. 2 - Acceptance Review Determination: Alternative Request RR-05-06 Inspection Interval Extension for SG Pressure-Retaining Welds and Full-Penetration Welded Nozzles (EPID: L-2020-LLR-0097]

Date: Tuesday, August 11, 2020 8:35:38 AM

Shayan, By letter dated July 15, 2020 (ADAMS Accession No. ML20198M682), Dominion Energy Nuclear Connecticut, Inc. (DENC) submitted Alternative Request RR-05-06 pursuant to 10 CFR 50.55a(z)(1) requesting to extend the inspection interval for certain steam generator pressure-retaining welds and full-penetration welded nozzles from 10 years to 30 years for Millstone Power Station, Unit No. 2. Specifically, the proposed alternative is applicable to the ASME Section XI, Table IWB-2500-1, Examination Category B-B and B-D and Table IWC-2500-1, Examination Category C-A and C-B, component exams and is requested for the remainder of the current fifth 10-year inservice inspection interval and through the following sixth 10-year inservice inspection interval, currently scheduled to end on March 31, 2040.

The purpose of this e-mail is to provide the results of the Nuclear Regulatory Commission (NRC) staffs acceptance review of this relief 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 DENCs 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 request 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. You will be advised of any further information needed to support the NRC staffs detailed technical review by separate correspondence.

Based on the information provided in your submittal, the NRC staff has estimated that the review of the relief request will take approximately 300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> to complete. The NRC staff expects to complete this review by August 2021. 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.

Rich Guzman Sr. PM, Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Office: O-9C7 l Phone: (301) 415-1030 Richard.Guzman@nrc.gov