ML25094A144
| ML25094A144 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 04/04/2025 |
| From: | John Lamb Plant Licensing Branch II |
| To: | Lowery K Southern Nuclear Operating Co |
| References | |
| L-2025-LLA0035 | |
| Download: ML25094A144 (3) | |
Text
From:
John Lamb Sent:
Friday, April 4, 2025 10:17 AM To:
Lowery, Ken G.
Cc:
Joyce, Ryan M.
Subject:
Acceptance Review - Vogtle 3 and 4 - Add New Tcold - High Function to TS 3.3.8 (L-2025-LLA0035)
- Ken, By letter dated February 14, 2025 (ML25045A166), Southern Nuclear Operating Company (SNC) submitted a license amendment request (LAR) for Vogtle Electric Generating Plant (Vogtle), Units 3 and 4. The proposed amendments would add to TS Table 3.3.8-1, Engineered Safeguards Actuation System Instrumentation, a new Reactor Coolant System (RCS) Cold Leg Temperature (Tcold) - High, Function 11.b, to for passive residual heat removal (PRHR) actuation logic, as well as editorial changes to TS 3.3.8 at Vogtle, Units 3 and 4. The new Function 11.b impacts the Protection and Safety Monitoring System (PMS) actuation logic for the PRHR Heat Exchanger (HX). The logic for one of the PRHR HX actuation signals that currently requires Low-2 steam generator (SG) narrow range (NR) water level coincident with Low-2 startup feedwater (SFW) flow in any SG is being modified to require Low-2 SG NR water level coincident with Low-2 SFW flow in both SGs coincident with the new Tcold - High in either RCS loop.
The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs acceptance review of this LAR. 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.
Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations (10 CFR), an application for an amendment to a license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.
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 LAR 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 and discussions during the pre-licensing meeting on October 15, 2024 (ML24290A158), the NRC staff has estimated that this licensing request will take approximately 425 hours0.00492 days <br />0.118 hours <br />7.027116e-4 weeks <br />1.617125e-4 months <br /> to complete. The NRC staff expects to complete this review by August 29, 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 LAR and they could change, due to several factors including requests for additional information, unanticipated addition of scope to the review, and review by NRC advisory committees or hearing-related activities.
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.
John G. Lamb, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
Hearing Identifier:
NRR_DRMA Email Number:
2750 Mail Envelope Properties (MN2PR09MB5084C797A860813A0448E30EFAA92)
Subject:
Acceptance Review - Vogtle 3 and 4 - Add New Tcold - High Function to TS 3.3.8 (L-2025-LLA0035)
Sent Date:
4/4/2025 10:17:26 AM Received Date:
4/4/2025 10:17:00 AM From:
John Lamb Created By:
John.Lamb@nrc.gov Recipients:
"Joyce, Ryan M." <RMJOYCE@southernco.com>
Tracking Status: None "Lowery, Ken G." <KGLOWERY@southernco.com>
Tracking Status: None Post Office:
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