ML24351A141

The U.S. Nuclear Regulatory Commission Staffs Revised Schedule for the Review of Mitsubishi Electrical Corporations Topical Report, JEXU-1041-1008, Revision 3, Safety System Digital Platform - Meltac

ML24351A141
Person / Time
Site:	99902039
Issue date:	12/23/2024
From:	James Smith Licensing Processes Branch
To:	Modro C Mitsubishi Electric Power Products
References
EPID L-2023-TOP-0036
Download: ML24351A141 (4)

Text

December 23, 2024 Chad Modro, Department Manager Nuclear Systems Department Mitsubishi Electric Power Products Inc.

1-1-2 Wadasaki, Hyogo Kobe, Japan 652-8555

SUBJECT:

THE U.S. NUCLEAR REGULATORY COMMISSION STAFFS REVISED SCHEDULE FOR THE REVIEW OF MITSUBISHI ELECTRICAL CORPORATIONS TOPICAL REPORT, JEXU-1041-1008, REVISION 3, SAFETY SYSTEM DIGITAL PLATFORM - MELTAC (EPID L-2023-TOP-0036)

Dear Chad Modro:

By letters dated March 15, April 25, May 16, and August 23, 2024 (Agencywide Documents Access and Management System (ADAMS) Package Accession No. ML24075A314, Accession No. ML24117A209, Accession No. ML24137A151, and Accession No. ML24236A706, respectively), Mitsubishi Electrical Corporation (MELCO) submitted supplemental information to Topical Report (TR) JEXU-1041-1008, Revision 3, Safety System Digital Platform - MELTAC, for U.S. Nuclear Regulatory Commission (NRC) staffs review. The NRC staff had agreed to consider the supplement information as part of the ongoing review of JEXU-1041-1008, Revision 3, in discussions with MELCO representatives.

The NRC staff has found that the supplemental information is sufficient to begin its detailed technical safety review of the new information in combination with the initial June 16, 2023, JEXU-1041-1008, Revision 3, submittal (ADAMS Package Accession No. ML23167C167).

Below are discussions and the NRC staffs rationale for planned schedule revisions and level of effort increases to accommodate review of the supplemental information and the overall TR.

Based on the information provided in your submittal, the NRC staff plans to review the responses to the Requests for Additional Information (RAIs) by December 20, 2024, issue the draft safety evaluation (SE) by June 13, 2025, and final SE by September 12, 2025, as annotated in the enclosed schedule. The draft SE completion date assumes 60 days for RAI responses, but will be adjusted, if necessary, to accommodate any delays in the responses. The enclosed schedule provides dates for the initial planned, actual, and revised milestones for the overall review.

Additionally, the NRC staff estimates that it will require an increase of approximately 250 hours0.00289 days <br />0.0694 hours <br />4.133598e-4 weeks <br />9.5125e-5 months <br /> to the current 880 hours0.0102 days <br />0.244 hours <br />0.00146 weeks <br />3.3484e-4 months <br /> that was planned for the initial August 16, 2023, submittal, for a total of 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> to complete the safety review. The Advisory Committee on Reactor Safeguards (ACRS) does not plan to review this TR, and as such, no subcommittee nor full committee meetings are expected to be scheduled.

Section 170.21 of Title 10 of the Code of Federal Regulations requires that TRs are subject to fees based on the full cost of the review. You did not request a fee waiver; therefore, NRC staff-hours will be billed accordingly.

If you have any questions regarding the TR review, please contact me at 301-415-4116 or via email at Jeffery.Smith@nrc.gov.

Sincerely,

/RA/

Jeffery Smith, Project Manager Licensing Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No.: 99902039

Enclosure:

Initial Planned, Actual, and Revised Schedule

Enclosure Initial Planned, Actual, and Revised Schedule Milestone Initial Planned Actual Revised Initial Submittal Aug. 18, 2023 Aug. 16, 2023 Acceptance Aug. 18, 2023 Aug. 16, 2023 Audit-1 Sep. 25, 2023 Sep. 25, 2023 Issued Requests for Additional Information (RAI) - Set #1 Dec. 19, 2022 Jan. 19, 2024 Response to RAIs - Set #1 Mar. 15, 2024 Aug. 23, 2024 Supplemental Information Dec. 2023 Feb. 21, 2024 Issue RAIs - Set #2 Oct. 18, 2024 Oct. 23, 2024 Response to RAIs - Set #3 Nov. 22, 2024 Nov. 12, 2024 Issue Draft SE Nov. 22, 2024 Jun. 13, 2025 Issue Final SE Mar. 11, 2025 Sep. 12, 2025

ML24351A141

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