ML24226B218

Cover Letter - Request for Additional Information for Review of the Magnastor Storage System Amendment No. 15, Certificate of Compliance No. 1031

ML24226B218
Person / Time
Site:	07201031
Issue date:	09/06/2024
From:	Donald Habib Storage and Transportation Licensing Branch
To:	Baldner H NAC International
Shared Package
ML24226B217	List: ML24226B218 ML24226B220
References
Certificate No. 1031, CAC 001028, EPID L-2023-LLA-0143
Download: ML24226B218 (1)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Heath M. Baldner, Director Licensing Engineering NAC International, Inc.

2 Sun Court, Suite 220 Peachtree Corners, GA 30092

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR REVIEW OF THE MAGNASTOR STORAGE SYSTEM AMENDMENT NO. 15, CERTIFICATE OF COMPLIANCE NO. 1031 - COST ACTIVITY CODE/ENTERPRISE PROJECT IDENTIFICATION NOS. 001028/L-2023-LLA-0143

Dear Mr. Baldner:

By letter dated August 29, 2023, (Agencywide Documents Access and Management System

[ADAMS] Accession No. ML23241B053), as supplemented on October 26, 2023 (ML23300A138), NAC International, Inc. (NAC) submitted an application to the U.S. Nuclear Regulatory Commission (NRC) for the amendment of the MAGNASTOR Cask Storage System certificate of compliance. In its application, NAC requested that the NRC amend the certificate of compliance with the following changes:

• Add a new variation of the Lightweight MAGNASTOR Transfer Cask (LMTC) Reduced Width LMTC.

• Add a new concrete cask design known as CC8. CC8 is based on the CC7 configuration and uses high density concrete for enhanced shielding.

• Increase the maximum system heat load capacity.

• Add new pressurized-water reactor (PWR) loading patterns L, M, and N.

• Add a Thermal Shunt to allow for short loading patterns.

• Add new boiling-water reactor loading patterns E and F.

• Remove 5 percent burn up "penalty".

• Increase Passive MAGNASTOR Transfer Cask (PMTC) heat load (30kW to 35.5kW including Preferential Loading Pattern B)".

• Revise previously approved drawings for the concrete cask for CC8, PMTC, and LMTC.

• Revise Technical Specification appendix A to include increased heat loads and loading patterns.

• Revise Technical Specification appendix B to include increased heat loads and loading patterns and removal of cool time tables B2-13 through B2-43.September 6, 2024 H. Baldner 2

• Add two new PWR fuel types to support future site operations.

• Modify the Transportable Storage Canister lid to allow additional clearance near the top center of the basket.

• Correct and clarify Principal Design Criteria, Operating Procedures, and the Acceptance Criteria and Maintenance Program.

In connection with our review, we need the information identified in the enclosure to this letter.

To assist us in scheduling our review of your response, we request that you provide this information within 30 calendar days from the date of this letter. Inform us at your earliest convenience, but no later than 30 calendar days from the date of this letter, if you are not able to provide the information by that time frame. Please note that, if you are unable to provide a response by October 7, 2024, our review may be delayed.

Please reference Docket No. 72-1031 and Cost Activity Code/Enterprise Project Identification Nos. 001028/L-2023-LLA-0143 in future correspondence related to this request. The NRC staff is available to clarify these questions, and, if necessary, meet to discuss your proposed responses.

In accordance with Title 10 of the Code of Federal Regulations Part 2, Agency Rules of Practice and Procedure, a copy of this letter will be available electronically for public inspection in the NRC Public Document Room (PDR) or from the Publicly Available Records component of the NRCs ADAMS. ADAMS is accessible from the NRC website at http://www.nrc.gov/reading-rm/adams.html. The PDR is open by appointment. To make an appointment to visit the PDR, please send an email to PDR.Resource@nrc.gov or call 1-800-397-4209 or 301-415-4737, between 8 a.m. and 4 p.m. eastern time (ET), Monday through Friday, except Federal holidays.

If you have any questions regarding this communication, please contact me at 301-415-1035, or via email to Donald.Habib@nrc.gov.

Sincerely, Donald Habib, Project Manager Storage and Transportation Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards Docket No. 72-1031 Certificate No. 1031

Enclosure:

1. RAIs Signed by Habib, Donald on 09/06/24

ML24226B217(pkg), ML24226B218(ltr), ML24226B220(encl),

OFFICE: NMSS/DFM NMSS/DFM NMSS/DFM NMSS/DFM NMSS/DFM NAME: DHabib WWheatley GZhao TBoyce ASotomayor-Rivera DATE: 8/28/2024 8/29/2024 8/29/2024 8/29/2024 8/29/2024 OFFICE: NMSS/DFM NMSS/DFM NMSS/DFM NMSS/DFM NMSS/DFM NAME: JSolis EGoldfeiz TGovan CSydnor DHabib DATE: 8/30/2024 8/30/2024 9/3/2024 9/4/2024 9/4/2024 OFFICE: NMSS/DFM NMSS/DFM NAME: YDiaz-Sanabria DHabib DATE: 9/6/2024 9/6/2024