Text

0. Issuance of Certificate of Compliance No. 1042, Amendment No. 4 for the NUHOMS Eos System, Cover Letter
	ML25211A335
Person / Time
Site:	07201042
Issue date:	09/03/2025
From:	Yoira Diaz-Sanabria; Storage and Transportation Licensing Branch
To:	Narayanan P; TN Americas LLC
Shared Package
ML25211A334	List: ML25211A335; ML25211A336; ML25211A337; ML25211A338;
References
	EPID L-2022-LLA-0017, CAC 001028
	Download: ML25211A335 (1)
	v • d • e

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Prakash Narayanan Chief Technical Officer TN Americas LLC 7135 Minstrel Way, Suite 300 Columbia, MD 21045

SUBJECT:

AMENDMENT NO. 4 TO CERTIFICATE OF COMPLIANCE NO. 1042 FOR THE NUHOMS EOS SYSTEM (DOCKET NO. 72-1042, CAC NO. 001028, ENTERPRISE PROJECT IDENTIFIER L-2022-LLA-0017)

Dear Mr. Narayanan:

As requested by your application dated September 29, 2022 (Agencywide Documents Access and Management System [ADAMS] Accession No. ML22272A575), as supplemented in letters dated March 30, 2023 (ML23089A175), June 28, 2023 (ML23179A120), April 22, 2024 (ML24113A307), November 6, 2024 (ML24311A209), and February 12, 2025 (ML25043A122),

enclosed is Amendment No. 4 to Certificate of Compliance (CoC) No. 1042 for the NUHOMS EOS System. The amended certificate constitutes the U.S. Nuclear Regulatory Commissions (NRCs) approval for use of the NUHOMS EOS System for storage of spent nuclear fuel under the general licensing provisions of Title 10 of the Code of Federal Regulations Part 72, Subparts K and L, subject to the conditions in the amended certificate. This amendment revises the CoC for the NUHOMS EOS System to include the following changes:

Change No. 1:

For the EOS-37PTH, incorporate the maximum allowable heat load configuration (MHLC), a method to determine new loading patterns based on the maximum allowable heat load per dry shielded canister (DSC). Two new heat load zone configurations are applicable to this MHLC for EOS-37PTH transferred in the transfer cask EOS-TC125 and stored in the EOS-HSM (horizontal storage module).

Change No. 2:

Introduce a steel-plate composite (SC) option of EOS HSM, EOS-HSM-SC, which allows for the HSM components to be constructed from concrete-filled integrated steel wall forms.

Change No. 3:

Introduce the use of MAVRIC software for a confirmatory run of the HSM-MX (NUHOMS MATRIX HSM) dose rates.

Change No. 4:

Technical Specification (TS) changes for consistency among DSC types and terminology clarification.

September 3, 2025

Change No. 5:

Various editorial corrections to updated final safety analysis report (UFSAR) for consistency and clarification.

Change No. 6:

Add measured exposures from past loading campaigns to highlight that measured exposures are significantly less than calculated exposures.

Additional Scope Change No. 1:

Allow the use of a blended Portland cement that would be certified to the requirements of American Society for Testing and Materials C595. Update and provide clarifying languages in UFSAR.

Additional Scope Change No. 6:

Address the use of the Matrix Loading Crane for the 61BTH Type 2 DSCs in UFSAR.

Additional Scope Change No. 8:

Clarify the scenarios under which the maximum heat loads can be reduced for EOS-37PTH, and update UFSAR and TS.

As stated in the Federal Register (90 FR 35589, July 29, 2025), the effective date of this CoC is October 14, 2025. The NRC safety evaluation report for this amended CoC (including the CoC itself and TS) is enclosed. If you have any questions regarding this amended certificate, please contact Yen-Ju Chen at (301) 415-1018.

Sincerely, Yoira Diaz-Sanabria, Chief Storage and Transportation Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards Docket No.: 72-1042 CAC No.: 001028 EPID: L-2022-LLA-0017

Enclosures:

1. Final CoC No. 1042, Amendment No. 4

2. Final Technical Specifications

3. Final Safety Evaluation Report Signed by Diaz-Sanabria, Yoira on 09/03/25

ML25211A334 (pkg),

ML25211A335 (Ltr), ML25211A336 (CoC),

ML25211A337 (TS), ML25211A338 (SER)

OFFICE:

NMSS/DFM NMSS/DFM NMSS/DFM NAME:

YChen WWheatley YDiaz-Sanabria DATE:

8/1/2025 8/1/2025 9/3/2025

v t e Letter Sequence Approval
CAC:001028, SR 3.5.1.2 Notation (Approved, Closed) EPID:L-2022-LLA-0017, Independent Spent Fuel Storage Installation - Request for a Temporary Exemption from 10 CFR 73, Appendix B, Section Le and 10 CFR 73.55(r) Annual Physical Requalification Requirement (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, ... further results\|Request]] Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance, Acceptance Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, ... further results\|Supplement]] Administration Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, ... further results\|Meeting]] Questions 22 January 2019 25 August 2021 17 January 2018 19 January 2018 23 February 2018 23 February 2018 23 February 2018 23 February 2018 27 February 2018 27 February 2018 23 February 2018 23 February 2018 27 February 2018 27 February 2018 28 February 2018 28 February 2018 28 February 2018 28 February 2018 28 February 2018 28 February 2018 28 February 2018 6 March 2018 6 March 2018 8 March 2018 8 March 2018 8 March 2018 8 March 2018 8 March 2018 8 March 2018 9 March 2018 9 March 2018 12 March 2018 22 March 2018 26 March 2018 28 March 2018 3 April 2018 3 April 2018 3 April 2018 3 April 2018 5 April 2018 5 April 2018 5 April 2018 5 April 2018 23 April 2018 23 April 2018 10 May 2018 17 May 2018 17 May 2018 29 June 2018 29 May 2018 13 September 2018 18 September 2018 ... further results Answers 21 September 2023 5 April 2018 29 March 2018 7 May 2018 10 April 2018 26 September 2018 22 April 2019 26 June 2019 22 April 2019 18 September 2019 1 November 2019 15 December 2019 31 March 2020 5 June 2020 10 July 2020 11 September 2020 11 November 2020 27 January 2021 9 February 2021 19 November 2021 30 November 2021 25 February 2022 7 June 2022 11 July 2022 13 July 2022 29 July 2022 31 August 2022 31 August 2022 9 September 2022 3 October 2022 3 October 2022 1 December 2022 21 December 2022 6 January 2023 27 January 2023 17 March 2023 8 May 2023 30 June 2023 22 April 2024 14 May 2024 4 November 2024 6 November 2024 Results Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, Approval, ... further results\|Approval]] Other: L-18-006, ISFSI - Site-Specific License Renewal Application, Revision 0, July 2018, L-23-005, Independent Spent Fuel Storage Installation License Renewal Application, Revision 1 (Cac/Epid No. 001028/L-2022-RNW-0007), ML17311A450, ML18018A018, ML18022A077, ML18022A078, ML18022A079, ML18087A056, ML18087A057, ML18087A058, ML18087A059, ML18087A060, ML18087A061, ML18087A062, ML18100A185, ML18100A188, ML18100A190, ML18100A191, ML18100A193, ML18101A024, ML18108A052, ML18131A047, ML18131A048, ML18141A561, ML18141A562, ML18141A563, ML18141A564, ML18141A565, ML18141A567, ML18179A258, ML18179A260, ML18179A266, ML18201A455, ML18205A179, ML18222A351, ML18228A530, ML18228A531, ML18228A532, ML18228A533, ML18234A012, ML18248A121, ML18255A093, ML18255A094, ML18255A096, ML18255A097, ML18255A098, ML18255A101, ML18255A102, ML18324A577, ML18324A594... further results
MONTHYEAR2018-01-11 [Table View]

ML25211A335

Text

SUBJECT:

Dear Mr. Narayanan:

Enclosures:

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