ML26064A053

Issuance of Certificate of Compliance No. 1042 Amendment No. 5 for the NUHOMS Eos System Cover Letter

ML26064A053
Person / Time
Site:	07201042
Issue date:	03/13/2026
From:	Yoira Diaz-Sanabria Storage and Transportation Licensing Branch
To:	Narayanan P TN Americas LLC
Yilma H
References
EPID L-2024-LLA-0143, CAC 001028
Download: ML26064A053 (0)

Text

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. 5 TO CERTIFICATE OF COMPLIANCE NO. 1042 FOR THE NUHOMS EXTENDED OPTIMIZED STORAGE SYSTEM (DOCKET NO. 72-1042, COST ACTIVITY CODE SYSTEM NO. 001028, ENTERPRISE PROJECT IDENTIFIER L-2024-LLA-0143)

Dear Mr. Narayanan:

As requested by your application dated February 26, 2025 (Agencywide Documents Access and Management System [ADAMS] Accession No. ML25057A456), as supplemented on August 28, 2025 (ML25240B483), enclosed is Amendment No. 5 to Certificate of Compliance (CoC) No.

1042 for the NUHOMS Extended Optimized Storage (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 (10 CFR) 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:

Addition of a new heat load zone configuration (HLZC) for the EOS-37PTH, HLZC 14, which allows an increase in the maximum heat load of the EOS-37PTH to 54 kW per dry shielded canister (DSC) for storage in the EOS-Horizontal Storage Module (HSM) and transfer operations in the EOS-Transfer Casks (TC)125/135. HLZC 14 is only permitted in Basket Type 4HA introduced in Amendment No. 4 to CoC No. 1042 with anodized aluminum. No physical changes are considered for this basket type in this application.

An optional support spacer is considered for the flat plate support variant of EOS-Horizontal Storage Module (HSM) as described in the application (EOS-HSM-FPS).

Change No. 2:

Editorial corrections are included as part of this amendment application:

o Section 2.4.2.1 of the updated final safety analysis report (UFSAR) has been revised to clarify that the heat load for any single assembly is 4.3 kW for the EOS-37PTH DSC. This is an editorial correction based on HLZC 12 included as part of the application for Amendment No. 4 to CoC No. 1042.

o Note 3 of figure 2-3m (Heat Load Zone Configuration 13 for the EOS-37PTH DSC) has been revised to enhance readability.

March 13, 2026

o Technical specification (TS) figures 1A and 1J have been revised to clarify the location of HLZC 1 and 10 for EOS-37PTH. For figure 1A, a note was added to indicate HLZC 1 is now described in UFSAR chapter 2, figure 2-3a. For figure 1J, a note was added to indicate HLZC 10 is now described in the UFSAR chapter 2, figure 2-3j.

o TS section 4.4.4 - Alternatives to Codes and Standards, under the table column Justification and Compensatory Measures for reference ASME code section NB-5520 be revised to invoke Table NCA-7100-2, as opposed to the current listing of NCA-7000-1.

Change No. 3:

Clarification regarding acceptance criteria for minor surface imperfections on high-strength low-alloy (HSLA) basket plates within the UFSAR.

As stated in the Federal Register (90 FR 35589, July 29, 2025), the effective date of this CoC is April 13, 2026. The NRC safety evaluation report for this amended CoC (including the CoC itself and TS) is enclosed.

In accordance with 10 CFR 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 amended certificate, please contact Haimanot Yilma at (301) 415-5286 or Haimanot.Yilma@nrc.gov.

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-2024-LLA-0143

Enclosures:

1. CoC No. 1042, Amendment No. 5

2. Technical Specifications

3. Safety Evaluation Report Signed by Diaz-Sanabria, Yoira on 03/13/26

SUBJECT:

AMENDMENT NO. 5 TO CERTIFICATE OF COMPLIANCE NO. 1042 FOR THE NUHOMS EXTENDED OPTIMIZED STORAGE SYSTEM (DOCKET NO. 72-1042, COST ACTIVITY CODE SYSTEM NO. 001028, ENTERPRISE PROJECT IDENTIFIER L-2024-LLA-0143) - SUPPLEMENTAL CONCURRENCE DOCUMENT DATED: March 13, 2026 DISTRIBUTION:

DFM r/f SHelton, NMSS ADAMS Accession Nos.: PKG: ML26064A054, Main: ML26064A053, Encl 1: ML26064A056, Encl 2: ML26064A057, Encl 3: ML26064A058 econcurrence: 20260305-70015