ML25216A284

HI-STORM Umax Amendment 5 Responses to Requests for Additional Information

ML25216A284
Person / Time
Site:	HI-STORM 100
Issue date:	08/04/2025
From:	Elzahri A Holtec
To:	Melendez-Colon D Office of Nuclear Material Safety and Safeguards, Document Control Desk
Shared Package
ML25216A283	List: ML25216A284 ML25216A285 ML25216A286 ML25216A289 ML25216A290
References
1040RA
Download: ML25216A284 (1)

Text

Krishna P. Singh Technology Campus, 1 Holtec Blvd., Camden, NJ 08104 Telephone (856) 797-0900 Fax (856) 797-0909 Document ID: 5021081 Page 1 of 2 August 4, 2025 Ms. Daneira Melendez-Colon, Project Manager Division of Spent Fuel Management Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 72-1040 Certificate of Compliance (CoC) No. 1040RA

Subject:

HI-STORM UMAX Amendment 5 Responses to Requests for Additional Information

Reference:

[1] Clarification Call Addressing Structural Follow-ups to the Follow-ups to RAI Responses for the HI-STORM UMAX Amendment 5 Review (Docket 72-1040)

Conversation Record between Holtec and NRC associates dated April 30, 2025.

ADAMS Accession No. ML25125A289.

Dear Ms. Melendez-Colon:

By conversation dated April 30, 2025 [1], Holtec requested a clarification call with NRC staff regarding the RAIs. A follow up call was held on July 16, 2025, where Holtec provided some updates regarding the RAIs. Holtec is pleased to submit the Follow-Up to Follow-Up responses to the HI-STORM UMAX Amendment 5 Requests for Additional Information (RAI) asked by staff and discussed in Ref [1].

This submittal includes a response to the RAIs as Attachment 1. The full set of impacted HI-STORM UMAX FSAR changed pages are included as Attachment 2. Attachment 3 contains a proprietary structural calculation package. Attachment 4 contains a proprietary thermal calculation package. Attachment 5 contains the changed CoC pages. Since Attachments 3, and 4 contain proprietary information, Attachment 6 contains an affidavit requesting that these documents be withheld from public disclosure.

Krishna P. Singh Technology Campus, 1 Holtec Blvd., Camden, NJ 08104 Telephone (856) 797-0900 Fax (856) 797-0909 Document ID: 5021081 Page 2 of 2 If you have any questions or require any additional information, please contact me at 856-797-0900 ext. 3469.

Sincerely, Ali Elzahri Licensing Project Engineer Holtec International cc:(via email)

Kim Manzione (Holtec)

Yoira Diaz Sanabria (USNRC)

Attachments: : HI-STORM UMAX Amendment 5 RAI responses (non-proprietary) : Proposed HI-STORM UMAX FSAR Amendment 5-Changed Pages (non-proprietary) : HI-2125228 Revision 19 Structural Calculation package for the HI-STORM UMAX System (proprietary) : HI-2230586 Revision 2 Thermal Evaluation of HI-STORM UMAX at SONGS with Inlet Vent Flow Restrictions (proprietary) : Proposed HI-STORM UMAX CoC Amendment 5-Changed Pages (non-proprietary) : Affidavit Pursuant to 10CFR2.390 (non-proprietary)