List of Approved Spent Fuel Storage Casks: Holtec International HI-STORM UMAX Canister Storage System, Certificate of Compliance No. 1040, Amendment No. 5

What it does

The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its spent fuel storage regulations by revising the Holtec International HI-STORM UMAX Canister Storage System listing within the "List of approved spent fuel storage casks" to include Amendment No. 5 to Certificate of Compliance No. 1040. Amendment No. 5 revises the certificate of compliance to include two new versions of the HI-STORM UMAX design (Version B1 and B2).

The Nuclear Regulatory Commission's summary, as published in the Federal Register.

What it would change

1 part of Title 10 of the Code of Federal Regulations:

10 CFR 72

Before this

1 earlier Federal Register document under regulation identifier 3150-AL66 since Jan. 1, 2025.

• April 2, 2026 Direct final rule. List of Approved Spent Fuel Storage Casks: Holtec International HI-STORM UMAX Canister Storage System, Certificate of Compliance No. 1040, Amendment No. 5

Since then:

• June 1, 2026 Direct final rule; confirmation of effective date. List of Approved Spent Fuel Storage Casks: Holtec International HI-STORM UMAX Canister Storage System, Certificate of Compliance No. 1040, Amendment No. 5

What happens next and when

Submit comments by May 4, 2026. Comments received after this date will be considered if it is practical to do so, but the NRC is able to ensure consideration of only comments received on or before this date.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket NRC-2026-0562 on Regulations.gov
• Title 10 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register