HI-STORM Casks Locked In: Safer from Tumbles Now
Published Date: 3/13/2025
Rule
Summary
The NRC just updated the rules for storing used nuclear fuel with the HI-STORM 100 system by adding Renewed Amendment No. 19. This change improves how the system handles tipover accidents, making it safer when using special canisters with Metamic-HT baskets. If you use or manage these storage casks, expect better safety checks but no new costs or deadlines right now.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
HI‑STORM 100 tipover rules updated
The NRC revised the HI‑STORM 100 listing by adding Renewed Amendment No. 19 to Certificate of Compliance No. 1014. The amendment updates the acceptance criteria and method of evaluation for tipover accidents for equipment combinations using multi‑purpose canisters (MPCs) with Metamic‑HT baskets, applies a new stress‑based criteria, requires new evaluations, and adjusts existing deflection criteria.
No new costs or deadlines stated
The agency notes that adding Renewed Amendment No. 19 improves tipover evaluations for HI‑STORM 100 casks using MPCs with Metamic‑HT baskets. The summary states users or managers of these storage casks should expect better safety checks but that there are no new costs or deadlines right now.
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