List of Approved Spent Fuel Storage Casks: Holtec International HI-STORM Flood/Wind System, Certificate of Compliance No. 1032, Amendment No. 10
Key claim: The NRC is amending its spent fuel storage regulations to add Amendment No. 10 to Holtec’s HI-STORM FW Certificate of Compliance No. 1032, incorporating an extended configuration, higher heat-load loading patterns, radiological fuel-qualification methodology, reduced cooling-time requirements, and refined missile-impact analysis.
Abstract
(Rule · Nuclear Regulatory Commission) The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the Holtec International HI- STORM Flood/Wind (FW) System listing within the “List of approved spent fuel storage casks” to include Amendment No. 10 to Certificate of Compliance (CoC) No. 1032. Amendment No. 10 revises the CoC for the HI-STORM FW dry storage system to incorporate several enhancements. These changes include the introduction of the HI-STORM FW Extended Configuration, adoption of a methodology for developing site-specific loading patterns with higher allowable per-canister and per-cell heat- load limits, incorporation of a radiological fuel-qualification methodology, reduction of minimum cooling-time requirements for certain multi-purpose canister models based on updated evaluations, and refinement of the missile-impact analysis methodology to allow site- specific credit for the HI-TRAC VW water-jacket shell. The amendment also includes a minor editorial clarification.
Why this matters
Dry cask storage is the primary near-term solution for spent commercial reactor fuel while a long-term repository remains unresolved, so incremental amendments to approved cask certificates directly shape how much fuel utilities can offload from pools and at what cost. Adding higher heat-load loading patterns and reduced cooling times to the HI-STORM FW system lets operators load casks sooner with hotter assemblies, easing pool congestion but tightening reliance on updated fuel-qualification and missile-impact analyses.