NUHOMS® 32PT Dry Shielded Canister
The NUHOMS®-32PT Transportable DSC has a stainless steel outer shell and is double seal welded to ensure 100% reliable confinement for the NUHOMS® 40 year design life and beyond. The DSC has shielding at both ends to provide low exposure rates during canister sealing operations and during the storage campaign. The NUHOMS® 32PT DSC incorporates a innovative basket design that consists of a welded grid assembly of slotted crisscrossed welded stainless steel plates or tubular sections that make up 32 fuel compartments. Each compartment is sufficiently large to accommodate poison inserts and a PWR fuel assembly. The space between the inside diameter of the DSC shell and the fuel compartment grid assembly is bridged by "transition rails," which are made from solid aluminum sections connected to the fuel compartment structure. The fuel compartment plates transfer the spent fuel loads to the canister shell, via the transition rails. The transition rails distribute the mechanical loads from the fuel compartment grid to the DSC shell, and also provide a thermal conduction path for heat transfer from the basket to the shell, making it efficient in rejecting heat from its payload. Once loaded with fuel, the DSC is drained, vacuum dried, and backfilled with pure helium to provide an inert environment for the fuel and basket components during storage.
Payload
| PWR Fuel Assemblies |
32 |
| Maximum Burnup |
45 GWd/MTU |
| Minimum Decay Time |
5 Years |
| Maximum Enrichment |
5.0 w/o U235 |
| Thermal |
24 kW |
Materials of Construction
| Shell and Cover Plates |
Stainless Steel |
| Shield Plugs |
Carbon Steel |
| Basket Assembly |
Stainless Steel |
Physical Data
| Outside Diameter |
67" |
| Outside Length |
186" and 193" |
| Cavity Length, Short |
167" |
| Cavity Length, Long |
176" |
| Weight, Empty |
43,700 lbs. to 53,800 lbs. |
| Weight, Loaded |
88,000 lbs. to 102,000 lbs. |
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