Canisters & Casks

Used Fuel Dry Storage Canister Systems

More than 1,290 of our dry fuel storage (DFS) systems have been successfully loaded at more than 30 sites in the U.S. We have helped customers extend the life of their storage systems for additional licensed periods by conducting NUHOMS system inspections and working closely with the site and the U.S. NRC staff. The experience gained and lessons learned from past projects contribute to significant cost and time savings in the engineering and construction phases of new projects, as well as long-term savings during the operational phase.

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More on Used Fuel Storage

• NUHOMS EOS 37PTH & EOS 89BTH

  Orano's NUHOMS^® EOS 37PTH and 89BTH Dry Shielded Canisters (DSC) are a high-capacity, high-burnup, and high-heat load system for PWR and BWR dry used fuel storage needs. The 37PTH DSC is designed to store and transport 37 PWR used fuel assemblies with or without channels. The 89BTH DSC is designed to store 89 BWR used fuel assemblies.
  
  The EOS 37PTH and EOS 89BTH baskets securely hold the assemblies within the canister and are constructed using alloy steel, aluminum, and Metal Matrix Composite (MMC) plates configured into an egg crate design. Geometric spacing, fixed neutron absorbers and soluble burn maintain criticality control for fuel enrichments up to 5.0% U235.

• NUHOMS 32PTH CANISTER

  The NUHOMS 32PTH Canister is a 32-cell high-heat canister design that offers users the capability to store high burnup short-cooled PWR fuel in a high-capacity package. While this design is optimized for use in facilities with higher crane capacity, this canister can also be used with a light-weight transfer cask to remain under 90.7 MT. The 32PTH Canister incorporates a 76.2 mm larger canister diameter than the 24PTH. The basket geometry is similar to the egg crate basket geometry of the 24PTH Canister.

• NUHOMS 24PTH Canister

  The NUHOMS -24PTH Canister is a 24-cell high-decay heat Transportable Dry Shielded Canister for PWR used fuel. This canister is optimized for heat while maintaining the full shielding capability of the transfer cask and remaining under 90.7 MT. This canister is made from a stainless-steel outer shell, carbon steel top and bottom shield plugs, and two top cover plates. This canister incorporates the same closure weld design used in more than 1,200 NUHOMS systems. The 24PTH Canister incorporates an innovative “egg crate” basket design which benefits from the experience gained on several generations of NUHOM canisters.

• NUHOMS EOS HSM (Horizontal Storage Module)

  The EOS HSM provides a self-contained modular structure for the storage of used nuclear fuel in an EOS 37PTH, 32PTH or 24PTH canister. The EOS HSM is constructed from reinforced concrete and structural steel. The thick concrete roof and walls provide substantial neutron and gamma shielding. The EOS HSMs are installed on a load-bearing foundation, which consists of a reinforced concrete basemat on a subgrade suitable to support the loads. The EOS HSM provides a means of removing used fuel decay heat by a combination of radiation, conduction, and convection. Ambient air enters the EOS HSM through ventilation inlet openings on both sides of its lower front wall and circulates around the DSC and the heat shields. Air exits through air outlet openings on each side of the top of the EOS HSM. The passive cooling system for the EOS HSM is designed to preserve fuel cladding integrity by maintaining SFA peak cladding temperatures below acceptable limits during long-term storage.

• NUHOMS HSM-MX (Matrix)

  The HSM-MX provides a self-contained and condensed modular structure for the storage of used fuel in an EOS-37PTH, 32PTH, 24PTH, EOS 89BTH, or 61BTH canister. The HSM-MX is a proven dry fuel storage system that provides a universal space-saving solution with aging management capabilities. The HSM-MX will permit sites to store 40% to 45% more used nuclear fuel within the same footprint of competing technologies. This allows sites to extend the life of their current Independent Spent Fuel Storage installations and extends the ISFSI expansion need date, which may provide significant cost savings.

• NUHOMS HSM-H/HS

  The NUHOMS HSM-H offers increased seismic capacity, superior shielding performance, significantly enhanced heat rejection capabilities and ruggedness for the storage of used fuel in a EOS 37PTH, 32PTH, 32PTH1, 32PTH Type 1, 24PTH, EOS 89BTH, 69BTH, or 61BTH canister. Each HSM is provided with internal heat shields, shield door and DSC support structure.
  
  HSM-HS is a high seismic version of HSM-H, designed for sites with 1.0 g horizontal and 1.0 g vertical seismic accelerations.