Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 144 / 257 FIGURE 54: HORIZONTAL STORAGE MODULES Dry storage in TN NOVA (vertical storage modules) The TN NOVA system is evolved from the NUHOMS ® canister system, It differs with the NUHOMS® system only by a vertical metallic storage overpack instead of the horizontal concrete module which surrounds the canister in the storage configuration. At the storage facility location, the loaded transfer cask is aligned with the TN NOVA overpack and the DSC canister is then transferred to the overpack in a horizontal position. Once the transfer is complete, the TN NOVA overpack is placed upright in a vertical position for storage. Once inside the TN NOVA overpack, the DSC is in a safe, passive dry storage configuration. The TN NOVA overpack provides radiological shielding and physical protection for the Canister. The TN NOVA overpack is constructed primarily of carbon steel. It has internal air flow passages to provide natural convection cooling for removal of decay heat from the Canister’s spent fuel. The overpack is well shielded to keep doses ALARA. Additionally, the TN NOVA provides aircraft impact and earthquake resistance.
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 145 / 257 FIGURE 55: TRANSFER TRAILER WITH CASK SUPPORT SKID Spent Fuel Dry Storage in Vault FIGURE 56: TN NOVA UPRIGHTING OPERATIONS The storage of spent fuel in a dry vault ensures safe and sustainable storage conditions. It involves the sealing of spent fuel in canisters and the placement of those canisters in storage wells set into a reinforced concrete slab. The operations within the facility include: · Transport container receipt and preparation for unloading; · Dry unloading of fuel assemblies and placement into canisters; · Canister welding and transfer to the storage vault; · Placement of the canister into the storage well and well closure.
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A 2008-11-26 Sarah Greenwood Gary C
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Solid Radioactive Waste Strategy Report.pdf - UK EPR

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