A tamper-indicating assembly for a drum enclosure assembly is provided. The tamper-indicating assembly includes a tamper-indicating device that defines a cavity sized to receive and surround at least a portion of the closure bolt, the first flanged end, and the second flanged end to prevent movement of the closure bolt. A tab extends radially outward from the tamper-indicating device with respect to an axial centerline of the tamper-indicating assembly. The tamper-indicating assembly further includes a pin non-removably coupled to the tamper-indicating device. The pin extends through the tamper-indicating device and across the cavity such that the tamper-indicating device and the pin collectively surround the closure bolt. The exemplary tamper-indicating device described herein includes features that facilitate the robotic application of the tamper-indicating device to a drum enclosure.

A method of improving residual stress in a canister in which fuel assemblies are loaded includes, when the canister having a cylindrical canister shell and a canister lid welded to the upper opening of the canister shell is disposed in a cylindrical cask body, filling the space above and around an upper end portion of the canister in the cask body with fill water. Then, compressive stress is applied to a predetermined region of the upper end portion of the canister in the fill water. This makes it possible to readily apply compressive stress to the canister while shielding radioactive rays by the fill water.

A method of improving residual stress in a canister in which fuel assemblies are loaded includes, when the canister having a cylindrical canister shell and a canister lid welded to the upper opening of the canister shell is disposed in a cylindrical cask body, filling the space above and around an upper end portion of the canister in the cask body with fill water. Then, compressive stress is applied to a predetermined region of the upper end portion of the canister in the fill water. This makes it possible to readily apply compressive stress to the canister while shielding radioactive rays by the fill water.

A nuclear waste cask with impact protection includes impact limiters comprising deformable energy-absorbing perforated sleeves. An impact amelioration system for nuclear fuel storage components includes impact limiter assemblies at the bottom cask to canister interface including impact limiter plugs frictionally engaging corresponding plug holes formed in the cask closure plate. A nuclear waste fuel storage system includes an unventilated cask including a heavy free-floating radiation shielding lid loosely coupled the top end of the cask in a movable manner via the anchor bosses which provides cask over pressurization protection. A nuclear waste cask includes an axially elongated rectangular cuboid cask body having a cavity for holding nuclear waste materials and cask locking mechanism including first locking protrusions on the lid which are selectively interlockable with mating second locking protrusions on the cask body to lock the lid to the cask body.

A nuclear waste cask with impact protection includes impact limiters comprising deformable energy-absorbing perforated sleeves. An impact amelioration system for nuclear fuel storage components includes impact limiter assemblies at the bottom cask to canister interface including impact limiter plugs frictionally engaging corresponding plug holes formed in the cask closure plate. A nuclear waste fuel storage system includes an unventilated cask including a heavy free-floating radiation shielding lid loosely coupled the top end of the cask in a movable manner via the anchor bosses which provides cask over pressurization protection. A nuclear waste cask includes an axially elongated rectangular cuboid cask body having a cavity for holding nuclear waste materials and cask locking mechanism including first locking protrusions on the lid which are selectively interlockable with mating second locking protrusions on the cask body to lock the lid to the cask body.

A system for the storage of a radioactive waste product, wherein the radioactive waste product is located in a container and where one or more containers are stored in a bore hole drilled beneath a surface and having a bottom, wherein following placement of the one or more containers in the bore hole closer to the bottom, a fluid is added to the bore hole to a height above the upper most container, and wherein an upper cover is located above the upper most container and above the fluid to seal in the one or more containers and a non-permeable material is placed above the upper cover, a container storage area being formed within the bore hole beneath the upper cover.

An assembly for transferring an element from or towards the inside of a closed contaminated enclosure having an opening. The transfer assembly includes a first door closing substantially sealingly the opening of the contaminated enclosure and a transfer box delimiting an enclosed space and having an opening closed by a second door configured to pivot towards the inside of the transfer box, the first door and the second door each having at least one coupling member configured to allow the coupling of the first door and of the second door and configured to allow the first door and the second door, coupled to one another, to pivot towards the inside of the transfer box.

An assembly for transferring an element from or towards the inside of a closed contaminated enclosure having an opening. The transfer assembly includes a first door closing substantially sealingly the opening of the contaminated enclosure and a transfer box delimiting an enclosed space and having an opening closed by a second door configured to pivot towards the inside of the transfer box, the first door and the second door each having at least one coupling member configured to allow the coupling of the first door and of the second door and configured to allow the first door and the second door, coupled to one another, to pivot towards the inside of the transfer box.

A module for storing high level radioactive waste includes an outer shell, having a hermetically closed bottom end, and an inner shell forming a cavity and being positioned inside the outer shell to form a space therebetween. At least one divider extends from the top to the bottom of the inner shell to create a plurality of inlet passageways through the space, each inlet passageway connecting to a bottom portion of the cavity. A plurality of inlet ducts each connect at least one of the inlet passageways and ambient atmosphere, and each includes an inlet duct cover affixed atop a surrounding inlet wall, the inlet wall being peripherally perforated. A removable lid is positioned atop the inner shell and has at least one outlet passageway connecting the cavity and the ambient atmosphere, the lid and the top of the inner shell being configured to form a hermetic seal therebetween.

A shipping container comprises a tubular or cylindrical shell having a closed end and an open end, a top end-cap removably secured to the open end of the tubular or cylindrical shell, and at least one fuel assembly compartment defined inside the shell. Each fuel assembly compartment includes elastomeric sidewalls and is sized and shaped to receive an unirradiated nuclear fuel assembly through the open end of the shell. The shipping container may further include a divider component, for example having a cross-shaped cross-section with ends of the cross secured to inner walls of the shell, and the divider component and the inner walls of the shell define the fuel assembly compartments. To load, the shipping container is arranged vertically and an unirradiated nuclear fuel assembly is loaded through the open end of the shell into each compartment, after which the open end is closed off by securing the top end-cap.