Abstract: Storage containers (12) holding hazardous material are stacked in a drilled shaft (11) of a diameter slightly larger than the transverse dimension of the storage containers. Initially, a base plug (13) is lowered to the bottom of the shaft (11) and anchored there by means of a setting grouting compound introduced into a clearance space around the base plug. One end of a plurality of cables (15) long enough to extend from the bottom of the shaft to the upper end of the shaft are attached at anchoring points distributed around the periphery of the base plug (13). The storage containers are then successively lowered into the shaft within the space encircled by the cables (15) and stacked in the shaft. The stacking is discontinued well below the upper end of the shaft (11) to provide space for a backfill sealing the shaft.

Abstract: In a nuclear power installation a nuclear reactor (R) and other parts or components which are hazardous because of radioactivity or other hazard factors are placed in a lower part (12) of the installation which is located at a level deep below the ground level, whereas a ground-level part (11) of the installation comprises equipment for making the energy produced by the reactor useful. The deep-level part (12) of the installation includes a storage site (19) for spent nuclear fuel (29). These two pans (11, 12) of the installation are interconnected by a passageway which is suitably formed by one or more shafts.

Abstract: A container device (11) for the long-term storage of hazardous material, particularly for the ultimate disposal of nuclear fuel, comprises at least one elongate, cylindrical first containment body (A) having walls defining a first compartment (14) for accommodating at least one hazardous-material body (F) formed by the hazardous material or containing or supporting the hazardous material. The first compartment (14) comprises support means for supporting the hazardous-material body centrally in the first compartment and spaced from the walls thereof. The container device also comprises an elongate, cylindrical second containment body (B) having walls defining a cylindrical second compartment (22). The second compartment (22) comprises support means for supporting the first containment body (A) centrally in the second containment body (B) and spaced from the walls thereof.

Abstract: Abstract A container device (11) for the long-term storage of hazardous material F), particularly for use for the ultimate disposal of nuclear fuel, comprises a plurality of containment bodies (A, B, C, D), placed successively one with in the other. Each containment body comprises a casing wall and an upper and a lower end wall and has a compartment defined by these walls. The innermost containment body (A) holds the hazardous material and each of the other containment bodies B, C, D) contains a respective next inner containment body (A, B, C). Self-compacting concrete is used to fill the spaces between the containment bodies.

Abstract: Abstract A container device (11) for the long-term storage of hazardous material F), particularly for use for the ultimate disposal of nuclear fuel, comprises a plurality of containment bodies (A, B, C, D), placed successively one with in the other. Each containment body comprises a casing wall and an upper and a lower end wall and has a compartment defined by these walls. The innermost containment body (A) holds the hazardous material and each of the other containment bodies B, C, D) contains a respective next inner containment body (A, B, C). Self-compacting concrete is used to fill the spaces between the containment bodies.

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A container device (11) for the long-term storage of hazardous material, particularly for the ultimate disposal of nuclear fuel, comprises at least one elongate, cylindrical first containment body (A) having walls defining a first compartment (14) for accommodating at least one hazardous-material body (F) formed by the hazardous material or containing or supporting the hazardous material. The first compartment (14) comprises support means for supporting the hazardous-material body centrally in the first compartment and spaced from the walls thereof. The container device also comprises an elongate, cylindrical second containment body (B) having walls defining a cylindrical second compartment (22). The second compartment (22) comprises support means for supporting the first containment body (A) centrally in the second containment body (B) and spaced from the walls thereof.

Abstract: A container device (10) for storing hazardous material comprises a substantially cylindrical container block which has a central axial cylindrical through passage (13) and includes a group of storage vessels (12) for the hazardous material positioned between the central passage and the circumferential surface of the container block and which further includes a cylindrical concrete body (14) enveloping the group of storage vessels. The storage vessels (12) are positioned adjacent to one another along a closed curve, and sections of the circumferential surfaces of adjacent storage vessels (12) form the predominant part of the wall of the central passage (13). The concrete body directly contacts the storage vessels (12) over substantially all the parts of said circumferential surfaces, which do not constitute said sections. When the container device is made, the remaining parts of the circumferential surfaces of the storage vessels (12) form a permanent formwork in which the concrete body (14) is cast.

Abstract: A device for storing heat-generating hazardous material, particularly radioactive fuel for nuclear reactors, comprises a substantially cylindrical, reinforced concrete body (11) with a cylindrical through centre passage (13) and a plurality of axially elongate, substantially cylindrical storage spaces for accommodating the hazardous material which are disposed around and parallel to and radially spaced from the centre passage. The storage spaces are formed by sealed storage vessels (21) containing a fluid coolant and made of a heat-conducting material and being encapsulated in the concrete body (11). Heat transferred inwardly from the storage vessels (21) is carried away from the device by air or other fluid coolant flowing upwardly in the centre passage (13).

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A device for storing heat-generating hazardous material, particularly radio-active fuel for nuclear reactors, comprises a substantially cylindrical, reinforced concrete body (11) with a cylindrical through center passage (13) and a plurality of axially elongate, substantially cylindrical storage spaces for accommodating the hazardous material which are disposed around and parallel to and radially spaced spaced from the center passage. The storage spaces are formed by sealed storage vessels (21) containing a fluid coolant and made of a heat-conducting material and being encapsulated in the concrete body (11). Heat transferred inwardly from the storage vessels (21) is carried away from the device by air or other fluid coolant flowing upwardly in the center passage (13).

Abstract: A device for storing heat-generating hazardous material, particularly radio-active fuel for nuclear reactors, comprises a substantially cylindrical, reinforced concrete body (11) with a cylindrical through centre passage (13) and a plurality of axially elongate, substantially cylindrical storage spaces for accommodating the hazardous material which are disposed around and parallel to and radially spaced spaced from the centre passage. The storage spaces are formed by sealed storage vessels (21) containing a fluid coolant and made of a heat-conducting material and being encapsulated in the concrete body (11). Heat transferred inwardly from the storage vessels (21) is carried away from the device by air or other fluid coolant flowing upwardly in the centre passage (13).

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A device (10) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced concrete body (12) and has an axially elongate storage space (18) for the hazardous material. A prestressed reinforcement (17) having reinforcing members (28, 29) extending helically about the storage space (18) is provided in the concrete body (12) adjacent to the outer side thereof. Preferably, the reinforcing members (28, 29) are divided into two groups, one inside the other, the hand of the reinforcing members (28) of one of the groups being opposite to the hand of the reinforcing members (29) of the other group. Also preferably, the ends of the concrete body are provided with end covers (15, 16) in which the reinforcing members (28, 29) are anchored.

Abstract: A storage container for hazardous material, especially heat-generating hazardous material, comprises a central elongate, generally cylindrical concrete body having an elongate, sealable interior cavity for accommodating the hazardous material and a cooling liquid in which the hazardous material is immersed. The cavity comprises a generally cylindrical storage section concentric with the concrete body and an expansion chamber in fluid communication with the storage section. The expansion chamber is located axially outside on end of the storage section and extends radially past the circumference of the storage section. It is dimensioned such that when the cavity is filled with a predetermined quantity of the cooling liquid, the cooling liquid completely fills the storage section while still leaving room for expansion of the cooling liquid in the expansion chamber.

Abstract: A container for storing hazardous material and a method of enclosing hazardous material in a concrete container body defining a storage space and having an access opening for introducing the hazardous material in the storage space comprises fluid-tight sealing of the storage space by introducing a closure body of concrete in the opening subsequent to the introduction of the hazardous material. The closure body is formed by casting concrete in the access opening subsequent to the introduction of the hazardous material in the storage space and allowing the concrete to harden while supplying heat to the portion of the concrete container body surrounding the access opening.

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A device (10) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced concrete body (12) with an axially elongate storage space (18) for the hazardous material. A cylindrical central passage (11) open at both ends extends axially through the device (10). A plurality of cylindrical storage compartments (18) which form the storage space are disposed about the central passage (11) parallel to and radially spaced from it. Heat conveyed inwardly from the storage compartments (18) is dissipated from the device by air or water flowing upwardly in the central passage (11).

Abstract: A device (10) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced concrete body (12) and has an axially elongate storage space (18) for the hazardous material. A prestressed reinforcement (17) having reinforcing members (28, 29) extending helically about the storage space (18) is provided in the concrete body (12) adjacent to the outer side thereof. Preferably, the reinforcing members (28, 29) are divided into two groups, one inside the other, the hand of the reinforcing members (28) of one of the groups being opposite to the hand of the reinforcing members (29) of the other group. Also preferably, the ends of the concrete body are provided with end covers (15, 16) in which the reinforcing members (28, 29) are anchored.

Abstract: A device for the storage of hazardous waste, particularly radioactive waste, comprises a storage unit (10) comprised of an essentially cylindrical concrete body (11) having a central cavity for receiving a waste container (A) and passages for a flowing coolant arranged about the central cavity. The central cavity is defined by a vessel (13), preferably cylindrical and concentric with the concrete body (11), which is embedded in the concrete and hermetically sealable prior to the casting of the concrete. The coolant passages are defined by tubes (14) which are also embedded in the concrete and the lumens of which are in constant open communication with the interior space of the vessel (13).