A method of manufacturing a single site for the disposal of radioactive metal waste and monoblock site for the disposal of radioactive metal waste
(57) Abstract:Usage: for the disposal of radioactive metal waste. The inventive method enables the production of single node consisting of a shell, a bottom and a lid. As the shell using a segment of radioactively contaminated piping of a nuclear reactor. Before attaching and the cover shell in the volume formed by the shell and the bottom, pour the pre-molten metal radioactive waste. 2 S. and 1 C.p. f-crystals, 2 Il. The invention relates to a method of manufacturing a single site for the disposal of radioactive metal waste and to monoblock site manufactured by the above method.A known method of manufacturing a single site for the disposal of radioactive metal waste, in which the hollow shell is attached to the bottom and the cover, and one node with a bottom and a lid attached to the membrane 
The basis of the invention is to create such a method of manufacturing a single site for the disposal of radioactive metal waste, which would allow the storage of radioactive metal waste and was given the opportunity to repeat the B/G, 0,37 B/G).The technical result of the invention is the avoidance or reduction of operations decontamination.Another part of the problem of the invention is to provide a single site for the disposal of radioactive metal waste, made according to the above method.This problem is solved due to the fact that the method according to the invention, the shell uses a segment of radioactively contaminated piping of a nuclear reactor, and before attaching to the cover shell in the volume formed by the shell and bottom, pre-poured molten metal radioactive waste.Another part of the problem is solved due to the fact that the shell monoblock node formed by the cut of radioactively contaminated piping of a nuclear reactor, the internal volume of this node is pre-filled with the molten metal radioactive waste.Preferably, the internal volume of a single node was previously filled with molten metal radioactive waste and added a melting slag, and in the upper part of the volume of the water was recorded, cenie monoblock node according to the invention.When the operations of dismantling nuclear reactors are formed of low or clubsarizona metal radioactive waste. This particularly applies to the case of the primary circuit of the reactor, when the typical contamination of surface 74 B/G diameter 1600 mm, thickness 25 mm, Taking into account the specific dimensions of the tubing forming the primary circuit, the activity in the mass of this system of pipes is 3.8 B/,The method in accordance with the present invention is that the cut portion of the pipelines of the primary circuit of a nuclear reactor (Fig,1), length of, for example, from 1.3 to 1.6 mSegment 1 of radioactively contaminated pipeline contains on its inner wall layer 2 from activated corrosion products or products of radioactive decay. This portion 1 forms a hollow shell of a single node, as shown in Fig.2. Then pour plate base, intended for the formation of the bottom 3 and the cover 4 monoblock site. For the formation of the above-mentioned bottom 3 and the lid 4 can, for example, to use your metal, for example, a support system of pipes, which are widely used in nuclear power plants. After this operation is fixed, for example, by welding to one of cocoaspell. These contaminated metal waste can be melted, for example, in an induction furnace operating at a frequency of network and having at the base of the liquid bath, or on the average frequency without liquid bath at the base, and the environmental pollution is prevented exhaust Cabinet in which the battery serial filters collect dust arising from the operation of casting. The molten metal in the furnace can be similarly transformed into the cast iron with the introduction of graphite in the metal mass in the range of up to 3% After the operation of casting the molten metal into the inner volume one node is fixed, e.g. by welding, at the other end of the segment 1 of the top cover 4, when this takes place the following:If cast metal in the mass has activity below the permissible limit of 1.0 B/G, produce a casting in one node only steel or cast iron for use in the foundry industry as a metal support.If cast metal has an activity higher than the permissible limit of 1.0 B/G, in the above-mentioned site is filled with molten metal 5, foundry slag 6 and fix the specified cement 7 in the upper part of the container before the lid 4 (Fig.2).This mod is her hand monoblock site is not infected.You can also be provided on the outer part of the segment 1 and the cover 4 rings 8 for engagement with the transportation of the specified single node.The method in accordance with the present invention allows to reduce the volume occupied by the molten waste, compared with the waste stored in bulk in containers, the payout amount is from 7 to 15, which reduces the cost of storage. This eliminates or reduces operations decontamination for light structures and to reduce the amount of required drilling fluid.In addition, this method also enables the dilution of surface activity in the volume sold ingot, which leads to increased radiological protection by autophagosome.In addition, elements such as cesium will migrate in the slag, while cobalt-60 will remain fixed in a metal ingot.The present invention can also be used for the disposal of radioactive metal waste not originating from the reactor graphite - gas, as, for example, when removing water-cooled. 1. A method of manufacturing a single node for utilise fact, what's in the envelope, use a segment of radioactively contaminated piping of a nuclear reactor, and before attaching to the cover shell in the volume formed by the shell and the bottom, pour the pre-molten metal radioactive waste.2. All-in-one site for the disposal of radioactive metal waste containing shell, a bottom and a cover attached to the shell, wherein the shell is formed by a cut of radioactively contaminated piping of a nuclear reactor, the internal volume of a single node is pre-filled molten metal radioactive waste.3. All-in-one site on p. 2, characterized in that the internal volume of the pre-filled molten metal radioactive waste and added a melting slag, and in the upper part of the volume of water recorded by the cement.
FIELD: safety facilities for handling radioactive materials.
SUBSTANCE: proposed internal container designed for long-time storage and transport of high-radioactivity materials such as plutonium dioxide has container body closed with sealed cover and specified-volume charging box placed in this body and provided with its respective cover. Container body has cylindrical passage for charging box that mounts additional internal cover provided with gas filtering device and hermetically installed relative to its surface for axial displacement. External cover of container body is provided with shut-off valve accommodating gas filtering device installed therein between inner space of container and valve seat. Such mechanical design of container enables reducing irreparable loss of plutonium during its long-time storage and transport.
EFFECT: enhanced safety and reliability , enlarged functional capabilities of container.
7 cl, 2 dwg
FIELD: handling radioactive wastes.
SUBSTANCE: proposed method for nuclear fuel storage in container includes introduction of nuclear fuel in fuel collector, as well as preparation of formwork to receive concrete body and installation of fuel collector into formwork. Formwork is immersed in tank and concrete is placed in immersed formwork to form concrete housing. Formwork with concrete housing formed therein is extracted from tank. System for manufacturing nuclear fuel storage container and for holding fuel in fuel collector installed in concrete housing that forms part of storage container has water tank. In addition it has tools for assembling formwork for storage container concrete housing and facilities for conveying formwork and fuel collector to water tank. It also has facilities for introducing nuclear fuel in fuel collector, facilities for concrete placement in formwork, and those for removing formwork from water tank. Nuclear fuel storage method includes piling of containers so that their central channels are aligned and held open for intercommunication. Fluid cooling agent is supplied to bottom end of central channel in lowermost storage container and discharged from top end of central channel in uppermost storage container.
EFFECT: enhanced reliability of radioactive waste isolation.
25 cl, 7 dwg
FIELD: storage of hazardous materials.
SUBSTANCE: proposed device for keeping in storage hazardous materials such as spent radioactive nuclear fuel has cylindrical concrete housing accommodating three-dimensional pre-stressed hardware and axially elongated hazardous-material storage area. Pre-stressed hardware includes hardware fittings spirally passed about storage area and disposed in concrete housing close to outer surface.
EFFECT: enhanced reliability of hazardous material storage.
7 cl, 8 dwg
FIELD: shipment and storage of highly active wastes.
SUBSTANCE: proposed container for transport and dry storage of spent nuclear fuel has hermetically sealed storage tank and can holding spent nuclear fuel. In addition, it has external steel-reinforced concrete casing with outer and inner metal shells and bottom, cooling ducts, and fixing dampers. Hermetically sealed tank is provided with transport ring that holds shell in position relative to longitudinal axis of casing and with three detachable lids. It is also provided with dampers disposed over entire perimeter of inner cylindrical shell that function to lock cylindrical shell on lid and outer steel-reinforced concrete casing and to transfer heat therefrom. Cooling system is designed so that cooling air flows through cylindrical gap between outer surface of tank and inner surface of external steel-reinforced concrete casing over cooling ducts.
EFFECT: enhanced operating reliability of container.
5 cl, 4 dwg
FIELD: handling spent nuclear fuel.
SUBSTANCE: proposed module designed for storage of spent nuclear fuel has tight case with inner space to receive spent nuclear fuel. Module is provided with ring made of solid ferromagnetic material possessing magnetocaloric properties. Ring is provided with drive and is free to rotate about its axis. It is disposed so that part of this ring is inside module in immediate proximity of tight tank holding spent nuclear fuel. Other part of ring is placed in constant magnetic field outside of module and can be cooled.
EFFECT: enhanced safety of spent nuclear fuel dry storage.
1 cl, 2 dwg
FIELD: nuclear engineering.
SUBSTANCE: proposed device for storage and/or transport of spent nuclear fuel has housing and cover forming inner space for holding spent nuclear fuel. Inner space is divided by means of partitions into compartments, each compartment being meant to receive spent fuel assembly. Each compartment accommodates two tanks holding metal hydride or intermetallic compound. These tanks are provided with channels pressurized with respect to inner space of device which are used to discharge hydrogen produced due to heat released by fuel assembly. Hydrogen outlet channels are designed for charging metal hydride through them and are provided with closing valves.
EFFECT: enhanced reliability of spent nuclear fuel storage and its safety in transit.
1 cl, 3 dwg
FIELD: transport and storage of spent nuclear fuel.
SUBSTANCE: proposed method includes placement of fuel assemblies in transport package incorporating container and split damping casing designed so as to minimize lift of container when inserting it in split damping casing. Transport package is conveyed to storage place where container is freed of casing, whereupon spent fuel assemblies are kept in storage place. In the process spent fuel assemblies are first placed in container and then the latter is inserted in vertical position into split damping casing made in the form of removable drum with butt-end covering and base that functions as end lid of this drum. Charged container is installed on base, covered on top with removable drum, and the latter is fastened to base. Then split damping casing is secured to container, whereupon transport package is conveyed in transport position to storage place.
EFFECT: enhanced reliability of storage and transportation.
6 cl, 5 dwg
FIELD: nuclear engineering.
SUBSTANCE: proposed method includes loading spent fuel assemblies in metal-concrete container, conveying the latter to intermediate storage site, and holding it on storage sire. Shipping unit for conveying spent fuel assemblies to intermediate storage site has flat-car for carrying vertically mounted container holding spent fuel assemblies. Container is provided with external removable circular supporting member engageable with mating supporting surface of flat-car frame and means for locking container relative to mentioned frame. Shipping unit is provided with jacks for lifting the frame to load spent fuel assemblies in container. Side surface of container body has rigging members in the form of seats on its top and bottom ends. Bottom end of container is installed inside mentioned circular supporting member. Container locking means include radially disposed submersible adjustable stops.
EFFECT: enhanced reliability and safety of proposed method and device.
4 cl, 8 dwg
FIELD: storage and transportation of used nuclear fuel.
SUBSTANCE: metal-concrete container for transportation and/or storage of used assemblies of fuel elements of nuclear reactors has case with bottom, internal protection air-tight cap, edge damping members. Casing with central cell is inserted inside cavity of case. Peripheral cells are disposed around central cell for mounting housings with used assemblies of fuel elements. Peripheral cells are made in form of tubular members that are mounted to have spaces in relation to internal protection air-tight case and bottom of case. Casing has longitudinal rod members disposed around circle in relation to central cell of casing. Container has first and second sheet members which are mounted along height of case and are connected for disconnection by means of longitudinal rods. Edge damping members are made in form spring-shaped members and they are mounted onto internal protection air-tight cap each in opposite to corresponding cell of casing for interaction with housing under normal conditions of exploitation of metal-concrete container.
EFFECT: higher safety of handling of loaded container.
6 cl, 7 dwg
FIELD: storage and transportation of spent nuclear fuel.
SUBSTANCE: proposed metal-concrete container for transportation and/or storage of nuclear-reactor spent fuel assemblies has housing with bottom, internal pressurizing safety cover, hood inserted into housing and provided with cells to receive boxes with spent fuel assemblies. Container also has damping members engageable with cover on inner surface end, with housing bottom, and with housing internal wall. Hood is installed within housing in a space relation to housing internal wall. Side damping members are installed between the latter and hood. Each damping member is made in the form of longitudinal rod passed through holes in respective first and second sheet members installed throughout container height on internal wall of housing and on hood and disposed in parallel with housing bottom.
EFFECT: enhanced reliability of spent nuclear fuel storage.
6 cl, 5 dwg