RU98844U1 - CONTAINER FOR DISPOSAL AND / OR TRANSPORTATION OF RADIOACTIVE WASTE - Google Patents

Abstract

 1. A container for burial and / or transportation of radioactive waste, comprising a housing formed by side walls and a bottom, provided with rigging assemblies and a lid mating with the upper end surface of the housing wall by means of fasteners including bolts and nuts concentrically located on the lid with the possibility of passage bolts through the mounting holes made in the sample cover, concentrically located relative to its center and equipped with a nozzle for supplying curing material inward case, characterized in that the container is equipped with a supply pipe of curing material, the outer end of which is made in the form of a fitting, and the lower end is located inside the case with the possibility of its interaction with the collector, made in the form of a system of perforated pipes uniformly located on the inner surface of the bottom of the container, bolts made monolithic in the upper end surface of the wall of the housing, and the sample is made in the form of a peripheral strip of the cover, equipped with stiffeners located in zmozhnostyu vzaimoukladyvaniya them a middle portion of the respective damping elements mounted on the outer bottom surface of container, during transportation. ! 2. The container according to claim 1, characterized in that the housing is made in the form of an octagonal prism with alternating narrow and wide faces. ! 3. The container according to claim 1 or 2, characterized in that the lifting units are each made in the form of eyes located on the narrow faces of the body and on the lid. ! 4. The container according to claim 1, characterized in that the stiffeners are symmetrically located along the perimeter

Description

The utility model relates to the field of atomic physics, namely to protective devices from radioactive radiation, mainly to metal (metal-concrete, reinforced concrete) containers intended for long-term storage and / or transportation of solid or solidified radioactive waste (RW), mainly of air-conditioned forms of RW of low level activity, nuclear power plants and special enterprises, as well as chemical and other industries and can be used in engineering structures and burials on top underground or underground burial grounds.

An analysis of the state of the art in this area showed that it is known to design a container used for preserving radioactive waste containing a body formed by side walls and a bottom, equipped with a lid made with a hardener material supply fitting into the body and configured to interlock a protrusion mounted on the bottom of the body on the lid during transportation (Japan Patent No. 4-58599 B4, IPC: G21F 9/36, publ. RZH ISM No. 06 for 1994)

The inability to achieve a technical result provided by the claimed device is caused by the fact that the analog container is structurally complicated due to the presence of a shielding container and an additional container in it, which leads to the need to preserve the container cavity with radioactive waste in two stages, which lengthens the curing process. In addition, filling is performed from above, which affects the appearance of discontinuities in the hardener, leading to a decrease in the quality of curing and the deterioration of the radioactive protection of the container. During transportation, the existing protrusion on the bottom is not stable enough and is not a damper, which also reduces the possibility of ensuring safety in case of accidental impact of the container.

A well-known container described in the method of manufacturing a container for transportation and / or storage of spent nuclear fuel, comprising a housing formed by side walls and a bottom, equipped with rigging assemblies and a lid, fittings for supplying curing material to the inside of the housing, made in the form of feed pipelines (Patent for the invention of the Russian Federation No. 2088984 IPC: G21F 5/008, publ. Bull. No. 24 dated 08/27/97).

The inability to achieve the technical result achieved by the claimed device is due to the fact that the analog container is structurally complicated, as it is made with many supply pipelines for supplying the curing material in order to ensure its uniform laying, and also requires additional cash and operating costs for the need to turn it upside down during injection curing material to eliminate discontinuities, which leads to its rather high price.

A container device for storing hazardous material is known, comprising a housing formed by side walls and a bottom, provided with rigging assemblies and a lid that mates with the upper end surface of the housing wall by means of fasteners, and equipped with a hardener material supply fitting into the inside of the housing with a supply pipe installed therein, mounted along the vertical generatrix of the side wall of the housing, the outer end of which is installed in the fitting, and the lower end is located near the bottom of the chambers housing (patent RF №2383071 C2, IPC: G21F 5/005, publ №6 from 27.02.1010 Bul g..).

The inability to achieve a technical result provided by the claimed device is caused by the fact that the analogue design is made in the form of a subcontainer, due to which, although radiation protection was increased, however, this also necessitated the presence of a plurality of supply pipelines for each casing because of the advisability of uniformly introducing a hardener into cavity of containers as well as the presence of several supporting parts. Thus, the specified container is made structurally complex enough, which increases its cost. In addition, the specified container is not suitable for transportation or stacking, which, according to the standards adopted in nuclear energy, is a necessary special condition for the operation of containers with radioactive material during storage.

Of the known devices, the closest to the claimed one is a container for the disposal of radioactive waste, comprising a housing formed by side walls and a bottom, provided with rigging assemblies and a cover mating with the upper end surface of the housing wall by means of fasteners including bolts and nuts concentrically located on the cover with the possibility of bolts passing through the mounting holes made in the sample cover, concentrically located relative to its center, and equipped with a fitting for Achi curing material in the interior of the housing (utility model patent of the Russian Federation №87036, IPC: G21F 9/30, publ 20.09.2009 g.).

The inability to achieve the technical result achieved by the claimed device is caused by the fact that the curing mass enters the container through the nozzle from above and, therefore, air jamming in the lower part of the housing where the radioactive waste is not excluded, and therefore the formation of voids, which will subsequently lead to insufficient operational reliability of the container.

In addition, the design of the prototype container does not provide for the possibility of its safety during transportation in packages by stacking containers on top of each other and possible fall, which will also lead to low operational reliability.

And finally, with the aforementioned drop, a breakdown of the fasteners is possible, which will also affect the lack of operational reliability.

In the aggregate of the indicated drawbacks of the prototype design, low operational reliability will lead to a mismatch of the requirements of the standards for protection against radiation safety, and, therefore, to the protection of the ecological environment.

The task to which the claimed utility model is directed is to increase the environmental safety of the container during storage and / or transportation.

In solving this problem, a technical result was achieved, which was to increase the radiation protection of the container by developing a design that eliminated the presence of discontinuities in the curing material by feeding it from below, evenly distributing throughout the entire volume of the container, and introducing safety elements to prevent ingress into the structure radiation into the environment in the event of a container falling during storage and / or transportation of the container.

The essence of the claimed utility model lies in the fact that the container for burial and / or transportation of radioactive waste contains a housing formed by side walls and a bottom, provided with rigging assemblies and a lid that mates with the upper end surface of the housing wall by means of fasteners, including bolts and nuts, concentrically located on the cover with the possibility of bolts passing through the mounting holes made in the sample cover, concentrically located relative to its center, and provided fitting curing constant feed material into the interior of the housing.

New in the design of the container is that the container is equipped with a supply pipe of curing material, the outer end of which is made in the form of a fitting, and the lower end is located inside the body with the possibility of its interaction with the collector, made in the form of a system of perforated pipes uniformly located on the inner surface of the bottom of the container , the bolts are made monolithic in the upper end surface of the housing wall, and the sample is made in the form of a peripheral strip of the cover equipped with stiffeners, ra arranged with the possibility of interlocking on them the middle part of the corresponding damping elements mounted on the outer surface of the bottom of the container during transportation.

In addition to the fact that the body can be made in the form of an octagonal prism with alternating narrow and wide faces, the rigging units can each be made in the form of eyes located on the narrow faces of the body and on the lid.

Stiffening ribs can be symmetrically located around the perimeter of the cover lid, on the front of which a fitting with the outer end of the supply pipe can be mounted, and the container can be equipped with a pipe for installing a level sensor and a device for air outflow.

The walls of the container can be rigidly connected to the corners, the upper end surface of the body can be made in the form of a pipe of rectangular cross section with holes in the upper part, and the possibility of monolithic bolts into it is carried out by passing the bolts through the holes and sealing them to the bottom of the pipe.

Bolts can be made in the form of threaded pins, the housing walls can be made of concrete or reinforced concrete.

The perforated pipe system can be made in the form of a central pipe connected to the lower end of the supply pipe and made with at least two side pipes located perpendicular to it and parallel to each other.

The height of the stiffeners can be equal to or slightly greater than the height of the side wall of the cover.

The container device is shown in the drawings, which depicts:

Figure 1 - General view of the device;

Figure 2 is a transverse view of the device;

Figure 3 is a top view of the device;

Figure 4 - section aa in figure 1;

Figure 5 is a section bb in figure 1 on an enlarged scale;

6 is a section CC in FIG. 1 along the hardener feed pipe on an enlarged scale;

7 is a bottom view of the device.

The container for storing and / or transporting radioactive waste contains a housing 1 (Figure 1), formed by side walls made in the form of an outer shell 2 with the formation of an internal cavity 3 and a bottom 4. The housing can be made in the form, for example, of an octagonal prism with alternating narrow and wide side faces. The shells can be made, for example, metal, or the walls of the housing can be made of concrete, reinforced concrete, etc. Inside the cavity there are corners 5 (FIGS. 2 and 4) along the length of the walls, rigidly welded to them and intended to give the structure rigidity and strength, especially when installing the container in a stack and transporting it. On top of the container is closed by a removable lid 6, made in the form of a casing, hermetically connected to it and mating with its lower flat surface 7 (Figure 2) with a flat upper end surface 8 of the casing, made preferably in the form of a pipe of rectangular cross section broken in shape of the casing, by means of fasteners elements 9 (Figure 3). A pipe 8 of rectangular cross-section is made with holes in the upper part, and the possibility of monoling the fasteners 9 into it is carried out by passing them through these holes and hermetically welding them to the lower part of the pipe.

If the walls are made with concrete or reinforced concrete pipes 8 are absent, and the lid is in direct contact with the upper end surface of the concrete wall into which the bolts are mounted. The lid is made with a sample 10 concentrically located relative to the center of the lid, through which passes the axis 11 of the lid, coinciding with the vertical axis of the housing. The selection is made in the form of a peripheral strip of the cover, on which there are mounting holes 12 for fasteners 9, including bolts 13, made in the form of threaded pins that are hermetically fastened in the upper end surface 8 of the housing wall by welding them into it, and symmetrically as well concentrically located along its perimeter and relative to the center of the cover, as well as nuts 14, reciprocally located on the pins. A sample of the lid 10 is made with stiffeners 15 symmetrically located respectively on the side 16 (Figure 3), angular 17, rear 18 and front parts of the sample 10 of the lid, for installing containers on top of each other during transportation. On the front of the lid is located, made in the form of a nozzle for supplying the curing material into the inside of the housing, the outer end 19 (Fig.6) of the supply pipe 20 passing in the cavity 3 along the vertical generatrix of the wall of the housing with the possibility of its interaction with the lower end 21 (Fig.4) through, for example, a transition fitting (not shown in the drawing), with a collector 22 made in the form of a system of perforated pipes 23, uniformly located on the inner surface of the bottom 24 and mounted relative to each other from the condition of uniform filling the interior of the container with curing material. For example, the inventive system of perforated pipes 23 is made in the form of a central perforated pipe connected to the lower end of the supply pipe and made with at least two side perforated pipes located perpendicular to it and parallel to each other. Each hole 25 of the side pipes and the central pipe is closed by a grid (not shown in the drawing), and is fixed by a clamp 26.

On the narrow faces of the body are the rigging units 27, each made in the form of eyes used to transport the container.

Supporting damping devices are made on the lower surface of the bottom of the body in the form of projections 28 of rectangular cross-section, located along the peripheral contour of the bottom of the body, adjacent to the corresponding side faces of the body and designed to absorb shock when the container suddenly falls. The height "h" of the ribs 15 (Fig.6) should be equal to or slightly larger. the height "a" of the side wall 29 (Fig. 5) of the cover 6. The distance between the ribs 15 "S" (Fig. 3) corresponds to the distance "L" (Fig. 1) between the midpoints of the corresponding protrusions 28, laid with their midpoints on the corresponding ribs on lateral 16, angular 17 and front parts of the lid when transporting containers or stacking them. The protrusions are made of, for example, energy-intensive metal with openings between them for serving the container with a forklift.

A pocket 30 for documents is mounted on the side wall of the container.

On the side wall 29 of the lid of the container mounted device for the outflow of air from the container in the process of filling the inner chamber of the container with curing material, made in the form of an opening with a plug 31.

In the container, a nozzle 32 is installed in which a level sensor is installed, signaling the end of the filling of the internal cavity of the container.

In the lower part of the body there are pipes 33 (Fig. 2), made similar to the pipe 8, attached to the bottom of the container with ties 34, and mounted from the corners and giving rigidity to the bottom of the container.

The installation of the container is as follows.

The container is assembled in the factory.

Set the container body 1 with a metal wall thickness of 5 mm and a bottom thickness of 8 mm with the cover 6 removed on the damping elements 28 welded to it. A feed pipe is installed through the nozzle into the container by the end 19, the lower end of which 21 is connected by a fitting to the central pipe of the manifold 22, to which lateral perforated pipes were previously connected. The corners 5 are welded, the pipe 8 is broken from the parts welded to each other in the case of using metal side walls. A cover 6 is mounted by a lifting mechanism on the housing 1. Installation is carried out so that the bolts 13 pass through the mounting holes 12 of the concentric sample 10, and the outer end 19 of the supply pipe 20 enters the fitting on the cover, which is closed by a plug, put the corresponding washers on the bolts 13 and screw on nuts 14 on them. To ensure safety, it is possible to connect the housing to the cover by means of a bolted connection with the installation of an additional sealing gasket between them (not shown in the drawing). Hoisting operations are carried out using forklifts or other lifting gear. The lifting container grabs the assembled container by the eyes of the lifting units 27 mounted on the beveled edges, and the finished container is transported to the place of filling of its radioactive waste. Rigging units are also mounted on the lid.

The operation of the device is as follows.

The lifting mechanism removes the lid, fills the cavity of the container with curable radioactive waste and reinserts the lid on the housing as described above.

The distributor hoses are brought to the fitting, curing material with highly penetrating cement is poured, for example, self-hardening concrete, which, passing through the pipe 20, enters the perforated pipes 23 and from them through the openings 25 into the container’s inner chamber, uniformly spreading first along the bottom of the chamber, and then rising upward, self-sealing and eliminating the appearance of air voids. Excess air is vented through the opening with a plug 31. At the same time, the level of the rising mass is periodically monitored by means of a level sensor 32, which also signals the end of the filling of the container’s internal space. After filling, the outer end of the supply pipe is closed with a plug.

If it is necessary to transport these containers to the burial place or to stack them when stored at the indicated place, the protrusions 28 of each container placed on top of the container, which is installed by means of a lifting mechanism (not shown in the drawing) on the lower container, are adjusted to the appropriate position by interlocking the protrusions and ribs. This is done in such a way that the protrusions 28 with their middle part are each mounted on the corresponding stiffener 15 of the peripheral sample 10. Moreover, if the heights “h” and “a” are equal, the protrusion of its part remote from the edge of the wall will also lie on the top surface of the cover to secure the position .

The possibility of implementing the inventive container is confirmed by the use of known means and non-deficient materials, including those presented at the level of functional generalization used in the field of nuclear engineering, and with the achievement of the technical result, which consists in increasing the radioactive safety of the container by eliminating air voids, which are low-density zones that allow radiation due to the introduction of structures into the container, allowing to inject the curing material evenly from below, as well as by creating special conditions for the use of a container with radioactive waste in accordance with the regulatory safety requirements for nuclear energy, by safely laying containers on top of each other by interlocking the damping protrusions of the bottom and edges of the lid, as well as locking the bolts and their location, preventing them from breaking if dropped containers during transportation and / or stacking during storage.

Claims (11)

1. A container for burial and / or transportation of radioactive waste, comprising a housing formed by side walls and a bottom, provided with rigging assemblies and a lid mating with the upper end surface of the housing wall by means of fasteners including bolts and nuts concentrically located on the lid with the possibility of passage bolts through the mounting holes made in the sample cover, concentrically located relative to its center and equipped with a nozzle for supplying curing material inward case, characterized in that the container is equipped with a supply pipe of curing material, the outer end of which is made in the form of a fitting, and the lower end is located inside the case with the possibility of its interaction with the collector, made in the form of a system of perforated pipes uniformly located on the inner surface of the bottom of the container, bolts made monolithic in the upper end surface of the wall of the housing, and the sample is made in the form of a peripheral strip of the cover, equipped with stiffeners located in zmozhnostyu vzaimoukladyvaniya them a middle portion of the respective damping elements mounted on the outer bottom surface of container, during transportation. 2. The container according to claim 1, characterized in that the casing is made in the form of an octagonal prism with alternating narrow and wide faces. 3. The container according to claim 1 or 2, characterized in that the lifting units are each made in the form of eyes located on the narrow faces of the body and on the lid. 4. The container according to claim 1, characterized in that the stiffeners are symmetrically located around the perimeter of the lid sample, on the front of which a fitting is mounted with the outer end of the supply pipe. 5. The container according to claim 1, characterized in that the container is equipped with a pipe for installing a level sensor and a device for the expiration of air. 6. The container according to claim 1, characterized in that the walls of the container are rigidly connected to the corners. 7. The container according to claim 1, characterized in that the upper end surface of the housing is made in the form of a pipe of rectangular cross section with holes in the upper part, and the possibility of monolithic bolts into it is carried out by passing the bolts through the holes and hermetically welding them to the bottom of the pipe. 8. The container according to claim 1, characterized in that the bolts are made in the form of pins with a thread. 9. The container according to claim 1, characterized in that the walls of the housing are made of concrete or reinforced concrete. 10. The container according to claim 1, characterized in that the system of perforated pipes is made in the form of a central pipe connected to the lower end of the supply pipe and made with at least two side pipes located perpendicular to it and parallel to each other. 11. The container according to claim 1, characterized in that the height of the ribs is equal to or slightly greater than the height of the side wall of the lid.