RU71803U1 - TRANSPORT PACKAGING KIT FOR TRANSPORTATION AND STORAGE OF RADIOACTIVE MATERIALS - Google Patents

Abstract

The utility model relates to nuclear energy, to devices for transporting and storing spent nuclear fuel in the form of nuclear and radiation hazardous bulk cargo, such as irradiated fuel uranium blocks of DAV of all types, and can be used for its transportation to reprocessing to produce fuel elements for nuclear power plants (AS).

The transport packaging set for transportation and storage contains a container body, inner and outer covers, a cover and dampers, the inner cavity of the cover is divided into at least two parts by a vertically mounted neutron trap in the form of a hollow separation wall, and the bottom of each part is made in the form of a shutter with the possibility of opening. The use of the utility model ensures nuclear and radiation safety of transportation and technological storage of radioactive bulk cargo and simplifies the carrying out of transport and technological operations for loading and unloading nuclear and radiation-hazardous bulk materials in TUKs. 1 n.p. f-ly, 1 Fig.

Description

The utility model relates to nuclear energy, to devices for transporting and storing radioactive materials in the form of nuclear and radiation-hazardous bulk cargo, such as irradiated fuel uranium blocks of all types of SAEs and can be used for its transportation to reprocessing.

For transportation and storage of radioactive materials transport packaging kits (TUK) are used.

In accordance with the norms and rules of nuclear and radiation safety and IAEA recommendations, TUKs for transporting and storing nuclear and radiation hazardous cargo must have high radiation protective and strength properties, including in emergency situations, since irradiated radioactive materials are a source of powerful ionizing radiation and nuclear hazardous fissile materials, the occurrence of an uncontrolled spontaneous chain reaction. Along with this, packaging kits created for the transportation and storage of radioactive materials should provide the ability to use existing infrastructure. The requirements for such devices determined the composition of the main elements included in transport packaging kits for transporting and storing radioactive materials, namely: a radiation-protective container case with a cavity, one or more lids with fixing elements, a cover for radioactive materials, and shock absorbers ( dampers).

A known container for transportation and long-term storage of radioactive materials in the form of spent fuel assemblies (SFA) according to patent RU 2148864, G21F 5/008, publ. 2000.05.10, comprising an outer casing with a cover, shock absorbers, an inner casing with a cover and with means for fastening with an outer casing, supported by shock absorbers rigidly fixed at the bottom of a horizontally located outer casing, provided with a cover with SFA sockets installed in the inner casing, the cover of the outer casing is located at its end, and its inner surface is equipped with rigidly fixed and evenly spaced shock absorbers, while at the bottom of the outer casing shock absorbers

are evenly spaced, and each shock absorber is composed of cups made in the form of hollow metal cylinders of different diameters, installed in each other with gaps in the direction of application of the load and rigidly connected to each other at the interface.

A device for transporting and (or) storing cargo according to the patent RU 2133061, G21F 5/00, publ. 1999.07.10 containing container and shock absorbers. A protective shell is introduced into the container, connected to it by an adapter, which ensures the safety of the load under normal operating conditions and deforms or collapses in emergency situations, the protective shell being made either in the form of a segment, and shock absorbers are located on one side between the container and the segment, and on the opposite side between the container and the cargo, or in the form of a capsule, and shock absorbers are located between the container and the capsule.

Known devices are designed for transporting and storing radioactive materials in the form of spent fuel assemblies, each of which is orderly placed in a case and spaced in it to prevent their destruction.

The closest in combination of features is a device for transporting and storing radioactive materials in the form of spent fuel assemblies according to patent RU 56704, G21F 5/008, publ. 2006.09.10, “Transport packaging for transportation and storage of spent fuel elements.” The known device comprises a container body of ductile iron with spherical graphite with lifting trunnions mounted on its side surface, an inner and an outer cover mounted on the housing with fastening and sealing means, and forming two airtightness barriers with the housing, a cover made in the form of channels forming a channel block for orderly placement of SFA and equipped with a central rack with a device for capturing, and wooden dampers.

A common disadvantage of the known devices is the complexity of the operation of loading spent nuclear fuel in the form of SFA, which requires accurate positioning of the cargo.

The proposed utility model is aimed at solving the problem of ensuring nuclear and radiation safety during transportation and storage of radioactive material.

When solving this problem, the utility model provides a technical result, which consists in simplifying the carrying out of transport and technological operations for loading and unloading radioactive materials in TUKs.

The specified technical result is achieved in that in a transport packaging set for transporting and storing radioactive materials, comprising a container body, inner and outer covers, a cover and dampers, the internal cavity of the cover is divided into at least two parts of a vertically installed hollow neutron trap dividing walls, and the bottom of each part is made in the form of a leaf with the possibility of opening.

The essence of the utility model is illustrated in the drawing. The figure shows a transport packaging set for transporting and storing radioactive materials. The TUK contains a container body 1, an inner lid 2 and an outer lid 3, a sheath 4, a neutron trap 5 in the form of a dividing wall, a shutter 6, dampers 7.

The container body 1 is molded together with the bottom from ductile iron with spherical graphite. In the upper part of the housing 1, an inner cover 2 and an outer cover 3 are installed with fastening means in the form of studs and seals, creating two sealing barriers. Inner cover 2 and outer cover 3 are made of stainless steel. On the side surface of the housing 1 mounted and reinforced lifting trunnions. A cover 4 is inserted inside the container body 1, designed to accommodate bulk radioactive cargo in the form of irradiated fuel uranium blocks DAV. Case 4 is a welded structure, the inner cavity of which is divided into two equal parts by a vertically mounted neutron trap 5 in the form of a hollow dividing wall and lined with sheets of boron steel. Through the center of the cover 4 passes the Central rack with a device for capture in the upper part. At the ends of the container body 1, wooden dampers 7, lined with stainless steel, are installed and pulled together.

Radioactive materials in the form of irradiated fuel uranium blocks ДАВ represent an aluminum cylindrical matrix with uranium filling. When loading, transporting, unloading and storing such blocks, it is necessary to exclude the possibility of the beginning of the SCR, which does not go with a certain estimated number of blocks. To prevent SCR, loading and (or) unloading of each part of the TUK cover is carried out alternately.

A utility model can be implemented as follows:

The completed TUK enters the premises for loading. Before loading, the dampers 7 are removed and the outer cover 3 and the inner cover 2 are sequentially removed and removed to the storage position. The container body 1 with the cover 4 is installed in the loading pool, the pool is filled with water and loading under water is carried out, providing radiation protection to personnel. The boot of the cover 4 with the blocks of DOW is carried out by separately sequentially filling each part of the loading capacity of the cover 4. In this case, the cavity filled with water of the separation wall of the neutron trap 5 prevents SCR. The unloading of the cover 4 is also carried out by sequentially opening the leaves 6. After loading, an inner cover 2 is installed on the housing 1 and the container cavity is dried. After controlling the sealing means 5 in the form of sealing rubber rings, the outer cover 3 is installed. Next, the container body 1 with the inner 2 and outer covers installed on it is removed from the pool, then dampers are installed and TUKs are transported to the temporary storage site. TUK transport and serve in an upright position.

The use of the utility model ensures nuclear and radiation safety of transportation and technological storage of radioactive bulk cargo and simplifies the carrying out of transport and technological operations for loading and unloading nuclear and radiation-hazardous materials in TUKs.

Claims (1)

A transport packaging set for transporting and storing radioactive materials, comprising a container body, an inner and an outer cover, a cover and dampers, characterized in that the cover is divided into at least two parts by a vertically mounted neutron trap in the form of a hollow dividing wall, and the bottom of each parts made in the form of a sash with the possibility of opening.