UA65790A - Container for transporting and storing spent fuel assemblies - Google Patents

Abstract

The proposed container for transporting and storing spent fuel assemblies contains a casing, an outside shell, a protecting cover, and trunnions. The gap between the casing and the shell is filled with material that absorbs neutrons. In the conic cavity of each trunnion, a labyrinth seal is provided, that is made of material absorbing neutrons.

Description

The invention relates to the field of nuclear energy and can be used for transportation and preservation of spent heat-releasing assemblies.

A well-known container for transportation and storage of used heat-dissipating assemblies, containing a body, an outer casing, a protective cover, load-bearing elements fixed on the outer casing (MTI -2,

ERGABK5 EOSHTSI RMET, IZBIOE 2 OCTOBER 1978).

Such containers reliably protect against the leakage of products released by spent heat-emitting assemblies. However, the installation of load-bearing elements on the casing of the container necessitates, with an increase in the carrying capacity of the container, a constructive increase in the thickness of the casing in the places of their attachment, and to avoid this, the trunnions are installed in the casing.

The closest thing to the claimed device is a container for transporting and storing spent heat-emitting assemblies, which contains a case, an outer casing filled with a neutron-absorbing element, a protective cover, load-bearing elements (pins) installed in the wall of the container body (see Fig.

Containers for transportation of spent heat-emitting elements, NPP: Proceedings of the TsKTI / Under the editorship.

Andreeva, P.A. etc. - L., 1977. - issue 142, pp. 20-21; and also see TK-10, produced by JSC "AZOVMASH" m.

Mariupol, black 2940.00.000; Means of transportation of spent fuel, NPP: Handbook-catalogue. - M., 1981. - prototype).

The disadvantage of this design is the lack of neutron-absorbing insulation in the places where the load-lifting elements are attached, which creates a radiation zone of heat-emitting elements that is dangerous for human life.

The task facing the authors is to create a container design with increased security of container maintenance.

The task is solved by the fact that in the container for transportation and storage of heat-emitting finished assemblies, which contains a body, an outer casing, a neutron-absorbing element located between them, a protective cover, load-lifting elements (pins), fixed on the body, it is supplied with an additional labyrinth neutron-absorbing element located in conical cavity made in the trunnion.

According to the applicant, such a constructive implementation of the container for transportation and preservation of spent heat emitters in elements allows solving the task set by the authors.

The described construction is explained by drawings.

Figure 1 shows the general view of the container;

In Fig. 2, the remote element A in Fig. 1.

A container for transporting and storing heat-emitting finished assemblies, containing a body 1, a casing 2, a neutron-absorbing element 3 located between them, a protective cover 4, load-lifting elements (pins) 5. So, the all-metal body of the pin is permeable to neutron radiation, from the inside the trunnion has a conical cavity in which a labyrinth neutron-absorbing element 6 is installed (for example, on the thread).

The presence of many faces (for example, carving) along the contour of the junction of neutron protection and the conical cavity 7 allows you to disperse the directed flow of radiation in this labyrinth, preventing it from escaping into the atmosphere and ensuring the safety of service personnel and the environment. l 5. 3 tu - That You i i i i | and

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Claims (2)

1. A container for transporting and storing spent heat-emitting assemblies, containing a body, an outer casing, a neutron-absorbing element located between them, a protective cover, pins fixed on the body, which is distinguished by the fact that it is equipped with an additional labyrinthine neutron-absorbing element located in a conical cavity, made in a trunnion. 2. The container according to claim 1, which differs in that the surfaces of the connection of the conical cavity with the neutron absorbing element are made of polygons. C. The container according to claims 1, 2, which differs in that the surfaces of the connection of the conical cavity with the neutron absorbing element are made of cutting surfaces.