RU196043U1 - FRAME OF NUCLEAR HOMOGENEOUS REACTOR - Google Patents

Abstract

The utility model relates to the frame of a nuclear homogeneous reactor. The device consists of supports with holes located at the corners, a steel frame in the upper part of which there are eyelets at the corners, and in the middle guides for the regulating bodies. Moreover, in the lower part there is a pallet with stampings uniformly located on its surface. Supports with holes protrude beyond the side surfaces of the frame at a distance more than two times the diameter of the holes. The pallet has stampings with a diameter of not more than a diameter and a depth of not more than 1/3 of the height of the bottom of the core of the core. The frame material is similar to the core material or has a coating resistant to decontamination solutions. The technical result is to increase radiation safety during installation and dismantling of a homogeneous solution reactor. 3 s.p. f-ly, 1 ill.

Description

Technical field

The utility model relates to the additional equipment of a nuclear homogeneous solution-type reactor designed to produce medical isotopes.

State of the art

The equipment of the mortar reactor for the production of medical radioisotopes determines the feasibility of using designs aimed at ensuring radiation safety during the decommissioning of this type of reactor.

A known design of a nuclear homogeneous reactor for the production of medical isotopes (patent for the invention of the Russian Federation 2624823), including a sealed core of the active zone containing the loading volume of the fuel solution, for example, uranyl sulfate involved in the Central body of the multi-vessel. The lower part of the central body, containing the active zone, is placed inside the caisson in a graphite masonry in the form of a parallelepiped serving as a reflector.

However, the installation process for the equipment of this complex multi-unit structure has not been described.

The technical problem to which the claimed utility model is aimed is to increase radiation safety during the commissioning and decommissioning of a homogeneous solution reactor.

Utility Model Disclosure

The technical result of the proposed utility model is to increase radiation safety during installation and dismantling of a homogeneous solution reactor

To achieve this technical result, a nuclear homogeneous reactor frame is proposed, consisting of supports with holes located in the corners, a steel frame in the upper part of which are made eyelets at the corners, and in the middle guides for regulatory bodies, while in the lower part there is a pallet with evenly spaced its surface is stamped.

In addition, supports with holes protrude beyond the side surfaces of the frame at a distance of more than two times the diameter of the holes.

In addition, the pallet has stampings with a diameter of not more than a diameter and a depth of not more than 1/3 of the height of the bottom of the core of the core.

In addition, the frame material is similar to the core material or has a coating resistant to decontamination solutions.

Brief Description of the Drawings

The figure shows a structural diagram of the frame of a nuclear homogeneous reactor, where:

1 - solution nuclear reactor;

2 - graphite reflector;

3 - guides for regulatory authorities;

4 - pallet;

5 - supports with holes;

6 - eyes;

7 - frame.

Utility Model Implementation

The proposed frame design is an integral part of a nuclear homogeneous solution type 1 reactor for producing medical isotopes and includes a steel core body with a loading volume of fuel solution (not shown in the figure) surrounded by graphite reflector 2 enclosed in a steel frame 7. In the lower part there is a pallet 4, and at the corners of the support with holes 5. In the upper part of the frame 7 there are eyes 6, and in the center there are rails for regulating bodies 3. The pallet 4 has evenly spaced stamping no more than a diameter and a depth of no more than 1/3 of the height of the bottom of the core of the core.

All metal parts are made of a material that is resistant to decontamination solutions, for example, steel grade 08X18H10T.

Guides for regulatory bodies 3, ensure alignment with the reactor vessel (not shown in the figure) with the required accuracy.

All structural components are welded at the factory or on the floor of the central hall of the operating organization, and then with the help of a crane and cables fixed to the eyes 6, are lowered into the canyon, with bolts pre-mounted on its bottom (not shown in the figure), the area of which the structure is larger by the size of the protruding supports 5. The structure is fastened to the bolts through the holes in the supports 5 from above by tightening the nuts with an elongated socket wrench without lowering the person into the canyon.

During the operation of the reactor, possible leaks of fuel, coolant and condensate are collected in the pallet 4. Punching does not allow critical mass to collect.

At the end of the operation of the reactor, the nuts are unscrewed, after which, using the eyes 6, the structure is lifted from the canyon by a crane and moved to a transport protective container for subsequent transportation to a specialized organization for disposal, which ensures radiation safety.

The advantages of the proposed design are:

1. Simple welded construction.

2. Using the eyes in the structure, it is possible to move the reactor installation with a crane.

3. Mounting / unfastening the installation in the floor is carried out from the floor of the central hall by tightening the nuts with an elongated socket wrench, without lowering the person into the canyon, which ensures a reduction in the radiation dose to personnel.

4. Possible leaks of fuel, coolant and condensate are collected in a pan, which excludes the exit of fission products outside the frame.

5. Punching in the pan does not allow the critical mass of nuclear fuel to accumulate, which eliminates the occurrence of a self-sustaining chain reaction.

Claims (4)

1. The frame of a nuclear homogeneous reactor, consisting of supports located at the corners with holes in the steel frame, in the upper part of which there are eyelets at the corners, and in the middle - guides for regulatory bodies, while at the bottom there is a pallet with stampings uniformly located on its surface . 2. The frame according to claim 1, characterized in that the supports with holes protrude beyond the side surfaces of the frame at a distance more than two times the diameter of the holes. 3. The frame according to claim 1, characterized in that the pallet has stampings with a diameter of not more than a diameter and a depth of not more than 1/3 of the height of the bottom of the core of the core. 4. The frame according to claim 1, characterized in that the frame material is similar to the core material of the core or has a coating resistant to decontamination solutions.

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