RU92565U1 - DEVICE FOR REMOVING A CONTAINER ASSEMBLY WITH IRRADIATED BODY WITNESS SAMPLES FROM THE HOUSING OF THE NUCLEAR REACTOR - Google Patents

Abstract

1. A device for removing from a nuclear reactor vessel a container assembly with irradiated witness samples of a vessel steel, containing a movement mechanism, a fastening unit and a vertically mounted support bar, characterized in that the device includes a service platform mounted on the flange of the main connector of the reactor vessel, the support of the movement mechanism located on the service platform, the cutting head rigidly fixed at the lower end of the support bar, and a collection of cutting waste connected to the cutting head, while the movement mechanism consists of a body mounted on a support with the possibility of rotation about the vertical axis of symmetry of the support and fixing in a given position, a carriage located in the housing with the possibility of its movement up and down, and installed inside the carriage of the console with the possibility of its movement in the horizontal direction, and the end of the console through the attachment unit is rigidly fastened to the upper end of the support bar. ! 2. The device according to claim 1, characterized in that it is equipped with a television monitoring and control system. ! 3. The device according to claim 1, characterized in that the support of the movement mechanism is installed on the service platform axially relative to the central axis of the reactor vessel. ! 4. The device according to claim 1, characterized in that the cutting head is equipped with a cassette and a cutting electrode mounted in the cassette with the possibility of extension. ! 5. The device according to claim 1, characterized in that the cutting head is equipped with a mechanism for cleaning the cutting surface. ! 6. The device according to claim 1, characterized in that the movement mechanism is provided with a device for collecting cutting waste.

Description

Technical field

The utility model relates to nuclear energy, namely, devices for servicing, manipulating, or facilitating the manipulation of structural elements inside a reactor, for example, inside a high pressure vessel, in particular, for removing and transporting a container assembly with irradiated witness samples installed in the reactor vessel.

State of the art

A device for extracting and transporting fuel assemblies is known (RU 77092 U1, 10/10/2008).

A device is known for overloading a capsule with spent nuclear fuel (RU 2066488 C1, 09/10/1996).

A device for inserting and removing a cassette of a reactor containing a vertical rod (RU 33828 U1, 10.11.2003). However, such a device design is intended only for lifting the container assembly from the reactor vessel.

Also known is a device (prototype) for extracting from the reactor vessel a container assembly containing a vertical rod with a mount and a moving mechanism (RU 2094862 C1, 10.27.1997).

In the technical solution according to patent RU 2094862, a lifting crane is used as a means (mechanism) of movement, on the hook of which a vertical rod is fixed through an earring. However, this design of the device is not suitable for complex manipulations inside the reactor vessel, since it cannot absorb radial loads.

Utility Model Disclosure

The objective of the utility model was to develop a reliable device for removing a container assembly from the reactor vessel with irradiated witness samples (operational control samples) of vessel steel installed in “pockets” on the inner wall of the reactor vessel in the region of the core located in the lower part of the reactor. At the same time, the working elements of the device, namely, the vertically located supporting rod and the moving mechanism, must withstand large loads in the radial direction, along with vertical axial loads, in order to prevent damage to the walls of the reactor and samples during the planned separation and removal operations container assembly welded to the reactor vessel, with witnesses in it. In addition, the device should provide protection to the personnel from ionizing radiation during work related to the removal of the container assembly from the reactor vessel.

Thus, the technical result is to increase the reliability of the device when performing work while ensuring radiation safety.

The specified technical result is achieved by the fact that the device for removing from the reactor vessel a container assembly with irradiated witness samples of case steel, comprising a moving mechanism, a fastener and a vertically mounted support rod, according to a utility model, includes a service platform mounted on the flange of the main connector reactor vessel, a support of the displacement mechanism, a cutting head, rigidly fixed at the lower end of the support rod, and the collection Cutting rows attached to the cutterhead. In this case, the movement mechanism consists of a housing mounted on a support with the possibility of its rotation relative to the vertical axis of symmetry of the support and fixing in a predetermined position, a carriage located in the housing with the ability to move it up and down, and mounted inside the console carriage with the ability to move it in horizontal direction. The end of the console through the mount is rigidly bonded to the upper end of the support rod.

In addition, to ensure the possibility of remote execution of work and monitoring their implementation, the device is equipped with a television monitoring and control system.

It is advisable that the support of the movement mechanism was installed on the service site axially relative to the central axis of the reactor vessel.

It is recommended that for a contact electric arc of the container assembly, the cutting head is provided with a cartridge and a cutting electrode mounted in the cartridge with the possibility of extension.

It is envisaged that the cutting head may be provided with a mechanism for cleaning the cut surface remaining in the reactor vessel.

It is also provided that a device for collecting cutting waste that has fallen into a pocket on the reactor vessel and on the bottom and elements of the vessel can be installed on the transfer mechanism in order to ensure safe operation of the nuclear reactor.

Brief Description of the Drawings

The drawing shows a General view of a device for removing from the reactor vessel a container assembly with irradiated samples-witnesses of vessel steel.

Utility Model Implementation

The device is designed to extract from the reactor vessel (1) a container assembly (2) with irradiated samples-witnesses of vessel steel. Container assemblies are located in the reactor vessel in the core region. Each container assembly is inserted along the guides into a pocket “nest” welded to the inner surface of the reactor vessel. The assembly is fixed by a weld to the lid, which is the outer surface of the pocket. The device comprises a movement mechanism (3), a mounting unit (4) and a vertically mounted support rod (5). The device also includes a service platform (6) mounted on the flange of the main connector of the reactor vessel (1), a support (7) of the movement mechanism located on the service site, a cutting head (8), rigidly fixed to the lower end of the support rod (5), and a collection of waste arising from the cutting process attached to the cutting head. The movement mechanism (3) consists of a housing (9) mounted on a support (7) with the possibility of its rotation relative to the vertical axis of symmetry of the support and fixing in a predetermined position, a carriage (10) placed in the housing with the possibility of its movement up and down, and mounted inside the carriage of the console (11) with the possibility of its movement in the horizontal direction. The end of the console through the mount (4) is rigidly fastened to the upper end of the support rod (5). To ensure the possibility of remote execution of work and monitoring their implementation, the device is equipped with a television monitoring and control system. For a contact electric arc segment of the container assembly, the cutting head (8) is equipped with a cartridge and a cutting electrode mounted in the cartridge with the possibility of extension. In addition, it is provided that the cutting head can be equipped with a mechanism for cleaning the surface of the cut remaining in the reactor vessel. It is also envisaged that a device for collecting cutting waste that has fallen into a pocket on the reactor vessel and on the bottom, and housing elements, with the aim of ensuring safe operation of a nuclear reactor, can be installed on the transfer mechanism. It is recommended that the support (7) of the movement mechanism be installed at the service site axially relative to the central axis of the reactor vessel (1).

The device operates as follows. A service platform is installed on the main connector of the reactor vessel, on which a moving mechanism is mounted along the central axis of the reactor vessel. A support bar with a fixed cutting head and a device for collecting waste during cutting is vertically mounted on the movement mechanism in the opening of the service platform. The cutting head is guided and fixed on the "nest" with a witness sample. Then, a container assembly is removed from the “nest” (reactor vessel) and removed. The process of pointing, securing to a “nest”, cutting and cleaning the surface edge after cutting is based on the use of remote electrical contact cutting in combination with remotely controlled equipment with television monitoring and control. When carrying out work on the extraction of witness samples for research, two container assemblies are sequentially extracted. All work operations are carried out under a coolant layer.

Thus, the technical result, which consists in increasing the reliability of the device, is ensured by a combination of structural elements that are interconnected with each other and are given in the independent claim of the utility model formula.

Claims (6)

1. A device for extracting from the nuclear reactor vessel a container assembly with irradiated witness samples of vessel steel, comprising a moving mechanism, a fastener and a vertically mounted support rod, characterized in that the device includes a service platform mounted on a flange of the main connector of the reactor vessel, placed on the service platform support of the movement mechanism, the cutting head, rigidly fixed to the lower end of the support rod, and a collection of cutting waste attached to the cutting the head, while the movement mechanism consists of a housing mounted on a support with the possibility of rotation relative to the vertical axis of symmetry of the support and fixing in a predetermined position, a carriage located in the housing with the possibility of its movement up and down, and mounted inside the console carriage with the possibility of its movement in the horizontal direction, and the end of the console through the mount is rigidly fastened to the upper end of the support rod. 2. The device according to claim 1, characterized in that it is equipped with a television monitoring and control system. 3. The device according to claim 1, characterized in that the support of the displacement mechanism is installed on the service site axially relative to the central axis of the reactor vessel. 4. The device according to claim 1, characterized in that the cutting head is equipped with a cartridge and a cutting electrode mounted in the cartridge with the possibility of extension. 5. The device according to claim 1, characterized in that the cutting head is equipped with a mechanism for cleaning the surface of the cut. 6. The device according to claim 1, characterized in that the movement mechanism is provided with a cutting waste collection device.