RU183181U1 - A device for extracting spent assemblies of intra-reactor detectors - Google Patents

Abstract

Declared as a useful model, a device for extracting spent assemblies of internal reactor detectors (SVRD) relates to nuclear engineering, in particular to devices for facilitating the manipulation of materials inside reactors, and can be used for overloading the flexible elements of the control system of a nuclear reactor.

The device for extracting spent SVRD comprises a thick-walled cylindrical body equipped with a cover with a monitoring system, in the cavity of which there is a refueling mechanism, a gate, a catcher, a guide rod, a winder, including an electric drive core. An improvement of the design is the provision of the guide rod with an electric drive pivotally connected to it by a lever, and the connection of the core and guide rod electric drives to the remote control post, as well as the execution of the rotary cover with the possibility of fixing it in several positions, and the monitoring system is represented by cavities closed in the rotary cover safety glasses installed below. Television cameras connected to a special television system are located in the cavities of the rotary cover. This provides remote control of the processes of refueling, winding, filling the storage cavity with SVRD riots, dumping the SVRD riots in the RAW container and monitoring them, provides ease of use and reduces the time spent by staff near the radiation source. 2 of FIG.

Description

Declared as a useful model, a device for extracting spent assemblies of internal reactor detectors (SVRD) relates to nuclear engineering, in particular to devices for facilitating the manipulation of materials inside reactors, and can be used for overloading the flexible elements of the control system of a nuclear reactor.

A device for extracting channels for measuring internal reactor control (KIVRK) is known, equipped with a capsule for placing radioactive measuring channels, a closing mechanism, a winding mechanism, a refueling mechanism, a pressure disk unit and a gate. (Application for invention No. 93026885, class G21C 17/00, published on July 20, 1995). The recoverable element is fed into the channel and wound using a shaft rotated by the drive. After winding the coil of the recovered KIVRK, by rotating the flywheel it is shifted into the capsule by the thickness of the wound element. The front side of the capsule becomes its bottom, and the lid mounted on the closing mechanism becomes the capsule lid.

The disadvantage of the KIVRK extraction device is the low level of radiation safety of personnel when working with radioactive waste (RW), because the device is serviced manually directly near the radiation source.

A device is also known for the removal and transportation of channels for measuring the internal reactor control of a nuclear reactor. (GDR patent No. 134320 according to class G21F 5/00, published on 02.21.1979). The device comprises a housing in which there is a cavity for the accumulation of coiled riots, closed on all sides by protective walls. The winding KIVRK, which is fed through a special hole, is carried out manually using a drive mounted on the housing. The discharge of coiled riots is carried out in a container for radioactive waste through the hatch.

The disadvantages of this device are the inability to monitor the processes occurring inside the device and the low level of radiation safety of personnel when working with radioactive waste, because KIVRK is wound manually using a mechanical drive near the radiation source.

The closest technical solution to the claimed as a utility model device for extracting spent SVRD is a device for outputting a flexible long element of the control system of a nuclear reactor, which is a thick-walled cylindrical body, in the upper part of which there is a lid with a surveillance system in the form of a viewing window that allows you to conduct monitoring processes inside the device. (Description of the invention to the copyright certificate SU 1269423 according to class B65H 19/22, G21F 5/00, publ. 07.10.1990). A refueling mechanism, a winding mechanism, which contains a core with an electric drive, a guide rod with a manual drive, a gate, on the cylindrical part of which there is a chamber for receiving a discharge bay, are placed inside the case. The gate is installed so that the hole for dumping the coiled reloaded element into the radioactive waste container and the chamber are aligned with each other.

The disadvantage of this device is the long time that personnel is near the radiation source, because operations are performed manually and observation is carried out through the viewing window, and therefore personnel may be exposed to radiation from the radiation source inside the device.

The task of improving the claimed as a useful model of the device for extracting spent assemblies of in-reactor detectors is to reduce the time spent by personnel near the radiation source and to improve the ease of use.

The technical result of the improvement of the claimed as a utility model of a device for extracting spent ramjet is to increase personnel safety.

The specified technical result is achieved by the fact that in the device for extracting spent SVRD containing a thick-walled cylindrical body equipped with a cover with a monitoring system, in the cavity of which there is a refueling mechanism, a gate, a catcher, a guide rod, a winder, including an electric core, according to a utility model, the guide rod is equipped with an electric drive and a lever pivotally connected to it and the electric drive, and the core and guide rod electric drives are connected to the dist post control lid, and the lid is rotatable with the possibility of fixing it in several positions, and the monitoring system is represented by cavities made in the rotatable lid, closed with protective glasses installed from below, and television cameras electrically connected to the television system are fixed in the cavities of the rotary lid.

The supply of the guide rod with an electric drive and the connection of electric drives to the remote control station provides the possibility of remote control of laying during winding of spent SVRD, which increases the usability of the device and removes personnel from the irradiation zone, i.e. provides radiation safety of personnel.

The implementation of the lid with the cavities into which the television cameras are installed to monitor the process of refueling, winding and resetting on the television system monitor provides the ability to remove personnel from the radiation exposure zone and increases the ease of use. The presence of television cameras in the rotary cover and the ability to change the position of the cover allows you to quickly control the operation of the internal mechanisms of the device and even switch from one television camera to another in case of disruption of one of them, without interrupting the operation of the device.

An example implementation of the inventive device is illustrated by sketches.

In FIG. 1 shows a design of a device for extracting an SVRD, section.

In FIG. 2 shows a pivoting lid with television cameras (view A in FIG. 1).

The device includes a housing 1, which is a thick-walled cylinder and a rotary cover 2, which is mounted on a sliding bearing 3 on the upper end surface of the housing 1. In the rotary cover 2, cavities 4 and 5 are made, in which television cameras 6 and 7, respectively, connected via an electric cable 8 to a television system 9 provided with a monitor 10. On the upper part of the thick-walled housing 1, grooves 11 are provided for fixing the rotary cover 2 with a latch 12, otorrhea mounted on the handle 13. The latch 12 is carried by control lever 14 which is pivotally connected to the rod 15 and provided with a spring 16. The front of the lens 6 and television camera 7, attached in the cavities 4 and 5, the rotary cover 2 below the protective glass 17 is installed.

The winding device 18 and the guide rod 19 located inside the housing 1 are provided with electric drives 20 and 21, respectively, which are mounted on the housing 1. The electric drives 20 and 21 are connected to the remote control station 22. The electric drive 20 is connected to the core 23 of the winding device 18 and provides its rotation or reciprocating movement. The actuator 21 is pivotally connected to the guide rod 19 through the lever 24 and ensures its reciprocating movement. Under the refueling and winding mechanisms, there is an accumulation cavity 25 for coiled URD riots.

In the lower part of the housing 1 there is a catcher 26, designed to keep the SVRD from falling out of the device in the event of a break or during refueling. Above the catcher 26 is the refueling mechanism 27, which ensures the supply of the SVRD to the slot of the core 23 during refueling.

The gate 28 is a thick-walled plate with rolling bearings and is made with the possibility of reciprocating movement in the cavity of the housing 1. The gate 28 is designed to discharge the riots of the internal air defense system from the accumulation cavity 24 into the RAW container (not shown in the sketches).

The device operates as follows.

Before refueling the SVRD into the device, the core 23 is mounted above the refueling mechanism 27 using the electric drive 20. The guide rod 19 is also installed above the refueling mechanism 27 by the electric drive 21. By means of a catcher 25, the SVRD is fed to the refueling mechanism 27, which supplies the SVRD to the slot of the core 23. Then, using the electric drive 20, the core 23 is moved to the leftmost position. The position of the guide rod 19 and the core 23 is monitored using a television camera 6 or 7, an image is transmitted via a cable 8 to the monitor 10 of the television system 9. When the core 23 is rotated by means of an electric drive 20, the SVRD is wound. If necessary, the uniformity of the installation of the turns of the SVRD is corrected with the help of the guide rod 19, which is moved by the electric drive 21 by the lever 24 to the left or right from the remote control post (not shown in the sketches). The SVRD riots are dumped into the accumulation cavity 25 under the influence of the riot's own weight, while the core 23 is diverted to the leftmost position by the electric drive 20, allowing the riot to fall down into the accumulation cavity 25.

The provisions of the rotary lid 2 during its fixation provide for the possibility of observing, with the help of television cameras 6 and 7, the processes of filling, winding the SVRD and dumping and filling the storage cavity with 25 riots of the SVRD. One of the provisions of the rotary cover 2 is provided for switching a special television system from the television camera 6 to the television camera 7 or vice versa.

The rotation and fixation of the rotary cover is carried out in the following order:

- when you press the lever 14, the spring 16 is stretched and the latch 12 comes out of the groove 11;

- then using the handle 13, the rotary cover 2 is rotated to the desired position and is fixed.

Unloading of SVRD riots from the device into the RW container (not shown in the sketches) is carried out in the following order:

- before installing the device on the radioactive waste container, if necessary, turn the rotary cover 2 with the television cameras 6 and 7 to a position in which normal monitoring of the process of unloading the SVRD is ensured;

- the device using a crane is installed on the container;

- then, with the open gate of the RAO container, open the gate 28 of the device and unload the SVRD riots from the storage cavity 25 into the RAO container, controlling the unloading process according to the image on the monitor 10 of the television system 9;

- after unloading, the gate 28 and the gate of the radioactive waste container are closed, the device is removed from the radioactive waste container.

The use of a device for extracting spent assemblies of internal reactor detectors, in which the guide rod is equipped with an electric drive, and the electric drives of the core and the guide rod are connected to the remote control post, and the cover in the device is rotatable, equipped with a monitoring system, presented in the form of cavities with protective cylinders placed in them with television cameras connected to a television system, allows for remote control of refueling, winding, filling eniya holding cavity FCDC riots, a reset riots FCDC container RW and watching them, provides ease of use and reduces the time spent operating personnel near the radiation source.

Claims (1)

A device for extracting spent assemblies of in-reactor detectors, comprising a thick-walled cylindrical body equipped with a lid with a monitoring system, in the cavity of which there is a refueling mechanism, a gate, a catcher, a guide rod, a winding device including an electric core, characterized in that the guide rod is electrically driven and pivotally the lever connected to it and the electric drive, and the electric drives of the core and the guide rod are connected to the remote control post, and the roofs It is made rotatable with the possibility of fixing it in several positions, and the monitoring system is represented by cavities made in the rotatable lid, closed with protective glasses installed from below, and television cameras electrically connected to the television system are fixed in the cavities of the rotatable lid.

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