SU397094A1 - Transfer machine - Google Patents

Abstract

1. LOADING MACHINE for a fast neutron reactor, comprising a transport device, a sealed container, a cooling system for a heat generating assembly during an overload, a handling device and a gate, characterized in that, in order to simplify the design of the transfer machine and to simplify the overload technology, the handling device performed in the form of a rod of two coaxial tubes, one of which is connected to the cooling system, and the other Tpiy — ba is equipped with a drive for moving it relative to the primary pipe and a nozzle with a device, for example in the form of bevels cone for sealing connection to the heat generating sborkoy.2. A machine according to claim 1, characterized in that, in order to ensure the orientation of the heat gap, the assembly in azimuth by ensuring the rotation of the tubes with the same angular velocity, the outer and inner tubes of the rod are actuated. I

Description

SLE CO

ABOUT

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The invention relates to the field of atomic technology and can be used to overload a fast neutron reactor with a liquid metal coolant, in particular sodium. A known reloading machine for overloading a fast neutron reactor with a liquid-metal coolant with cooling of heat generating assemblies during an overloading process. It contains an airtight container and a transport device, with which you can move the airtight container over the loading area of the reactor. The sealed container includes a gripping body with a drive, a handling device and a gate. The gripping organ is intended to be installed in a sealed container of the handling device, the gate serves to seal the container. The manipulator is designed to remove the irradiated heat-generating assembly from the reactor core and then install it into the case with the heat carrier to remove the residual heat of the heat-producing assembly, as well as to install a fresh heat-generating assembly into the reactor core. A manipulating device is essentially an autonomous machine with a powerful plate that performs the role of biological protection in case of overload, capture with the drive of its movement, a cover and a number of mechanisms intended to for handling the case. However, such an overloading machine is complicated due to the complexity of the handling device and the overload technological process. In addition, a large residual heat release of the overloaded heat-generating assembly requires the presence of a large-sized case for sodium, which increases the overloading machine body. Under the action of radioactive radiation, sodium becomes radioactive, which raises increased requirements for the radiation protection of the reloading machine. The purpose of the invention is to simplify the design of the reloading machine and the overload technology. This goal is achieved by introducing into the proposed reloading machine 942 a cooling system with an inert gas, which is passed through the heat assembly with a rod of two coaxial pipes, one of which is connected to the cooling system, and the other pipe is driven to move it relative to the first pipe and the nozzle with a device, for example, bevels in the form of a cone, for a tight connection with the heat emitted by the assembly. By inert gas, in this case, is meant a gas that does not react with sodium and in which, under the action of radioactive radiation, induced radiation or it is insignificant, for example, argon. FIG. 1 shows the proposed reloading machine, a general view, in FIG. 2 is a section (manipulating device) A-A in FIG. If in FIG. 3 - the lower part of the handling device with a nozzle (node in Fig. 2). Reloading machine 1 contains a sealed container 2 and a closed cooling system 3, which are placed on the transport device 4, moving along the loading rod of reactor 5, which has a charging port 6 and a gate 7. The container 2 contains a handling device 8 and a gate 9 of the container sealing. The manipulator 8 comprises a carriage 10 suspended by means of a chain 11c with a flexible cooling system hose on an sprocket 12 enclosed within it, and two running shafts 13 with gear wheels 14 and 15 coupled to gears 16 and 17 respectively, which sit on shafts 18 and 19 rotational drive (not shown). The carriage 10 includes gears 20, 21, 22 and a rod 23 having an inner pipe 24 with a tongue 25 and an outer pipe 26, which are interconnected for metering in the upper part by a syphonic seal 27. The drive shafts 13 are intended to guide the carriage 10 as it moves with the chain 11 inside the container 2 and for transferring the movement to the outer and inner pipes of the rod from shafts 18 and 19. At the upper end of the pipe 24 there is a gear 28 and a flexible hose of the cooling system, and at the lower end there is a gripper 29 with bevels 30 and bevel 31 per lever agah capture. The pipe 26 has a screw thread 32 and a keyway 33 in the upper part, and a copier 34 and a nozzle 35 with a device for a tight connection with a heat-gap assembly 36 at the lower end. The reloading machine operates as follows. The container 2 is conveyed by the transport device 4 to the loading nozzle 6 of the reactor and is connected to it. After the air is pumped out from the interdisc of the berry space formed by the gates 7 and 9, and the gates are filled with argon, they are opened. Rotating the sprocket 12, the carriage 10 together with the rod 23 is lowered onto the chain 11 along the running shafts 13 until the gripper 29 stops Into the head of the warming assembly 36 .. At the same time, the labor 26, together with the nozzle 35, are lifted to the extreme upper position, and the gripping jaws 29 are open. By activating the drive shaft 18 through the gears 14 and 16, 21 and 22, the movement is transmitted to the pipe 26. In order for the pipe 26 to move progressively, the shaft 19 is braked. In this case, the tube 26 is unscrewed from the gear wheel 22 at its upper end of the screw thread 32 and slides the keyway 33 along the key 25, moving progressively along the inner tube 24. As it moves downward, the tube 26 acts on the bevels 30 of the gripper 29 and closes it. Upon further movement, the pipe 26 with the nozzle 35 abuts against the surface of the heat splitting assembly, forming a hermetic passage for argo to the cooling systems into the internal cavity of the heat splitting assembly. Then, by rotating the sprocket 12, the cathode, together with the rod 23 and the heat-generating assembly 36, which is associated with it, begin to enter the container 2 of the reloading machine. As soon as the lower end of the heat slug assembly 36 comes out of the reactor core coolant, the cooling system automatically turns on. Arg. From the cooling system, through the pipe 24, the booms under pressure are blown through the heat snapping assembly 36 and cools it. After the heat-slug assembly 36 is installed in the container 2, the gates 7 and 9 are closed, argon is removed from the interspacing zone formed by these gates, the discharging machine with the nozzle 6 is disconnected, and the reloading machine is transferred to the exposure zone. There, the irradiated heat generation assembly is removed from the transfer machine. Due to the fact that the heat-gap assembly in cross-section can take the form of a polygon, when it is installed both in the holding zone and in the active zone of the reactor, there is a need for its orientation. The orientation of the heat generating assembly is carried out by rotating it around a longitudinal axis. For this, movement is simultaneously transmitted to pipe 26 from shaft 18 through a system of gear wheels 16 and 14, 21 and 22, and to pipe 24 from shaft 19 through a system of gear wheels 17 and 15, 28 and 20 ... Gear ratios of gear wheels are matched by This means that the outer and inner tubes rotate at the same angular velocity in the same direction. In this case, the pipe 26 does not move relative to the pipe 24, and consequently, opening of the gripper 29 cannot occur. After orientation of the heat-generating assembly 36, it is lowered into the transport container. Cooling of the heat slug assembly takes place from the moment of its removal from the reactor coolant to the end of the installation in the transport container. Then, the grip opens and the bar disengages from the heat generation assembly. The gripper 29 is opened by correspondingly turning on the drive of the shaft 18. At the same time, the pipe 26 rises upwards, acts with the copiers 34 on the bevels 31 of the gripping levers 29 and opens it. By switching on the drive of the chain 11, the carriage 10 with the rod 23 is drawn into the container 2. The reloading machine is transferred to the storage zone of the fresh heat emitters. assemblies, where the installation of a fresh heat-slitting assembly into the container 2 is carried out. The process of installing the fresh heat-generating assembly into a sealed container is carried out similarly to that. the process of setting up an irradiated heat shed assembly from the reactor core to container 2, but without using the cooling system.

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Claims (2)

1. A reloading machine for a fast neutron reactor, comprising a transport device, an airtight container, a cooling system for the fuel assembly during overload, a handling device and a gate, characterized in that, in order to simplify the design of the loading machine and simplify the technology of overload, the handling device made in the form of a rod of two coaxial pipes, with one of the pipes connected to the cooling system, and the other pipe equipped with a drive for its movement relative to the first pipe and us dkoy with a device, such as a conical bevels, for sealing engagement with the fuel assembly. 2. Machine pop. 1, characterized in that, in order to ensure the orientation of the fuel assembly _t in azimuth by ensuring the rotation of the pipes with the same angular g speeds, the outer and inner tubes of the rod are equipped with drives. SU ... 397094 1 39;