Bath Electrical Heating Device for Deactivation

Abstract

A bath electrical heating device for deactivation designed to provide heating of bath deactivation and the deactivating solution in it before deactivation of reactor facility equipment and ensuring the removal of excess heat in the process of deactivation. The invention improves reliability, reduces the material consumption of the device and simplifies the structure installation and repair. The device performs at least from three heat insulation blocks in the form of coaxial metal screens, installed with an air gap from the heater. The heater with current leads is made in hermetic perform, each heat insulation blocks supplemented with an air-gap coaxial metal protective casing. The air gap of which in the upper part is covered with a cap with a visor whose diameter exceeds the external diameter of the protective casing, wherein solid cover of the upper protective casing install a sealed coupling.

Claims

1. A bath electrical heating device for deactivation of vertical execution, that contained a heater located on the outer surface of bath deactivation from a wire with high electric resistance with current leads and couplings and thermal insulation blocks, wherein the device consists at least from three heat insulation blocks in the form of coaxial metal screens and installed with an air gap from the heater, wherein the heater with current leads is made in hermetic perform, each heat insulation blocks supplemented with an coaxial metal protective casing, the air gap between the heat insulation blocks and protective casing in upper part is covered with a cap with a visor whose diameter exceeds the external diameter of the protective casing, wherein solid cover of the upper protective casing install a sealed coupling, in addition, in the upper and lower part of the side surface of the protective casing make through holes, the total area of which is equal to or greater than the area of the air gap between the heat insulation block and protective casing.

Description

[0020] The concept of the invention is explained by the drawing. FIG. 1 shows the general view of the bath for deactivation 1 of vertical execution. Hermetic heater 2, for example, from the heat-resistant cable KHMCHX-H according to TU16.K03-43-2006, is mounted on the bath for deactivation 1. Heat insulation of the heater 2 is made in the form of blocks 3 of coaxial metal screens 4, for example, from thin sheet corrosion-resistant steel 08X18H10T according to GOST 5582-75, which are installed with an air gap 5. Hermetic current leads 6 are installed on the outer surface of the screen 4. Each heat insulation unit 3 is equipped with installed with an air gap 7 coaxial metallic protective casing 8, an air gap 7 of the protective cover 8 in the upper part is closed with a visor 9, whose diameter is larger than the outer diameter of the protective casing 8, wherein in the solid cover 10 upper protective casing 8 a sealed coupling 11 is installed. In addition, at the top and bottom of the side surface of the protective casing 8 are made through holes 12, total area of which is not less than the area of the air gap between the outer screen 4 and the protective casing 8.

[0021] The installation of the device begins with the installation of the heater 2, then the internal screens 4 heat insulation blocks 3, perform electrical installation and install an external protective casing 8. In preparation for operation heater 2 and heat insulation blocks 3 provide the initial heating of deactivating solution and bath for deactivation 1. By choosing he number of screens 4 and size of air gap 5 required surface temperature of heat insulation block 3 is reached. Perform the heater 2, current lead 6 and the coupling 11 in hermetic execution eliminates the possibility of a short circuit with possible leaks of the deactivating solution. Since the outer diameter of visor 9 exceeds the outer diameter of the protective casing 8, it is also excluded that the deactivation solution can enter the interior of the device. In the process of deactivation RF equipment excess heat is removed from the bath for deactivation 1 through the openings 12 due to air circulation between the heat insulation unit 3 and protective casing 8. By selecting size of air gap 7 temperature reduction of protective casing 8 is achieved to ensure the safety of maintenance personnel in the process of deactivation of RF equipment. All materials used in the device allow deactivation in case of spillage of deactivating solution.

[0022] Thus, use of the claimed technical solution in comparison with known devices provides increased reliability of the device: reduced material consumption, simplified installation and repair of the device, provided, if necessary, the possibility of device deactivation, initial heating of the equipment is provided by the attenuation of radiant heat exchange by the screens, provided in deactivation process removal of excess heat due to circulation of air between the heat insulation block and protective casing.