Design method and device of pneumatic transport device for high-density shielding material particles

Abstract

The invention relates to a design method and device of a pneumatic transport device for high-density shielding material particles, and belongs to the technical field of radiation protection, and the method comprises the following steps: determining key input parameters, key output parameters and the value range of the key input parameters of the pneumatic transport device; establishing a three-dimensional physical model of the pneumatic transport device; performing grid division on the three-dimensional physical model to obtain a grid model of the pneumatic transport device; performing CFD calculation on the grid model according to the set air inlet pressure, and obtaining CFD calculation results of the pneumatic conveying device under different working conditions; andcomparing the CFD calculation results under different working conditions, and determining the optimal parallel structure and air inlet pressure of the Venturi tube. On the basis of the Venturi tube principle, by optimizing and improving the parallel structure of the annular pressurizing chamber and the multiple Venturi tubes, high-density granular shielding substances can be conveyed in a long distance, and the long-distance construction requirement of a field temporary shielding device of a nuclear power plant is met.

Description

technical field [0001] The invention belongs to the technical field of radiation protection, and in particular relates to a design method and a device for a high-density shielding material particle pneumatic transport device. Background technique [0002] During the maintenance period of nuclear power plants, in order to reduce the collective dose of occupational exposure personnel, before implementing management control measures and using personal protective equipment, engineering control measures such as temporary shielding devices are the primary means of radiation protection for occupational personnel. For radiation hotspot areas with high surrounding dose rates and requiring maintenance, before allowing maintenance personnel to enter the relevant areas to carry out work, building temporary shielding devices is a necessary protective measure, which is also to reduce the exposure dose of workers during nuclear power plant shutdown maintenance. an important measure. [00...

AI Technical Summary

Problems solved by technology

[0003] Commonly used temporary shielding devices are generally made of heavy metals such as lead and tungsten, and their mass is relatively large, so there are many deficiencies in the actual use process

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