Development of a mobile personnel radiation protection equipment
Objective To design a mobile personnel radiation protection equipment for operation in environments with high radiation such as spent fuel reprocessing plants,to achieve simultaneous protection against γ radiation,neutron radi-ation,and radioactive aerosol,to reduce the internal and external exposure dose of radioactive workers,and to meet the re-quirement of operation for two hours.Methods The core parts of the mobile personnel radiation protection equipment in-cluded a shielding chamber and a respiratory maintenance system.An automated chassis was used for the movement and lift-ing of the shielding chamber.MCNP software was used to simulate and calculate the protective effects of shielding chamber made of different materials and material thicknesses.Experimental verification of the shielding chamber design was conduc-ted.Mathematical models were established to describe the variations in the content of various gases in the chamber with per-sonnel operation time.A respiratory maintenance system,a harmful gas absorption device,and an automated mobile chassis were designed.Results The shielding chamber made of polyethylene with a thickness of 80 mm achieved an 80％neutron shielding rate.The respiratory maintenance system could support workers for 2 hours of operation inside the equipment.The mobile chassis allowed operation of the equipment with one person.Conclusion This mobile personnel radiation protec-tion equipment can solve the problem in simultaneous protection against γ radiation,neutron radiation,and radioactive aero-sol.The equipment can provide radiation protection for radioactive workers,reduce exposure dose,and reduce personnel burden.This system provides technical means for the operation and maintenance of equipment in high-radiation sites such as spent fuel reprocessing plants.
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