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Study on Some Problems About Shielding Design for Electronic Irradiation Accelerators Below 10MV

Author: ShangJing
Tutor: LiWeiMin；LiYuXiong
School: University of Science and Technology of China
Course: Nuclear Science and Technology
Keywords: Irradiation Accelerator Shielding design Dose calculation methods MCNP
CLC: O572.211
Type: Master's thesis
Year: 2011
Downloads: 122
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Abstract


In recent years , electron irradiation accelerator made ??tremendous development and is widely used in the field of food preservation , material modification , medical equipment sterilization . Irradiation accelerator due to its unique security features to attract the attention of more and more investors to create huge economic value and social benefits of radiation processing industry is becoming a mainstream device . Therefore, in-depth research around the irradiation accelerator radiation shielding design problem has a very practical significance . According to the NCRP report a comprehensive summary of the low-energy irradiation accelerator radiation field around the estimation methods , and field measurements for the two - electron linear accelerator . Measurement results agrees well with theoretical estimates , fully explain the reasonableness of the estimation method . For the measurement of radiation dose in the maze path that can ensure to reach the desired shielding effect making the maze path design to make the maze path has a certain length . This article uses the Monte Carlo code MCNP some of the problems encountered in the shielding estimates do some simulation . Including photon incident on concrete medium scattering coefficient for electron beam the blacksmith target after the X-ray emission rate , and how to determine the maze path is bent at the scattering surface . Simulation results References recommended value in line with the good , powerful we are reasonable for the processing of these parameters in the estimation process . The results of these calculations to make up for the lack of defects of the data given in the reference . Finally, the case for shielding body in the presence of pipelines throughout made ??specific calculations , quantitative given the impact of the pipeline for the shielding effect , provide a reference for future similar shield design . Hopefully, this article made ??to the design of the study and exploratory work to help shield for future design and evaluation work around the low - energy irradiation accelerator shielding .

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > High-energy physics > Particle physics > Experiments and determination > High Energy Accelerator
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