基于MC方法9MeV无损检测电子直线加速器辐射屏蔽优化设计  

Optimization Design of Radiation Shielding calculation for 9MeV Nondestructive Testing Electron linear Accelerator Based on MC Method

作　　者：王兴华 侯铁钢 苏晓书 黄春锋 WANG Xinghua;HOU Tiegang;SU Xiaoshu;HUANG Chunfeng(The Fourth Research and Design Engineering Corporation of CNNC,Shijiazhuang,050021,China)

机构地区：[1]中核第四研究设计工程有限公司,石家庄050021

出　　处：《核电子学与探测技术》2025年第1期134-139,共6页Nuclear Electronics & Detection Technology

摘　　要：本文以9MeV无损检测电子直线加速器工程设计为研究对象,首先采用MC方法FLUKA程序模拟了加速器机头源项,研究机头电子打钨金合金靶产生的X射线,与加速器设备参数进行比对,充分验证了加速器机头模型的可行性,从而可以保障下一步探伤室辐射屏蔽准确性。然后使用FLUKA程序建立模型进行模拟计算,并对辐射防护薄弱区域进行模拟优化设计。模拟屏蔽设计结果表明:本项目物流防护门搭接间距在1.5cm时搭接长度至少100cm,可满足屏蔽要求;当穿墙管角度50°后,通风管出口处泄漏辐射剂量率趋于平缓,随着角度增加,变化不明显,因此从施工及工程造价角度上看,预埋50°穿墙管较为合适。In this paper,the engineering design of the 9MeV non-destructive testing electron linear accelerator is taken as the research object.Firstly,the source term of the accelerator head is simulated by using the FLUKA program of MC method,and the X-ray generated by the head electron hitting the tungsten gold alloy target is studied.The comparison with the parameters of the accelerator equipment fully verifies the feasibility of the accelerator head model.This can ensure the accuracy of radiation shielding in the next step.Then,FLUKA program is used to establish a model for simulation calculation,and the weak area of radiation protection is simulated and optimized.The simulation shielding design results show that the lapping length of the protective door in this project is at least 100cm when the lapping distance is 1.5cm,which can meet the shielding requirements;When the Angle of the throughwall pipe is 50°,the leakage radiation dose rate at the outlet of the ventilation pipe tends to be gentle,and the change is not obvious with the increase of the Angle.Therefore,from the perspective of construction and engineering cost,the embedded 50°through-wall pipe is more appropriate.

关 键 词：电子直线加速器 FLUKA 模拟计算 优化设计 

分 类 号：TL77[核科学技术—辐射防护及环境保护]