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实践经验
              实践经验

              DOI:10.11973/wsjc240259



               450 kV 工业探伤装置 X 射线曝光室辐射屏蔽计算




                                                       孙青峰 ,孙雨峰      2
                                                             1
                      (1. 中国船舶集团国际工程有限公司,北京 100121;2. 张家口机械工业学校,张家口 076250)

                       摘  要:以450 kV工业探伤装置X射线曝光室屏蔽设计为例,补充《工业X射线探伤室辐射屏
                   蔽规范》中400~500 kV区间内的计算参数,引入《医用外照射源的辐射防护》宽束X射线通过混
                   凝土层的减弱曲线图,引入《辐射防护手册第一分册》中500 kV的X射线在铅和混凝土中值层、半
                   值层厚度参数,计算在满负荷工况下有用线束屏蔽、泄漏辐射屏蔽、散射辐射屏蔽混凝土墙体及铅
                   板大门屏蔽所需的防护厚度;然后综合以上计算,得出各方向所需屏蔽厚度。同时指出,考虑现场
                   施工条件,混凝土厚度在此基础上应适当加大,以满足现场施工要求。
                       关键词:探伤装置;X射线;屏蔽计算;泄漏辐射;散射辐射

                       中图分类号:TG115.28      文献标志码:B    文章编号:1000-6656(2025)02-0084-04

                    Calculation of radiation shielding for X-ray exposure chamber of 450 kV industrial
                                                    flaw detection device


                                                   SUN Qingfeng , SUN Yufeng 2
                                                              1
                   (1. CSSC International Engineering Co., Ltd., Beijing 100121;  2. Zhangjiakou School of Mechanical Engineering,
                                                   Zhangjiakou 076250, China)
                      Abstract: The shielding design of the X-ray exposure chamber of 450 kV industrial flaw detection device was analyzed
                   as an example, the calculation parameters in the 400-500 kV range of The Code for Radiation Shielding of Industrial
                   X-ray Detection Chamber were supplemented,  wide-beam X-ray through the attenuation curve of concrete layer in
                   Radiation Protection of Medical External Sources was introduced, and the 500 kV X-ray thickness parameters of what-

                   value layer and half-value layer in lead and concrete in Radiation Protection Manual, Volume 1 was introduced, the
                   shielding thickness considering useful wiring harness shielding, leakage radiation shielding, scattering radiation shielding
                   concrete wall and lead gate shielding was calculated under full load condition. Based on the above calculation, the shielding
                   thickness statistics required in each direction was obtained. Considering the site construction conditions, the concrete
                   thickness should be appropriately increased on this basis to meet the requirements of the site construction.
                      Key words: flaw detection device; X-ray; shielding calculation; emit radiation; scatter radiation


                  常 见的X射 线探 伤机 管 电压 为 160~450 kV                文献   [1-2] ,并依据项目情况及土建实施情况及透射参
             (管电压500 kV以上的X射线一般需采用加速器才                          数复合作用情况 ,适当加大以方便施工;规范说明
                                                                               [3]
              能实现),市场上单台最大管电压450 kV的探伤机                         了工业X射线探伤室辐射屏蔽要求,注明了计算适
              可通过调节输出不同管电压的射线。目前采取的屏                            用于500 kV以下工业X射线装置的探伤室,但查阅
              蔽计算参照GBZ/T250—2014《工业X射线探伤室                       附录中管电压与参数关系图表,管电压区间范围为
              辐射屏蔽规范》(以下简称规范)及最新屏蔽研究                            150 ~400 kV,不满足管电压450 kV情况下的计算
                                                                需求。
                 收稿日期:2024-06-03
                                                                     通过查阅文献,引入400 ~500 kV区间内相关
                 作者简介:孙青峰(1985—),男,硕士,高级工程师,主要从事建筑
                                                                参数,计算管电压450 kV工况下,有用射线辐射、泄
              设计、建筑设计咨询的相关工作
                 通信作者:孙青峰,sunqingfengjianzh@163. com            漏辐射及散射辐射条件下曝光室墙体及工件大门所
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