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1994年起对杭州市工业探伤单位进行环境监测和健康监护,现将调查结果报告如下:1 资料与方法1．1 基本情况:杭州市共有工业探伤单位61个,其中2个单位同时有γ射线源。X线探伤机162台,放射工作人员299人。探伤室41个,其中无专用顶棚7个,另20个单位为移动性操作,但探伤机电缆均超过20M,最长为80M。探伤室屏蔽材料以混凝土为主,屏蔽门材料均以铅板为主,平均机房面积为73.3±51.0M~2,平均净空高为6.1±2.8M。29家设置警戒信号,8家安装剂量报警装置,13个机房
Since 1994, Hangzhou industrial testing unit for environmental monitoring and health monitoring, the survey results are reported as follows: 1 Materials and Methods 1.1 The basic situation: a total of 61 industrial testing units in Hangzhou, of which two units have both γ-ray source. 162 X-ray flaw detection machines, radiation staff 299 people. 41 flaw detection rooms, of which there are no special ceiling 7, the other 20 units for mobility operations, but the testing machine cables are more than 20M, the longest is 80M. The test room shielding materials are mainly concrete, and the shielding door materials are mainly lead grids with an average room area of 73.3 ± 51.0M ~ 2 and an average headroom of 6.1 ± 2.8M. 29 set the warning signal, 8 install dose alarm device, 13 computer room