【摘要】 对某型号钴-60乘用车安检系统产生的辐射水平进行监测分析。对γ辐射源箱的泄漏辐射水平、监督区边界和控制室的周围剂量当量率，驾驶员驾驶不同车型车辆以不同速度通过安检系统门架时的剂量水平进行监测。距γ辐射源箱5cm和1m处X-γ辐射剂量率最高分别为31.5μSv/h和2.66μSv/h。辐射安全监督区边界及控制室内周围剂量当量率最高为2.35μSv/h，操作位置的周围剂量当量率为0.09μSv/h。乘用车驾驶员位置一次通过有效剂量监测结果不大于0.02μSv。该乘用车安检系统监测结果满足《货物/车辆辐射检查系统的放射防护要求》(GBZ143-2015)和《辐射型货物和(或)车辆检查系统》(GB/T19211-2015)的相关要求。更多还原

【Abstract】 Objective This paper monitored and analyzed the radiation level produced by a certain type of Co-60 passenger car security inspection system. Methods The leakage radiation level of the gamma radiation source box,the boundary of the supervision area and the dose equivalent rate around the control room,and the effective dose of the driver driving different types of vehicles through the gantry of the security inspection system at different speeds were monitored. Results The highest radiation dose rates of X-γ radiation were 31. 5μSv/h and 2. 66μSv/h at 5cm and 1m away from the γradiation chamber,respectively. The highest dose equivalent rate was 2. 35μSv/h at the boundary of radiation safety supervision area and around the control room,the surrounding dose equivalent rate at the operation location is 0. 09 μSv/h. The effective dose monitoring result of passenger car driver’s position is not greater than 0. 02 μSv. Conclusion The monitoring results of the passenger car security inspection system meet the requirements of radiation protection requirements for cargo/vehicle radiation inspection system( GBZ143-2015) and radiation cargo and/or vehicle inspection system( GB/T19211-2015).更多还原