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目的为现场X射线移动探伤作业工作人员快速确定控制区及监督区提供参考。方法计算300 k V、250k V、200 k V这几种常用的X射线机在不同工作条件下的放射防护距离。结果给出不同工况下控制区、监督区边界距离,并提出相应放射防护措施。结论参考值的给出,可以防止人员在已开机但未划定控制区边界时进入控制区造成不必要的照射,在实际作业时,需要通过现场实测的方法最终确定边界。
Objective To provide a reference for the rapid determination of the control area and the supervisory area for X-ray mobile inspection work on site. Methods Radiation protection distances of 300 kv, 250 kv and 200 kv X-ray machines under different working conditions were calculated. The results give the distance between the control area and the supervision area under different working conditions and put forward corresponding radiation protection measures. Conclusion The reference values are given to prevent personnel from entering the control zone when the power is turned on but not delimiting the boundary of the control zone to cause unnecessary radiation. In actual operation, the boundary needs to be determined through field measurement.