克拉玛依市X射线探伤放射防护状况调查

Survey on Radiation Protection Condition of X-Ray in Karamay

目的了解克拉玛依市X射线探伤机放射防护状况,加强安全使用意识和管理,确保放射工作人员与公众的安全与健康。方法方法各探伤场所选择最常使用、额定电压电流最高的探伤机,监测时将探伤机的电压及电流开至允许的最大值,待曝光时检测。个人剂量片由放射作业人员工作时佩戴,每两月回收检测一次,年个人剂量为6次剂量的合计值。结果固定两间探伤室铅防护门处剂量分别高达24.84、46.09μGy/h,最低为0.42μGy/h;操作位的剂量为0.14～1.25μGy/h;现场探伤操作位的剂量在1.32～31.73μGy/h之间;个人剂量最高11.38 mSv,超过年个人剂量限值的1/2。结论克拉玛依市X射线探伤机的防护不能完全符合标准要求。应妥善解决固定探伤室的铅防护门的密闭问题,加强探伤室处现场探伤的管理和防护。

Objective To know radiation protection condition of X-ray flaw detection in Karamay,strengthen radiation workers＇ security awareness of hermetic radiation source and management,ensure safety and health of radiation workers and the public.Methods X-ray detecting machines were commonly used with the highest rate voltage and current,when detecting,the maximum of voltage and current was applied.Individual dose tablets that the workers wore were detected every two months when they were exposed to radiation.Personal dose per year was total value of 6 doses.Results The highest doses for lead doors of two fixed detection rooms were 24.84 μGy/h and 46.09 μGy/h,the lowest dose was 0.42 μGy/h,the dose of operation site was 0.14-1.25 μGy/h.When field detection worked,the dose of operation site was 1.32-31.73 μGy/h,the highest personal dose was 11.38 mSv.Conclusion In Karamay,radiation protection conditions of X-ray flaw detection don＇t meet the national standards.The problem that flaw detection room door can＇t be completely closed should be properly resolved;the management and protection of the field detection should be enhanced.