我厂焊接车间新厂房X线探伤室于1989年初动工,同年10月底竣工,试用。在申领X线机使用许可登记证时,经北京市放射卫生防护所监测,发现探伤室四周墙壁于1.3m高处每隔0.7m有一个X线外泄空洞,大小约为8×10cm,共计52个,泄出X线强度在200～10000mR/h之间。是一起严重的X线外泄事件。经调查,原探伤室设计方案及竣工验收均未经卫生部门审查,建造过程中也未进行施工质量监督,52个外泄空洞系脚手架孔未填实所 The X-ray flaw detection room of the new workshop of the welding shop of our factory was started in early 1989 and was completed at the end of October of the same year. When applying for the X-ray machine license registration certificate, monitoring by the Beijing Radiation Protection Institute found that there was an X-ray leakage hole every 0.7m at a height of 1.3m around the detection room, and the size was about 8×10cm. A total of 52 vented X-rays were between 200 and 10000 mR/h. It was a serious X-ray incident. After investigation, the design of the original flaw detection room and completion acceptance have not been reviewed by the health department, construction quality supervision has not been carried out in the construction process, and 52 holes for external leakage holes have not been filled with scaffold holes.