工业CT防辐射专业屏蔽实验室建设

Construction of Industrial CT Radiation Protection Laboratory

摘要: 工业CT是工业无损探伤检测的必备仪器设备，但使用这类仪器的实验室建造如果处理不当将对周围环境造成辐射污染。依据现行国家标准，工作场所以及周边环境的屏蔽体(墙)表面大于或等于30 cm处任何监测点的周围X射线剂量当量率应不大于2.5 μSv/h。为满足标准要求，在实验室建造过程中，提出了复合式结构，并增加多种防辐射泄露等处理措施，建成后测试表明辐射泄露率降低至1.0 μSv/h以内。

Abstract: Industrial CT is an essential piece of equipment for non-destructive testing in industry, but if the labs using this kind of equipment aren’t set up properly, they can cause radiation pollution to the surrounding environment. According to current national standards, the equivalent dose rate of X-rays at any monitoring point at or beyond 30 cm from the shielding walls of the workplace and surrounding area shouldn’t exceed 2.5 μSv/h. To meet these standards, during the lab construction, a composite structure was proposed, along with various measures to prevent radiation leakage. After construction, tests showed that the radiation leakage was reduced to below 1.0 μSv/h.