乏燃料运输容器屏蔽性能检测技术

Shielding Performance Measurements of Spent Fuel Transportation Container

我国放射性物质运输安全监管的一项重要内容是对运输容器进行辐射屏蔽性能检测,确保其满足《放射性物质安全运输规程》的要求。在实际对乏燃料运输容器进行辐射屏蔽性能检测时反映出了一些尚需解决的问题和难点,如中子辐射水平测量的可靠性,表面中子辐射水平的准确测量等。本文主要针对乏燃料运输容器屏蔽性能检测中涉及的中子辐射水平测量可靠性开展相关研究。通过分析比较不同类型测量仪器的测量结果,结合乏燃料运输容器外部辐射水平的模拟计算结果,提出优化乏燃料运输容器屏蔽性能检测技术的建议,为技术的完善和乏燃料运输管理工作提供借鉴。

The safety supervision of radioactive material transportation package has been further stressed and implemented.The shielding performance measurements of spent fuel transport container is the important content of supervision.However,some of the problems and difficulties reflected in practice need to be solved,such as the neutron dose rate on the surface of package is too difficult to measure exactly,the monitoring results are not always reliable,etc.The monitoring results using different spectrometers were compared and the simulation results of MCNP runs were considered.An improvement was provided to the shielding performance measurements technique and management of spent fuel transport.