中国散裂中子源靶站热室施工关键技术

Key Construction Technology of Thermal Chamber of China Spallation Neutron Source Target Station

散裂中子源是探索物质微观结构的理想探针。但在束流线轰击靶心产生中子的过程中会瞬发高剂量的辐射,被污染的物质和部件需在热室内进行彻底处理。为确保实现热室的完全密封屏蔽、易操作清洁等功能,采用了大型不锈钢壳体制作安装技术、大型铸铁屏窥视窗安装预埋技术以及重质混凝土施工技术等。总结了一套较完整的屏蔽密封功能区域的施工指导建议。

Spallation neutron source is an ideal probe to explore the microstructure of materials.However,in the process of beam line bombarding the target center to produce neutrons,high doses of radiation will be generated.The contaminated materials and components need to be thoroughly treated in the thermal chamber.To ensure the complete sealing and shielding of the thermal chamber and easy operating and cleaning,the large-scale stainless steel shell manufacturing and installation technology,large-scale cast iron screen viewing window installation and embedding technology and heavy concrete construction technology are adopted.A set of relatively complete construction instructions and suggestions for shielding and sealing functional areas are summarized.