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首页> 美国政府科技报告 >DESIGN OF GAS-FILLED DOUBLE-BEND DUCTS IN CONCRETE SHIELDS AGAINST GAMMA RADIATION:PROPORTIONMENT OF THE DUCT AND THE EMBEDDED IRON LAYERS FOR POINT SOURCE RADIATION AND COLLIMATED RADIATION:DIN 25 427, PART 2
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DESIGN OF GAS-FILLED DOUBLE-BEND DUCTS IN CONCRETE SHIELDS AGAINST GAMMA RADIATION:PROPORTIONMENT OF THE DUCT AND THE EMBEDDED IRON LAYERS FOR POINT SOURCE RADIATION AND COLLIMATED RADIATION:DIN 25 427, PART 2

机译：针对Gamma辐射的混凝土罩中充气双弯管的设计：针对点源辐射和辐射辐射的管道和嵌入式铁层的比例：DIN 25 427，第2部分

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The standard gives guidelines for the geometric proportioning of the duct and of the additional iron insertions which are necessary in order to reduce the entering radiation in all directions, at least to the extent that behind a shield dimensioned to satisfy shielding requirements only a local increase in the dose rate of a given fraction as compared to the dose rate behind the massive wall will occur. The standard is valid for the design of the dimensions and the necessary iron wall insertions in the case of gas-filled ducts with rectangular or circular cross sections that are bent twice at right angles in ordinary concrete shields against gamma radiation from nuclear reactions, nuclear processing plants, and caves. It is not valid for neutron radiation. (ERA citation 03:051518)

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