【摘要】 钠冷快堆一回路²⁴Na的饱和比活度是堆本体和一回路钠工艺间屏蔽设计的源项数据。本文以中国示范钠冷快堆（CFR600）堆本体为研究对象,使用JSNT程序对堆本体内一回路钠活化进行三维计算研究,通过研究获得了主容器内冷却剂活化反应率分布及一回路钠的饱和比活度,研究结果与二维离散纵标法程序设计结果进行了对比,二者符合较好。研究结果表明:JSNT程序对大型钠冷快堆一回路钠活化计算结果可靠,可获得精细的三维²⁴Na产生率分布,计算方法可用于同类型反应堆一回路钠活化及其他堆型反应堆冷却剂活化计算。更多还原

【Abstract】 The saturated specific activity of the primary circuit ²⁴Na is one of the important source terms for the shielding design between the reactor block and the primary sodium-processing room in the sodium-cooled fast reactor.In this paper,the reactor block of the China Demonstration Sodium-cooled Fast Reactor（CFR600）is used as the research object,and the JSNT code is used to conduct three-dimensional calculation research on the primary circuit sodium activation in the reactor block.The research results are compared with the design results of the two-dimensional discrete ordinate method code,and the two are in good agreement.The research results show that the JSNT code is reliable for the primary loop sodium activation calculation of large sodium-cooled fast reactors,and can obtain a fine three-dimensional ²⁴Na generation rate distribution.The calculation method can be used for the primary loop sodium activation of the same type of reactor and the activation of other reactor coolants.更多还原