【摘要】 基于铀氢体系的微型自控反应堆(HPM)是一种新型堆型,具有良好的发展潜力,要建立该堆,需要对铀氢体系的中子学性能进行详尽的研究。论文在PCT测试系统上对铀床内的铀进行吸放氢循环,取50次循环次数后的氢化物做工业CT扫描,获得铀氢化物的填料密度分布,然后利用MCNP程序的重复几何结构功能以及实验得到的参数,建立了HPM堆芯临界计算的数学模型,并计算了堆芯临界状态下的能谱以及中子注量率分布,误差小于3%,为HPM的设计提供理论参考。更多还原

【Abstract】 The small self- regulating reactor based on UHx- H2 system is a new reactor and has a well development potential. In order to build this reactor,neutronics study should be done for the UHx- H2 system. In this paper,we studied hydrogen absorb- discharge circle for uranium bed on PCT test system,than scan the hydride by ICT after 50 circles to get uranium hydride filling density distribution. After that,we used repeated geometry structure function to build HPM reactor core mathematics model for criticality calculation,and calculated the energy spectrum and the neutron fluence rate distribution on critical state,the deviation is less than 3%.This result can provide some theoretical consults for HPM design.更多还原