医院中子照射器堆芯中子学参数计算方法

 建立了利用WIMS+CITATION计算医院中子照射器I型堆(IHNI-I)堆芯中子学参数的模型。栅元群常数计算采用WIMS束棒几何模型,控制棒、顶铍反射层、底铍反射层、侧铍反射层以及堆芯每一环燃料元件作为不同栅元类型;全堆芯计算采用CITATION程序R-z几何模型。计算了堆芯的功率分布、顶铍反应性价值、控制棒价值、温度系数、堆芯燃耗等中子学参数,计算结果与文献数据一致。本文所建立的计算模型可用于IHNI-I堆芯的物理计算。

Calculation of IHNI-1 Reactor Core's Neutronics Parameters

Using the WIMS & CITATION program, a neutronic parameter calculating model for the IHNI-I (In-Hospital Neutron Irradiator Mark I) reactor is presented in this paper. In the calculations of the cell group parameters, the bundle model is adopted. The control rod, the top Be reflector, the bottom Be reflector, the side Be reflector and each circle fuel rod of the core are taken as different cell types. In the whole core calculation, the R-z model is adopted by using the CITATION code. The power distribution, the reactivity worth of the control rod and the top beryllium, the temperature coefficient and the burnup are calculated. It is shown that the results agree with the values in literature, and the method is appropriate for the physical calculation of the IHIN-I reactor.