在综合考虑反应堆寿命以及热工安全设计等限制条件的基础上，使用蒙特卡洛程序进行了堆芯几何优化分析。其次，分析了含可燃毒物的布置优化方案，通过在堆芯靠近反射层附近的燃料棒中添加2%wt的可燃毒物Gd2O3，径向功率因数从2.30降低到1.30，研究同时比较了不同分层组合下的径向反射层对滑块反应性控制效果的影响。最后，基于分析结果，提出了堆芯质量最小化的优化设计方案和最优反应性线性控制方案。针对屏蔽系统，基于蒙卡软件计算结果评估不同材料的屏蔽性能，并综合考虑系统总体布局，利用系统中其他设备进行辅助屏蔽，对屏蔽体几何体进行局部优化。堆芯热功率20 MWt，寿期超过3300满功率天。

Under the design constraints of reactor life and thermal safety, the core geometry optimization analysis was performed using the OpenMC. Secondly, the study analyzed the influence of combustible poisons on power distribution and compared the influence of different layered combinations on the radial reflector on the reactivity control effect of the slider. By adding a 2% mass fraction of combustible poison Gd2O3 to the fuel rods near the reflector in the core, the radial power factor can be reduced from 2.30 to 1.30. Finally, based on the analysis results, an optimized design scheme for core and the optimal reactivity linear control scheme are proposed. Concerning the shielding system, the shielding performance of different materials is evaluated based on Monte Carlo software results. Auxiliary shielding is provided by recuperator and precooler. Moreover, the shield geometry is optimized. The thermal power of the reactor is 20 MWt with a lifetime of 3300 EFPDs.