在保证安全的前提下 ,提高环状模块式高温气冷堆(RMHTGR)的功率 ,以改善其经济性。选取 RMHTGR单堆功率为 35 0 MW,利用高温气冷堆物理模拟程序 VSOP对其平衡态进行了初步物理设计研究 ,计算并分析了有效增殖系数 keff、堆内燃耗分布、反应性温度系数、事故下余热排除等参数。结果表明 :堆在平衡态热态满功率和冷态下具有负的反应性温度系数 ,在失流事故下 ,堆内温度不会超过16 0 0℃。提出的方案是可行的 Under the premise of ensuring safety, the power of ring-shaped modular HTGRs (RMHTGR) will be raised to improve their economy. The RMHTGR single-stack power of 35 0 MW was selected. The physical design of the equilibrium state was carried out by VSOP physical simulation program VSOP. The effective growth coefficient keff, the internal fuel consumption distribution, the reactivity temperature coefficient, the accident The remaining heat removal and other parameters. The results show that the reactor has a negative temperature coefficient of reactivity at full power and cold state in the equilibrium state, and the temperature in the reactor does not exceed 16 0 0 ℃ in the event of a loss of current. The proposed solution is feasible