Z箍缩驱动聚变-裂变混合能源堆(Z-FFR)以较长周期(10 s)脉冲式运行, 为实现3000 MW的热功率输出, 单个脉冲需要产生的能量较大, 包层和第一壁在强热冲击下的瞬态传热和温度特性是决定Z-FFR技术可行性的关键问题之一。通过理论计算, 分析了在连续脉冲作用下包层和第一壁温度随时间的变化规律。同时以输出恒定的电功率为目标, 提出了展平系统输出功率的简便方法, 并分析了出口冷却剂温度的波动特性。结果表明材料最高温度均在安全限值内, 第一壁表面瞬时高温层厚度约为0.5 mm, 系统输出功率波动幅度在-2.84%~+2.05%范围内。

Z-pinch driven fusion-fission hybrid energy reactor (Z-FFR) is a new energy system, which is helpful to the sustainable development of nuclear energy. It runs in a pulsed mode with a period of 10 s, in order to output a mean thermal power of 3000 MWt, a large quantity of energy has to be generated in a pulse. The transient heat transfer and temperature variation of the blanket and first wall in the strong heat shock situation are key issues to the technical feasibility of Z-FFR. In this paper, the temperature variation of blanket and first wall under consecutive heat pulse is analyzed through numerical simulation. Meanwhile, with the aim of exporting electric power stably, a simple method of stabilizing the output power is proposed, and the fluctuation character of the outflow in the main pipe is described. The results show that, the maximum temperatures of all materials are in the safety margin, the thickness of the layer that has a relative high temperature on the surface of the first wall is about 0.5 mm, the output power has a fluctuation of -2.84% to +2.05% relative to the nominal value.