轴向行波堆堆芯设计

Core Design of Axial Traveling Wave Reactor

从中子扩散方程和燃耗方程出发,详细推导了轴向行波堆一维简化计算模型,并针对公式推导中的相关假设从反应堆物理的角度进行解释,从理论上论证了轴向行波堆燃烧概念的可行性。针对轴向行波堆设计难点,即启堆区设计,从启堆区长度选取、启堆区轴向分段、启堆区轴向各段核子密度分布等方面进行了计算分析。结果表明,在合理启堆区设计基础上得到的2 000 MW轴向行波堆堆芯方案能满足全寿期内反应性波动小、重要物理特性参数保持一定形状不变在轴向传播的要求。

One-dimensional calculation model of axial traveling wave reactor （TWR） was detailedly deduced from neutron diffusion equation and burnup equations. In the expression derivation process, some relevant assumption was explained based on reactor physics theory, which theoretically demonstrated that the burnup concept was feasibility. The startup area design which was key technology for a axial TWR was analyzed from startup area length, axial segment partition and axial distribution of nuclide density and so on. Based on the results, a 2 000 MW axial TWR core design has been proposed, which satisfied the requirement of small excess reactivity swing and important reactor characteristics moving along the axial direction with constant distribution.