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为了更有效地提高核燃料的利用率，降低核反应堆的运行成本，不仅要研究单循环堆芯燃料管理优化问题，还必须研究多循环优化问题。在回顾现有单循环优化方法的基础上，叙述了一种处理多循环优化问题的方法。利用分步决策的优化策略，多循环优化可以分解为一个两步优化问题。第一步简化多循环优化，使用简化的反应堆物理模型对连续多个循环进行计算，获得每个单循环的优化目标。第二步按照第一步得到的目标进行单循环优化，最终得到各循环最优的组件布置。该方法可以达到延长循环工作期，提高卸料燃耗深度，降低功率峰因子等优化目标。
In order to improve the utilization of nuclear fuel more effectively and reduce the operating costs of nuclear reactors, it is not only necessary to study optimization of single-cycle core fuel management, but also to study multi-cycle optimization. On the basis of reviewing the existing single-cycle optimization methods, a method for solving multi-cycle optimization problems is described. Using the strategy of step-by-step decision-making, multi-cycle optimization can be decomposed into a two-step optimization problem. The first step is to simplify multi-cycle optimization and use a simplified reactor physics model to calculate multiple consecutive cycles to get the optimization goal for each single cycle. The second step in accordance with the first step to achieve the goal of single-cycle optimization, and ultimately get the best cycle of the component layout. The method can achieve the optimization goal of prolonging circulation working period, increasing discharge burnup depth, reducing power peak factor and the like.