一体化压水堆体积小、设备布置紧凑，是新一代船用核动力装置的主要发展方向之一。与商用核电站不同，船用核动力装置要求机动性强，堆芯功率变化频繁、变化幅度大。同时，堆芯具有明显的非线性、时变性和强耦合的特点，传统基于单一功率水平处的堆芯模型无法准确地代表堆芯全功率范围的动态特性，也就无法满足堆芯全功率范围内的控制。为解决这一问题，首先开展基于局部模型的堆芯多模型融合方法研究；其次，基于堆芯多模型融合系统，开展堆芯功率柔性切换控制方法研究；再其次，对堆芯功率柔性切换控制系统进行性能评估；最终，建立一套适用于堆芯功率全范围的柔性切换控制的理论与数值程序。本项目从理论上解决船用核动力装置航行中堆芯功率全范围变工况下的控制问题，对于发展我国一体化压水堆建模理论和新一代核动力装置堆芯功率控制系统的研发具有重要学术和现实意义。

The integral PWR, with small volume and compact equipment layout, is one of the main development directions for the new generation of marine nuclear power plant. Different from commercial nuclear power plant, marine nuclear power plant requires strong maneuverability, frequent changes and large range changes of core power. Meanwhile, the integral PWR core has the obvious characteristics of nonlinear, time-varying and strong coupling. The traditional core model based on a single power level cannot accurately represent the core dynamic characteristics in full power range, and also cannot meet the core control in the full power range. To solve the problem, firstly, the core multi-model fusion method based on local model is studied. Secondly, the power flexible switching control method based on the core multi-model fusion system is studied. Then, the performance of the core power flexible switching control system is analyzed. Finally, a set of theoretical and numerical procedures for the core power flexible switching control in the full range is established. This project theoretically solves the control problem of core power in full range of variable operating conditions in navigation of marine nuclear power plant. It is important academic and practical significance for the development of the integrated PWR modeling theory and the core power control system of the new generation nuclear power plant.