压水堆堆顶结构通风方案设计分析方法研究

Research on the Design and Analysis Methods of Ventilation Scheme for Pressurized Water Reactor Head Structure

为进一步缩短换料大修时间以提升核电厂经济性,需要对反应堆堆顶结构的通风方案开展优化改进。针对堆顶结构的通风优化改进涉及多专业的复杂性,为此提出了一套面向正向设计的堆顶结构通风方案设计分析方法。该方法通过建立覆盖各专业需求的需求条目,对优化方案进行影响分析,明确后续需开展的仿真计算和分析工作,最终通过对优化方案的流场及温场仿真分析以论证方案的可行性,并明确后续优化方向。本研究为堆顶结构通风冷却方案的优化提供了系统化的设计分析方法,可推广应用于类似的核电设备优化设计中。

To further shorten the downtime for refueling and maintenance in order to enhance the economic efficiency of nuclear power plants,it is necessary to optimize and improve the ventilation scheme for the reactorhead structure.Considering the complexity involving multiple disciplines in optimizing and improving the ventilation of the head structure,a design analysis method oriented towards forward design has been proposed.This method establishes a list of requirements that cover various professional needs,analyzes the impact of optimization schemes,clarifies subsequent simulation calculations and analysis work that needs to be carried out,ultimately demonstrating the feasibility of the optimized scheme through simulation analysis of flow field and temperature field,and identifying future directions for optimization.This study provides a systematic design analysis method for optimizing ventilation cooling schemes for top structures,which can be widely applied to similar optimization designs in nuclear power equipment.