一体化水堆内置式控制棒水压驱动技术研究

In-vessel control rod hydraulic drive mechanism for integrated water reactors

|安全性和经济性满足较小功率用户需求的小型核反应堆为近年来的研究热点,一体化布置水冷反应堆为小型核反应堆的主要堆型之一。核反应堆控制棒驱动机构是反应堆最关键的安全设备,担负着反应堆的启动、功率调节及停堆等重要功能。该文给出一种应用于一体化布置水冷反应堆的内置式控制棒水压驱动技术,包括功率小于50 MW的A型和热功率50~300 MW的B型2种整体设计方案、部件组成、主要功能和性能等工程研究和应用。为一体化水堆提供了完整的内置式控制棒驱动线,包括其部件组成、联接结构、固定方式和功能;降低了反应堆高度;避免了弹棒事故,增强了反应堆安全性;使一体化布置反应堆更加紧凑、体积小、自然循环能力加强。

In recent years,many researchers have focused on small nuclear reactors that provide good economics and safety characteristics for small users with the integrated water reactor as one of the main reactor types for small nuclear reactors.The control rod drive mechanism is a key component during reactor startup,power regulation and shutdown.This paper describes an in-vessel type control rod hydraulic drive mechanism for integrated water reactors,including the structure,the components,the main functions and the performance.Type A is designed for reactors with power levels less than 50 MW with type B for 50~300 MW reactors.This study provides a complete in-vessel type control rod drive line for integrated water reactors including the components,connecting structures,modes and functions that reduce the reactor height,prevent the control rod ejection accident and enhance the reactor safety to make the integrated water reactor more compact with natural circulation.