Abstract：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.
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2021, Vol. 61 
