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Journal Article
Testing the feasibility of multi-modular design in an HTR-PM nuclear plant
2025
Overview
Small modular reactors are the nuclear fission reactors with electric power output less than 300 MWe. To apply the enhanced safety of small modular reactors to build large-scale nuclear plants with any desired power ratings, the multi-modular scheme is recommended to be adopted, where multiple reactor modules are utilized to drive the common load equipment for power generation or cogeneration. The feasibility of multi-modular scheme is not verified until several plant-wide tests were carried out recently on the high temperature gas-cooled reactor pebble-bed module (HTR-PM) nuclear plant. The HTR-PM plant consists of two inherently safe nuclear reactors of 200 MWt, adopts the scheme of two reactor modules driving a common steam turbine, and operates commercially since December 6, 2023. In this paper, the responses of key process variables of HTR-PM plant in the tests of power ramping, turbine trip and reactor trip are provided, and the related multi-modular coordinated control method is also proposed. This result manifests the feasibility of multi-modular scheme practically, and shows the promising future of building large-scale nuclear plants with a system of small modular reactors.
Small modular reactors are compact nuclear reactors that can be combined to create large-scale power plants. Here, authors demonstrate the practical feasibility of a multi-modular design in the HTR-PM nuclear plant, showing effective coordinated control of multiple reactor modules driving a common steam turbine for power generation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
