Investigation of Control Characteristics for a Molten Salt Reactor Plant under Normal and Accident Conditions

Energies

Chunyu Liu¹  Rafael Macián-Juan¹  Run Luo² 

[1] Chair of Nuclear Technology, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany;School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China;

关键词: molten salt reactor plant;    nonlinear dynamic model;    control system design;    transient characteristics analysis;    normal and accident conditions;   

DOI  :  10.3390/en14175279

来源: DOAJ

【 摘 要 】

A molten salt reactor (MSR) has unique safety and economic advantages due to the liquid fluoride salt adopted as the reactor fuel and heat carrier fluid. The operation scheme and control strategy of the MSR plant are significantly different from those of traditional solid-fuel reactors because of the delayed neutron precursors drift with the liquid-fuel flow. In this paper, a simulation platform of the MSR plant is developed to study the control characteristics under normal and accident conditions. A nonlinear dynamic model of the whole system is built in the platform consisting of a liquid-fuel reactor with a graphite moderator, an intermediate heat exchanger and a steam generator. A new control strategy is presented based on a feed-forward and feedback combined scheme, a power control system and a steam temperature control system are designed to regulate load changes of the plant. Three different types of operation conditions are simulated with the control systems, including transients of normal load-follow operation, a reactivity insertion accident and a loss of flow accident. The simulation results show that the developed control system not only has a fast load-follow capability during normal operation, but also has a good control performance under accident conditions.

【 授权许可】

Unknown