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

Run Luo, Chunyu Liu and Rafael Macián-Juan
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Run Luo: School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China
Chunyu Liu: Chair of Nuclear Technology, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany
Rafael Macián-Juan: Chair of Nuclear Technology, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany

Energies, 2021, vol. 14, issue 17, 1-23

Abstract: 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.

Keywords: molten salt reactor plant; nonlinear dynamic model; control system design; transient characteristics analysis; normal and accident conditions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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