Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (3): 030602 doi: 10.13538/j.1001-8042/nst.25.030602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles    

Analysis on reactivity initiated transient from control rod failure events of a molten salt reactor

CAI Jun, XIA Xiao-Bin, CHEN Kun, MEI Mu-Dan, WANG Jian-Hua   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Contact: XIA Xiao-Bin E-mail:xiaxiaobin@sinap.ac.cn
CAI Jun, XIA Xiao-Bin, CHEN Kun, MEI Mu-Dan, WANG Jian-Hua. Analysis on reactivity initiated transient from control rod failure events of a molten salt reactor.Nuclear Science and Techniques, 2014, 25(3): 030602     doi: 10.13538/j.1001-8042/nst.25.030602

Abstract:

In a molten salt reactor (MSR), the fuel is dissolved in fluoride salt. In this paper, the reactivity worth and reactivity initiated transient of Molten-Salt Reactor Experiment (MSRE) in the control rod failure events are analyzed. The point kinetic coupling heat-transfer model with decay character of six-group delayed neutron precursors due to the fuel motion is applied. The relative power and temperature transient under reactivity step and ramp initiated at different power levels are studied. The results show that the reactor power and temperature increase to a maximum, where they begin to decrease to stable values. Comparing with full power level, the transient result at low power level is more serious. The results are of help in our study on safety characteristics of an MSR system.

Key words: Reactivity initiated transient, Fluid fuel, Molten-salt reactor experiment