Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (03): 30601-030601.doi: 10.11889/j.0253-3219.2014.hjs.37.030601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Physical-property study on liquid fluoride-salt-cooled high temperature reactor loaded with different kinds of fuel mixtures

CHEN Liang1,2 CHEN Jingen2 LI Xiaoxiao2 CAI Xiangzhou2 SUN Jianyou1,2 JIANG Dazhen2 YAO Zeen1   

  1. 1(School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China) 2(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China)
  • Received:2013-10-12 Revised:2013-12-24 Online:2014-03-10 Published:2014-03-14

Abstract:

Background: Liquid fluoride-salt-cooled high temperature reactor, one of the GEN-IV reactors, has great advantages comparatively, and the research on its fuel is of great significance. Purpose: The aim is to study the physical properties of high-temperature pebble-bed reactors loaded with six different fuel mixtures. Methods: We used SCALE5.1 package to compute some important parameters like excess reactivity, full power operation days, burnup and neutron spectrum. Results: The results show that the true conversions of 232Th are much less than those of 238U when mixed with 233U or 235U. With 239Pu for starting, 232Th contributes to making the reactor running longer than that with 238U. Conclusion: With respect to saving fuel and extending the life of the core, without online refueling and reprocessing, 232Th is underperformed in thermal reactor compared with 238U, however, it is the opposite in epithermal neutron reactor.

Key words: High-temperature reactor, Pebble-bed reactor, Pebble, TMSR (Thorium Molten-Salt Reactor), Epithermal neutron reactors