Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (8): 80602-080602.doi: 10.11889/j.0253-3219.2018.hjs.41.080602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles    

The modification of high temperature thermal stability of molten salt by molten salt additives

WAN Zhikang1,2, AN Xuehui2, ZHANG Peng2, YAN Liuming1, WANG Wenfeng2, CHENG Jinhui2   

  1. 1. Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China;
    2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
  • Received:2018-03-05 Revised:2018-05-10 Online:2018-08-10 Published:2018-08-15
  • Supported by:

    Supported by National Natural Science Fund Youth Fund (No.21406256), Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02002400)

Abstract:

[Background] The molten salt is used as the coolant of the molten salt reactor because of its stable chemical properties and excellent heat transfer performance. At the same time, the thermal stability of the molten salt also determines the stability of the molten salt reactor (MSR). In this paper, the effect of additives on the thermal stability of molten salt at high temperature was studied by selecting Solar salt (NaNO3-KNO3, 60%(wt)~40%(wt)) molten salt as a base salt and Na2CO3 as an additive.[Purpose] This study aims to improve the working temperature range and high temperature thermal stability of Solar salt molten salt.[Methods] The effect of Na2CO3 on the working temperature range and thermal stability of Solar salt was studied by the simultaneous thermal analysis and the mass loss rate-time curve. The decomposition products of Solar salt were verified by chemical analysis and pH analysis.[Results] By adding 1%(wt) Na2CO3, the working temperature range and thermal stability of the Solar salt molten salt were improved by 20 degree celsius and 3.2%, respectively.[Conclusion] This study can provide a reference to the improvement of high temperature thermal stability of molten salt in MSR.

Key words: Solar salt, Thermal stability, Molten salt reactor

CLC Number: 

  • TL99