Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (7): 70604-070604.doi: 10.11889/j.0253-3219.2017.hjs.40.070604

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Development of high-temperature in situ infrared absorption instrument used for molten fluoride salts

LIU Shuting1,2, SU Tao1, ZHANG Peng1, LIU Hongtao1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-04-19 Revised:2017-05-05 Online:2017-07-10 Published:2017-07-10
  • About author:10.11889/j.0253-3219.2017.hjs.40.070604
  • Supported by:
    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02002400), National Natural Science Foundation of China (No.51506214)

Abstract: Background: Molten fluoride salts which havegood heat transfer and neutron characteristic, were used as the primary and secondary coolants in the loops of thorium molten salt reactor (TMSR) that is a candidate of the generation IV reactor. Structure of molten salt plays an important role in the design, construction and safe operation of molten salt reactor. Infrared absorption spectroscopy (IR)is one of the powerful tools to study the structure of molten salt. However, the commercial standard instrument cannot realize high temperature measurement. Purpose:This study aims to obtain the infrared absorption spectra of molten fluoride salt at the temperature upto 600 ℃ by developing an instrument constructed from commercially available components. Methods: The main component of instrument is a Fourier transformation infrared (FTIR) spectrometer with wavenumber range of 14700-400 cm-1.Adetachable bottom board in sample compartment was built to allow a furnace to be put in it. The furnace was designed to be two-half pattern for the cuvette to be placed into and out of freely. It can be operated from room temperature to about 600℃. The cuvette, the most important component in the instrument, is made by Hastelloy C/N as the main body with a reverse‘T’contour and diamond or crystalline SiC as the window plates. An optical translation stage was installed under the furnace to connect the furnace with the bottom board, which can make sure that the focus of light beam is overlapped with the center of cuvette. Results: Performances of the instrument are demonstrated and verified with spectral studies of water at room temperature and molten salt nitrite at high temperature. Conclusion:Using this instrument, the spectra of the molten fluoride salt (FLiBe)have been obtained.

Key words: TMSR, Molten fluoride salts, High-temperature IR, Structure investigation

CLC Number: 

  • TL99