Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (9): 90503-090503.doi: 10.11889/j.0253-3219.2018.hjs.41.090503


Preparation of liquid scintillation sample for lithium carbonate pellet for tritium production rate measurement

JIANG Bing1,2, YAO Zeen2, WEN Wei1, HE Tie1, ZHAO Guangyi1, AN Li1   

  1. 1 Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China;
    2 School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2018-04-02 Revised:2018-06-05 Online:2018-09-10 Published:2018-09-12
  • Supported by:
    Supported by National Special Magnetic Confinement Fusion Energy Research (No.2015GB108000), Experimental Study on Neutronic Performance in High Gain Fusion Breeder Blanket Module (No.2015GB108006)

Abstract: [Background] The measurement of tritium production rate for tritium breeding blanket is one of the important issues that to be studied in fusion nuclear power system.[Purpose] A preparation method of liquid scintillation sample for lithium carbonate probe was developed for the measurement of tritium production rate.[Methods] & [Results] The results showed that the method of dissolution of lithium carbonate by hydrochloric acid can produce high transparency and no liquid scintillation sample layer.[Conclusion] Compared to other mixed acid treatments, this method reduces the steps for finding the optimum volume ratio of the mixed acid, and simplifying the preparation of liquid scintillation samples of lithium carbonate pellets. The study of the refining process shows that in a 20 mL liquid scintillation measuring vial, the volume of liquid scintillation fluid is at least 10 mL and the volume of hydrochloric acid should not exceed 0.2 mL for the volume of hydrochloric acid which can just dissolved the lithium carbonate pellet. The compatibility of the liquid sample prepared by this method is stable for a long time, but the degree of quenching will vary. The effect of quenching changes on tritium measurement should be taken into account.

Key words: Tritium production rate, Lithium carbonate pellet, The preparation of liquid scintillation sample, Compatibility, Stability

CLC Number: 

  • TL812.2