Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (2): 20403-020403.doi: 10.11889/j.0253-3219.2019.hjs.42.020403

Previous Articles     Next Articles

Development of a new SPE electrolytic enrichment instrument for tritium in water samples

Wentao CHEN,Ruidong ZHOU(),Qing LIN,Jiayue WANG,Fei DENG,Qiaoqin LI   

  1. 1. Guangdong Environmental Radiation Monitoring Center, Guangzhou 510300, China
  • Received:2018-06-28 Revised:2018-12-29 Online:2019-02-10 Published:2019-02-19
  • Contact: Ruidong ZHOU E-mail:417371437@qq.com
  • About author:CHEN Wentao, male, born in 1985, graduated from South China University of Technology in 2010, engineer, focusing on monitoring technology and evaluation of radiation environmental|CHEN Wentao, male, born in 1985, graduated from South China University of Technology in 2010, engineer, focusing on monitoring technology and evaluation of radiation environmental|ZHOU Ruidong, E-mail:<email>417371437@qq.com</email>

Abstract: Background

The 3H activity concentration of most water samples in environment is lower than the detection limit of commonly used liquid scintillation measurement method. In order to measure the 3H activity concentration accurately, we need to enrich tritium from water sample.

Purpose

This study aims to develop an electrolytic enrichment instrument to meet the needs of daily environmental tritium analysis work.

Methods

First of all, influence factors of tritium in electrolytic concentration process were analyzed, then a new solid polymer electrolyte (SPE) electrolytic enrichment instrument was developed on the basis of the research and design of key components at Guangdong environmental radiation monitoring center (GERC). Finally, a series of experiments have been carried out on its comprehensive performance and the patent of the instrument has been obtained by GERC.

Results

After electrolytic enrichment, the detection limit of tritium in 700 mL water sample can be reduced to 0.09 Bq?L-1, more than 10 times lower than that before enrichment, hence greatly improves the tritium detection capability.

Conclusion

This instrument has features of stable performance, long life, good safety, high electrolytic efficiency, high enrichment multiple, accurate control and good experience, it can be used in environmental protection, geology, hydrology, ocean, health, nuclear power and other fields.

Key words: Tritium, Electrolytic enrichment, Develop, Solid polymer electrolyte

CLC Number: 

  • TL812.2