Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (7): 0-070601-6.doi: 10.11889/j.0253-3219.2019.hjs.42.070601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING •    

Distribution of atmospheric multi-forms tritium in the vicinity of Qinshan nuclear power plants

Qingsong XU1,2,Lailai QIN2(),Zhenghai XIA3,Zhongqin DAI4,Wei LIU2,Taijun PAN1()   

  1. 1. School of Material Science and Engineering, Jiangsu Key Laboratory of Material Surface Technology, Changzhou University, Changzhou 213164, China
    2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    3. China National Nuclear Corporation, Nuclear Power Operations Management Co. , Ltd, Haiyan 314300, China
    4. Wuhan University, Wuhan 430072, China
  • Received:2019-04-08 Revised:2019-05-20 Online:2019-07-10 Published:2019-07-16
  • Contact: Lailai QIN,Taijun PAN E-mail:qinlailai@sinap.ac.cn;tjpan@cczu.edu.cn
  • About author:XU Qingsong, male, born in 1991, graduated from Jinling Institute of Technology in 2015, master student, focusing on distribution of atmospheric multi-forms tritium concentration

Abstract: Background

The harmfulness of tritium to environment and human life is not only related to the activity of tritium, but also to the chemical forms of tritium. Qinshan nuclear power plants base is one of the largest tritium-processed areas in China, but little attention has been paid to the distribution of atmospheric multi-forms tritium in this area.

Purpose

This study aims to investigate the distribution characteristics of atmospheric multiform tritium in the vicinity of Qinshan nuclear power plants.

Methods

Samples of tritium in different forms around the vicinity of Qinshan nuclear power plants in different years and seasons were collected and measured using instruments independently developed by Shanghai Institute of Applied Physics.The temporal and spatial distribution characteristics of HTO concentration and the seasonal discharge of three forms of atmospheric trituim were both discussed.

Results

The results showed that three chemical forms of atmospheric tritium existed in the vicinity of Qinshan nuclear power plants. The average concentration of HTO (tritiated water) in the atmosphere is 78.24~8 324.16 mBq?m-3; the concentrations of HT (tritiated hydrogen) and CH3T (tritiated methane) in the sampling period were 15.35~2 763.12 mBq?m-3 and 5.68~163.96 mBq?m-3, respectively.

Conclusion

The concentration of HTO in the atmospheric increased with the time of operation of the nuclear power plant and decreased gradually with the increase of the distance from the heavy water reactor; the concentration of HTO and HT presented apparent seasonal distribution: high in summer and low in winter; however the concentration of CH3T showed no obvious seasonal variations.

Key words: HTO, HT, CH3T, Concentration, Qinshan nuclear power plants base

CLC Number: 

  • TL99