Study on distribution of different forms of tritium in grassland around Qinshan nuclear power station

Qin ZHANG; Lin DU; Zhaowei MA; Guo YANG; Fei WEI; Mingjun ZHANG; Wei LIU

doi:10.11889/j.0253-3219.2018.hjs.41.120601

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Study on distribution of different forms of tritium in grassland around Qinshan nuclear power station

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- Study on distribution of different forms of tritium in grassland around Qinshan nuclear power station
  封面论文
- NUCLEAR TECHNIQUES Vol. 41, Issue 12, Article number: 120601(2018)
- 作者机构：
  
  1.中国科学院上海应用物理研究所上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;National Natural Science Foundation of China;National Natural Science Foundation of China
- DOI：10.11889/j.0253-3219.2018.hjs.41.120601
  CLC： TL751
- Received：20 July 2018，
  
  Revised：01 October 2018，
  
  Published：10 December 2018
- 稿件说明：
移动端阅览
Qin ZHANG, Lin DU, Zhaowei MA, et al. Study on distribution of different forms of tritium in grassland around Qinshan nuclear power station[J]. Nuclear techniques, 2018, 41(12): 120601
DOI：

Qin ZHANG, Lin DU, Zhaowei MA, et al. Study on distribution of different forms of tritium in grassland around Qinshan nuclear power station[J]. Nuclear techniques, 2018, 41(12): 120601 DOI： 10.11889/j.0253-3219.2018.hjs.41.120601.

摘要

氚是核设施运行过程中排放的放射性物质之一，植物和土壤是氚参与生态循环的组成部分。核设施周围植物和土壤中氚的分布可以用来判断核设施的短期和长期排放情况，本文测定了2015~2016年秦山核电站周围环境的草和表层土壤中的不同形态的氚活度。草中组织自由水氚（Tissue Free Water Tritium，TFWT）和表层土壤中的氚化水（HTO）在主风方向上离核设施越远其活度值越小。对比两年的采样结果，草中有机氚（Organically Bound Tritium，OBT）活度的总量大体相同，分布情况大体一致。表层土壤中的OBT分布与HTO和草中的OBT均不相同。表层土壤中OBT/HTO的比值明显高于草中的相应值，表明土壤中OBT与草中OBT的来源、形成过程、迁移转换等都有所差别。

Abstract

Background

Tritium is one of emitted radioactive materials during the operation of nuclear facilities. Plants and soil are parts of the tritium ecological cycle. The distribution of tritium in plants and soil around nuclear facilities can be used to determine the short-term and long-term emissions of nuclear facilities.

Purpose

This study aims to analyze activities of tissue free water tritium (TFWT) and OBT in grasses and surface soils around Qinshan nuclear power station

and obtain the influence of the tritium emissions from Qinshan nuclear power station on the environment.

Methods

Tritium activities of different forms (HTO

TFWT and OBT) in grasses and surface soils around the Qinshan nuclear power station were sampled in several sites around Qinshan nuclear power station and stored in strict conditions during two years period from 2015 to 2016. Liquid Scintillation Counting (LSC) was employed to measure the tritium activity three times for samples collected in the same site.

Results

In the prevailing wind direction

the longer distance apart from the nuclear facility

the lower activities of TFWT in the grass and the tritiated water (HTO) in the surface soil. In the two-year grass samples' results

the total amount of OBT was in the same level and distribution of OBT was consistent. The OBT distribution in the surface soil was different from the HTO in the surface soil and the OBT in the grass. The ratio of OBT/HTO in the surface soil was significantly higher than the ratio in the grass

indicating that the source

formation

migration and transformation of OBT in the soil was different from those in the grass.

Conclusion

The HTO activity in surface soil and TFWT activity in grassland can reflect the short-term tritium emissions from nuclear power plant. Meanwhile

the OBT activity in grassland can reflect the long-term tritium emissions from nuclear power plant.

关键词

Keywords

references

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