南宁市地铁1号线地铁站内氡活度浓度调查

辐射防护 ›› 2019, Vol. 39 ›› Issue (6): 463-468.

南宁市地铁1号线地铁站内氡活度浓度调查

王竟博¹, 鞠志萍^*2, 黄伊林², 于慧君², 许明发², 冯亮亮², 郭秋菊¹

1.北京大学物理学院核物理与核技术国家重点实验室,北京 100871;
2.广西壮族自治区辐射环境监督管理站,南宁 530222

收稿日期:2019-01-19 出版日期:2019-11-20 发布日期:2020-05-15
通讯作者: 鞠志萍。E-mail:juzhp2009@126.com
作者简介:王竟博(1997—),男,北京大学物理学院15级辐射防护与环境保护专业本科生。E-mail:wangjingbo@pku.edu.cn
基金资助:
南宁市科学研究与技术开发计划-重点研发计划资助(合同编号:20163357)。

Survey on radon activity concentration of underground metro station in Nanning city

WANG Jingbo¹, JU Zhiping², YU Huijun², XU Mingfa², FENG Liangliang², GUO Qiuju¹

1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University,Beijing 100871;
2. Environmental Protection Monitoring Station, Nanning 530222

Received:2019-01-19 Online:2019-11-20 Published:2020-05-15

摘要/Abstract

摘要： 本研究采用以CR-39为探测元件的被动式累积测氡杯对广西省南宁市地铁1号线25个地铁站进行了为期一年的氡活度浓度累积测量。为确保测量结果准确性,采用CR-39暴露本底代替裸片本底,并在操作上将提供暴露本底的本底测氡杯始终置于密闭真空状态,进行了严格的质量控制。测量结果显示,25个地铁站全年平均氡活度浓度为(13.9±3.7)Bq/m³;分布范围是(6.4～32.9)Bq/m³。冬季平均氡活度浓度(18.1±2.2 Bq/m³)明显高于春(12.7±1.9 Bq/m³)、夏(12.9±3.5 Bq/m³)、秋(12.4±4.4 Bq/m³)三季;没有观察到地下一层和地下二层氡活度浓度水平有统计学意义的显著差异;没有观察到各地铁站之间氡活度浓度有统计学意义的显著差异。

关键词: 南宁, 地铁站, 氡活度浓度, CR-39, 质量控制

Abstract: Subway has become one of the most important traffic tools for the public in nearly all the provincial capital cities in China. To confirm the radiation safety in this special underground spaces, a one-year survey of radon activity concentration measurement was carried out in all metro stations at Line-one. Totally 25 stations were involved. Passive integrated radon cup monitor with CR-39 as a detector was adopted for radon integrated measurement. For measurement quality control, the background track density of CR-39 was strictly defined and controlled during operation of the survey. The annual average radon activity concentration of all the 25 stations is (13.9±3.7) Bq/m³ range from 6.4 to 32.9 Bq/m³. For seasonal variation, radon activity concentration in winter was obviously higher than the other three seasons. It was (18.1±2.2) Bq/m³. For Spring, Summer and Autumn, they were (12.7±1.9), (12.9±3.5) and (12.4±4.4) Bq/m³ respectively. Comparisons of different stations and different floors were also performed and no statistically significant difference was observed.

Key words: Nanning city, metro station, radon activity concentration, CR-39, quality control

中图分类号:

X837

王竟博, 鞠志萍, 黄伊林, 于慧君, 许明发, 冯亮亮, 郭秋菊. 南宁市地铁1号线地铁站内氡活度浓度调查[J]. 辐射防护, 2019, 39(6): 463-468.

WANG Jingbo, JU Zhiping, YU Huijun, XU Mingfa, FENG Liangliang, GUO Qiuju. Survey on radon activity concentration of underground metro station in Nanning city[J]. RADIATION PROTECTION, 2019, 39(6): 463-468.

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