Indoor Thoron and Radon Concentrations in Zhuhai, China

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概要

• 論文の詳細を見る

• A field survey of 54 dwellings and 21 points outdoors around Zhuhai area was carried out using a newly developed integrating monitor in the spring of 2001 for a preliminary exposure assessment on 222Rn and 220Rn progeny, focusing especially on 220Rn progeny levels and its contribution to the general public. The flux rates of 222Rn and 220Rn from ground soil and soil nuclide contents were measured simultaneously. The average EECRn and EECTn were 52.9±39.1 Bq·m−3 and 4.0±2.3 Bq·m−3 for dwellings and 7.5±3.6 Bq·m−3 and 0.6±0.2 Bq·m−3 for outdoor air, respectively. Rather high 220Rn flux rates from ground surface were measured, the mean value was 2,645.1±1,667.6 mBq·m−2·s−1. The estimated radiation exposures from the exhalation of 222Rn and 220Rn progeny were 3.3 mSv·a−1 and 1.1 mSv·a−1, respectively. The exposure from 220Rn progeny was some 1/3 that of 222Rn progeny, and ought not to be ignored from the viewpoint of radiation protection in Zhuhai area.

• 一般社団法人 日本原子力学会の論文
• 2005-06-25

著者

• GUO Qiuju

  Department of Nuclear Engineering, School of Engineering, Nagoya University

• CHENG Jianping

  Department of Engineer Physics, Tsinghua University

• Cheng Jianping

  Dep. Of Engineering Physics Tsinghua Univ.

関連論文

• Measurements of Thoron Concentration by Passive Cup Method and Its Application to Dose Assessment
• Potential of High Thoron Exposure in China
• Feasibility for Mapping Radon Exhalation Rate from Soil in China
• Indoor Thoron and Radon Concentrations in Zhuhai, China
• The Levels of Indoor Thoron and Its Progeny in Four Areas in China
• The Effect of Some Soil Characteristics on Soil Radon Concentration and Radon Exhalation from Soil Surface
• A Brief Introduction on the Current Situation of Radiation Protection in China
• Radon Levels in China
• Preliminary Research for Mutual Dose Perturbation Influence of ^I Brachytherapy Source

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