The Study of Thoron and Radon Progeny Concentrations in Dwellings in Japan
The Study of Thoron and Radon Progeny Concentrations in Dwellings in Japan
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DOI：
10.1093/oxfordjournals.rpd.a081560
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发表时间：
1992-12
影响因子：
1
通讯作者：
Q. Guo;M. Shimo;Y. Ikebe;S. Minato
中科院分区：
文献类型：
--
作者：
Q. Guo;M. Shimo;Y. Ikebe;S. Minato
本文旨在对不同类型住宅中不同浓度的钍气（220Rn）子体和氡气（222Rn）子体进行比较。还估计了钍气和氡子体分别引起的潜在α能量浓度和有效剂量当量。测量在 23 处住宅中进行。结果表明，室内钍气子体浓度可能受到所用建筑材料类型的强烈影响。用泥建造的传统日本建筑物可能具有大约3.52Bq.m-3的高钍气子体浓度以及大约0.5的钍气子体与氡气子体的浓度比。而在混凝土住宅中，钍气子体浓度约为0.72 Bq.m-3，钍气子体与氡气子体的浓度比约为0.1。泥质住宅中钍子体的年有效剂量当量为 1.23 mSv，混凝土住宅中为 0.25 mSv。
This paper aims to make a comparison of different concentrations of thoron (220Rn) progeny and radon (222Rn) progeny in different kinds of dwellings. The potential alpha energy concentrations and the effective dose equivalent caused by thoron and radon progeny, respectively, have also been estimated. The measurements were carried out in 23 dwellings. The results indicate that thoron progeny concentrations indoors might be strongly affected by the type of building material used. Traditional Japanese buildings made with mud may have high thoron progeny concentrations of about 3.52 Bq.m-3and a concentration ratio of thoron progeny to radon progeny of about 0.5. whereas in concrete dwellings thoron progeny concentrations are about 0.72 Bq.m-3and the concentration ratio of thoron progeny to radon progeny is about 0.1. The annual effective dose equivalent of thoron progeny is 1.23 mSv in mud dwellings and 0.25 mSv in concrete dwellings.