关于一种采用双滤膜法的新型氡及其子体连续监测仪的初步技术探讨

PRELIMINARY TECHNICAL DISCUSSION ON A NEW RADON AND ITS PROGENY CONTINUOUS MONITOR USING TWO-FILTER METHOD.

作者信息

Igarashi Yu, Nozaki Takahiro, Mizuno Hiroyuki, Kuroki Tomohiro, Uchida Yuki, Janik Miroslaw, Iimoto Takeshi

机构信息

Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-City, Chiba, Japan.

Fuji Electric Co., Ltd., Gate City Ohsaki, East Tower, 11-2, Osaki 1-chome, Shinagawa-ku, Tokyo, Japan.

出版信息

Radiat Prot Dosimetry. 2019 Oct 1;184(3-4):418-421. doi: 10.1093/rpd/ncz072.

DOI:10.1093/rpd/ncz072

PMID:31038709

Abstract

Focusing on the scalability of Two-Filter Method, we started to develop a monitor for the concentration of radon and its progeny. In this study, we investigated the influence of a high-humidity environment on measuring radon concentration, and the influence of the decay chamber of the monitor on the measurement. In the high-humidity test, the conversion factor of (Bqm-3)/(cpm) tends to raise with increasing humidity. On the measurement of radon progeny, existence of the decay chamber of the monitor makes measurement sensitivity lower under environments of little aerosols. Radon concentration measurement by the developed monitor could be influenced by environmental humidity, and that counting loss could occur due to deposition of radon progeny inside of the decay chamber. Correction relating these would be needed based on the data of calibration tests.

摘要

着眼于双滤膜法的可扩展性，我们开始研发一种氡及其子体浓度监测仪。在本研究中，我们调查了高湿度环境对氡浓度测量的影响，以及监测仪的衰变室对测量的影响。在高湿度测试中，(Bqm-3)/(cpm)的转换系数往往会随着湿度的增加而升高。在氡子体的测量中，监测仪衰变室的存在会使在气溶胶较少的环境下测量灵敏度降低。所研发监测仪的氡浓度测量可能会受到环境湿度的影响，并且由于氡子体在衰变室内沉积可能会发生计数损失。需要根据校准测试数据进行相关校正。