EVALUATION OF A RADON AIR MONITOR IN THE MEASUREMENT OF RADON CONCENTRATION IN WATER IN COMPARISON WITH A LIQUID SCINTILLATION COUNTER

Author:

Higuchi Shoko1,Kamishiro Yuuki1,Ishihara Maki1,Yasuoka Yumi1,Mori Yasunori2,Hosoda Masahiro3,Iwaoka Kazuki4,Tokonami Shinji3,Takahashi Rikiya5,Janik Miroslaw4,Muto Jun6,Nagahama Hiroyuki6,Mukai Takahiro1

Affiliation:

1. Kobe Pharmaceutical University, Kobe City, Hyogo, Japan

2. Mie Prefecture Health and Environment Research Institute, Yokkaichi City, Mie, Japan

3. Hirosaki University, Hirosaki City, Aomori, Japan

4. National Institutes for Quantum and Radiological Science and Technology, Chiba City, Chiba, Japan

5. Hirosaki University Hospital, Hirosaki City, Aomori, Japan

6. Department of Geoenvironmental Science, Graduate School of Science, Tohoku University Sendai City, Miyagi, Japan

Abstract

Abstract The World Health Organisation (WHO) recommends that the concentration of radon in water should be no more than 100 kBq m−3 (100 BqL−1) and the Codex Alimentarius Commission states that the limit of quantification (LOQ) of a method should be no more than one-fifth of this value. In this study, a degassing method with an RAD7 device was used to measure radon concentrations in water, compared to a liquid scintillation counter (LSC) method used as the reference, to investigate whether the numerical value of the LOQ of this method was more than 1/5 (20 kBq m–3) of 100 kBq m–3. The degassing method with leak prevention was shown to reach a target value of 20 kBq m−3 or less under a relative humidity of 6% or lower in the chamber of the RAD7 device. Accordingly, the RAD7 degassing method with leak prevention can be used to accurately measure radon concentrations in water within the guidance level set out by the WHO.

Funder

Ministry of Education, Culture, Sports, Science and Technology

Earthquake and Volcano Hazards Observation and Research Program

Publisher

Oxford University Press (OUP)

Subject

Public Health, Environmental and Occupational Health,Radiology Nuclear Medicine and imaging,General Medicine,Radiation,Radiological and Ultrasound Technology

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