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Hosoda, Masahiro; Ishikawa, Tetsuo; Nakamura, Yuuya; Tokonami, Shinji

doi:10.5453/jhps.43.349

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…A radon research study conducted in twenty dwellings in Kumamoto city showed that the average radon concentration was 30 Bq m −3 , ranging from 13 to 93 Bq m −3 [96].…”

Section: Japan (Ii)mentioning

confidence: 99%

Indoor Radon Research in the Asia-Pacific Region

Janik¹,

Bossew

Hasan

et al. 2023

Atmosphere

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Indoor radon is a major hazard to human health; it is one of the leading causes of lung cancer. Therefore, radon research in Asia has intensified recently due to the growing awareness of the harm that radon poses. An analysis of the collected literature data showed that in Asia–Oceania, some regions have—or are believed to have—little indoor radon problems due to climate and low Rn ground. It can be concluded that countries have their own approaches, techniques, and protocols. Data were not harmonized within each region; however, measurement techniques were compared by regional intercomparison exercises. The situation differs regarding studies on the usability of radon as a tracer or potential predictor of tectonic phenomena, as some countries are in seismically active zones, such as India, Taiwan, China, Japan, etc. India and Taiwan are global leaders in this research, as well as Italy, which is another seismically affected country. We provide an overview of radon-related surveying and research activities conducted in the western, southern, and eastern Asian regions over the past few years. Additionally, we observed that the number of indoor radon measurements per million inhabitants increases as the human development index (HDI) increases.

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“…A radon research study conducted in twenty dwellings in Kumamoto city showed that the average radon concentration was 30 Bq m −3 , ranging from 13 to 93 Bq m −3 [96].…”

Section: Japan (Ii)mentioning

confidence: 99%

Indoor Radon Research in the Asia-Pacific Region

Janik¹,

Bossew

Hasan

et al. 2023

Atmosphere

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Anomalously High Radon Concentrations in a Dwelling in Okinawa, Japan

Kranrod

Tokonami²,

Ishikawa³

et al. 2009

RADIOISOTOPES

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Short term measurements of indoor radon concentrations were made in a dwelling in Okinawa, Japan, in which high radon concentrations had been observed in a previous nationwide indoor survey. Measurements were carried out in 4 locations : the bedroom, living room and outdoors. In this study, anomalously high radon concentrations were observed in the 1st floor bedroom and the mean radon concentration averaged about 400 during the observation period, much higher than Japan's annual average of 15.5. A diurnal pattern of extreme fluctuation was found. Furthermore, there was a noticeable spatial distribution of indoor radon concentrations.

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Environmental Radiation Monitoring and External Dose Estimation in Aomori Prefecture after the Fukushima Daiichi Nuclear Power Plant Accident

Hosoda

Inoue

Oka³

et al. 2016

Jpn. J. Health Phys.

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Many nuclear facilities are located within Aomori Prefecture, Japan. However, no detailed dose rate distribution map of Aomori Prefecture, including its mountain regions has been reported since the Fukushima Daiichi Nuclear Power Plant accident. A car-borne survey which used a 3-in × 3-in NaI(Tl) scintillation spectrometer was carried out throughout the prefecture for the purposes of making a dose distribution map and estimating the annual external dose. The average absorbed dose rate in air and the annual effective dose were found to be 22 ± 5 nGy h -1 and 0.20 ± 0.08 mSv, respectively. These average values for all of Aomori Prefecture were respectively 44% and 59% of the nationwide average values. The average values with standard deviations of activity concentrations in soil of Cs to the absorbed dose rates in air were judged to be negligible.KEY WORDS: absorbed dose rate in air, annual effective dose, car-borne survey, Aomori Prefecture, activity concentration, potassium-40, uranium-238, thorium-232, dose rate distribution map.

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Untitled

Cited by 3 publications

References 9 publications

Indoor Radon Research in the Asia-Pacific Region

Indoor Radon Research in the Asia-Pacific Region

Anomalously High Radon Concentrations in a Dwelling in Okinawa, Japan

Environmental Radiation Monitoring and External Dose Estimation in Aomori Prefecture after the Fukushima Daiichi Nuclear Power Plant Accident

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