Estimation of Ambient Dose Equivalent Rate Distribution Map Using Walking Survey Technique in Hirosaki City, Aomori, Japan

Worawat Poltabtim, Saowarak Musikawan, Arkarapol Thumwong, Yasutaka Omori, Chutima Kranrod, Masahiro Hosoda, Kiadtisak Saenboonruang and Shinji Tokonami ()
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Worawat Poltabtim: Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan
Saowarak Musikawan: Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan
Arkarapol Thumwong: Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
Yasutaka Omori: Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan
Chutima Kranrod: Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan
Masahiro Hosoda: Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan
Kiadtisak Saenboonruang: Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
Shinji Tokonami: Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Honcho, Hirosaki 036-8564, Aomori, Japan

IJERPH, 2023, vol. 20, issue 3, 1-15

Abstract: At present, much emphasis is placed on the health risks associated with radioactivity present in the environment, especially since the accident at the Fukushima Daiichi Nuclear Power Plant. In this study, a walking survey was conducted in Hirosaki City using a NaI(Tl) scintillation spectrometer to estimate and map the distribution of the ambient dose equivalent rate to monitor the radiological safety of the general public in Hirosaki City, where many nuclear facilities are located nearby. The average (±standard deviation) ambient dose equivalent rate was 0.056 ± 0.020 µSv h −1 . By comparison with the measurement data, it was found that the values of 85% of the data obtained using the walking survey technique deviated within ±20% relative to those obtained by spot measurements. Furthermore, the distribution of dose rates obtained in the nighttime survey was not significantly different from those obtained in the daytime.

Keywords: gamma radiation; ambient dose equivalent rate; distribution map; walking survey technique (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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