Environmental gamma-ray dose rate in Aomori Prefecture, Japan

Health Physics
Takashi IyogiNobuo Tsuji

Abstract

Japan's first commercial nuclear fuel cycling facilities, including a spent nuclear fuel reprocessing plant, are now under construction in Rokkasho, Aomori Prefecture (prefecture--an area of administration similar to a county in the U.S.). The reprocessing plant is due to be completed by 2004. We surveyed indoor and outdoor environmental gamma-ray dose rates throughout Aomori Prefecture from 1992 to 1996 to get background data before operation of the plant. Glass dosimeters were used to measure cumulative gamma-ray dose rate. The outdoor gamma-ray dose rates were measured at 109 locations in the prefecture. The indoor gamma-ray dose rates were measured at 81 locations, which were generally in a dwelling near the location of an outdoor measurement. The contribution of radionuclides in the ground to the outdoor dose rate was estimated by using in-situ gamma-ray spectrometry with a germanium detector. The spectra were measured at 20 locations used for the glass dosimeter measurements. The outdoor gamma-ray dose rate was higher in the Tsugaru area (western part of the prefecture) than in the Nanbu area (eastern part). Means of the dose rate were 28, 31, and 25 nGy h(-1) for the whole prefecture and Tsugaru and Nanbu areas, respecti...Continue Reading

Citations

Mar 28, 2003·Journal of Environmental Radioactivity·T IyogiJ Inaba
Apr 2, 2016·Journal of Environmental Radioactivity·Norihiro MatsudaKimiaki Saito
Jan 10, 2006·The Science of the Total Environment·T IyogiJ Inaba
Dec 3, 2014·Journal of Environmental Radioactivity·E WarneryJ Guillevic
Feb 17, 2005·Radiation Protection Dosimetry·S BillonD Laurier
May 8, 2019·Environmental Geochemistry and Health·Mohammad Hossien SaghiAbdolazim Alinejad
Feb 8, 2020·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Yasutaka OmoriMasahide Furukawa

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