Ambient dose rate in Mikurashima Island after the Fukushima Daiichi Nuclear Power Plant accident

No detailed ambient dose rate has been reported, either before or after the Fukushima Daiichi Nuclear Power Plant (F1-NPP) accident, for Mikurashima Island, one of the islands within the authority of the Tokyo Metropolitan Government. Thus, the ambient dose rate on Mikurashima Island was observed 4.5 years after the F1-NPP accident. A car-borne survey and a foot patrol survey of the ambient dose rates were conducted over the entire island using a 3-in × 3-in NaI(Tl) scintillation spectrometer. The average ambient dose rate was 27 nGy h^-1 (12 – 45 nGy h^-1) and a higher dose distribution was observed for the northern and eastern areas of Mikurashima Island. However, the impact from the F1-NPP accident (i.e., the presence of artificial radionuclides) was mainly observed for the mountain area of the island (4 – 9 nGy h^-1; located about the center to south-southeast direction). Based on the measured ambient dose rate, the estimated annual effective dose after the accident was 0.09 mSv y^-1

Natural Variation of Ambient Dose Rate in Air of Izu-Oshima Island After the Fukushima Daiichi Nuclear Power Plant Accident

The ambient dose rate in air and radioactivity concentration in soil samples collected on Izu-Oshima Island were observed in 2012, 2013 and 2014, i.e., one, two and three years after the severe accident at the Fukushima Daiichi Nuclear Power Plant. A car-borne survey for the ambient dose rate in air was carried out for the entire island. Soil samples were collected for the radioactivity concentration measurements from 22 points. The ambient dose rates in air were 36 nGy h⁻¹ in 2012, 34 nGy h⁻¹ in 2013 and 29 nGy h⁻¹ in 2014, respectively. The corresponding radioactivity concentrations in those years for ¹³⁴Cs were 53 Bq kg⁻¹, 39 Bq kg⁻¹ and 29 Bq kg⁻¹ and for ¹³⁷Cs, 87 Bq kg⁻¹, 73 Bq kg⁻¹ and 75 Bq kg⁻¹. All the values have decreased every year

Imaging Findings in a Case of Bacteremia Caused by Non-Typhoidal Salmonella Associated with a Congenital Venous Malformation

journal articl

Radon and thoron exalation rates and their some correlating factors

11th International Congress of the International Radiation Protection Associatio