A5092538262- Radioactive contamination and transfer
- Radiation Detection and Scintillator Technologies
- Radioactivity and Radon Measurements
- Nuclear and radioactivity studies
- Radioactive element chemistry and processing
- Groundwater and Isotope Geochemistry
- Chemical Synthesis and Characterization
- Geochemistry and Geologic Mapping
- Chemical Reactions and Isotopes
- Radiation Dose and Imaging
Hirosaki University
2023-2025
Abstract The combustion process of the organically bound tritium (OBT) analysis method is difficult and requires sophisticated techniques. For ease, safety, reproducibility a semi-automatic system was developed. An arbitrary program that prevents sudden ignition devised tests were conducted. Analytical test runs conducted using fish standard samples to confirm validity developed system. values compared with obtained another method, recovery rate water evaluated. results confirmed analytical...
Since 2014, an educational activity on radiation and health in northern Japan has been carried out by young scientists, the so-called 'Educational Symposium Radiation Health (ESRAH)'. Close cooperation continued preparing for any possible emergency response to accidents because several facilities, e.g., Tomari Nuclear Power Plant Hokkaido Low-Level Radioactive Waste Disposal Facility Aomori prefecture. The ESRAH meeting provided informational exchange discussion forum a broad range of...
Abstract This study aimed at understanding the background concentration level of tritium in precipitation southern Japan, where samples were collected monthly 2022 Okinawa and Kagoshima. Tritium since 2014 ranged from 0.05 to 0.39 Bq per L with mean value (2015–2022) 0.15 ± 0.06 L. That Kagoshima < 0.11 0.58 0.30 0.13 Our observed values summarized reported values, which a clear latitude effect for was found Japan.
Abstract To understand the regional properties of atmospheric 7Be and 210Pb concentrations at Hirosaki, aerosol samples were collected weekly for investigation. Total suspended particles (TSP) concentration ranged from 0.14 to 1.19 mg m−3 with a mean value 0.29 ± 0.08 m−3. The activity during observation period have shown similar trend between 210Pb, comparable reported studies. 0.46 4.94 mBq an average 2.22 0.26 1.29 0.64 m−3, respectively. relation precipitation radionuclide indicated that...
Abstract The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident created large stockpiles of tritium containing cooling water, which is to be gradually released into the Pacific Ocean, gaining attention from surrounding countries, environmental groups, and local residents concerned with possibility increasing concentrations in water food cycle. Establishing baseline concentration levels monitoring immission values are important for assuring public safety, providing data scientific...
Abstract This article mainly discusses tritium concentrations in monthly precipitation at Hiroshima City during 2021. The concentrations, which were measured with a low background liquid scintillation counter, fluctuated from 0.16 to 0.78 Bq L−1. Additionally, hydrogen and oxygen stable isotopes ionic species order characterize precipitation, their trends including compared data collected other regions of Japan previous studies. Although the results showed characteristics similar those...
Abstract The concentration of the radioactive cesium (134Cs and 137Cs) in soils atmospheric fallouts has been measured at Koriyama campus, Nihon University, after Fukushima Dai-ichi Nuclear Power Plant accident for 13 y, from October 2011 till September 2023 now ongoing. them decreased very rapidly due to decontamination activities weathering effects, with an environmental half-life 1.21 2.82 y soils, those 1.58 2.08 134Cs 137Cs, respectively. behavior decrease was not simple, particles...