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Spatial distributions of radionuclides deposited onto ground soil around the Fukushima Dai-ichi Nuclear Power Plant and their temporal change until December 2012
- Source :
- Journal of Environmental Radioactivity. :320-343
- Publisher :
- The Authors. Published by Elsevier Ltd.
-
Abstract
- Spatial distributions and temporal changes of radioactive fallout released by the Fukushima Dai-ichi Nuclear Power Plant accident have been investigated by two campaigns with three measurement schedules. The inventories (activities per unit area) of the radionuclides deposited onto ground soil were measured using portable gamma-ray spectrometers at nearly 1000 locations (at most) per measurement campaign. Distribution maps of the inventories of (134)Cs, (137)Cs, and (110m)Ag as of March, September, and December 2012 were constructed. No apparent temporal change of the radionuclide inventories was observed from March to December 2012. Weathering effects (e.g., horizontal mobility) were not noticeable during this period. Spatial dependence in the ratios of (134)Cs/(137)Cs and (110m)Ag/(137)Cs were observed in the Tohoku and Kanto regions. The detailed maps of (134)Cs and (137)Cs as of September 2012 and December 2012 were constructed using the relationship between the air dose rate and the inventory.
- Subjects :
- Radioactive Fallout
Silver
Fukushima Nuclear Accident
Health, Toxicology and Mutagenesis
Geographic Mapping
Distribution
law.invention
Japan
Radiation Monitoring
law
Nuclear power plant
Soil Pollutants, Radioactive
Environmental Chemistry
Temporal change
Spatial dependence
Fukushima
Waste Management and Disposal
Radioisotopes
Hydrology
Radionuclide
Radioactive fallout
Portable gamma-ray spectrometer
Inventory
Cesium Radioisotopes
General Medicine
In situ measurement
Pollution
Spectrometry, Gamma
Nuclear Power Plants
Radiation monitoring
Environmental science
Seasons
Subjects
Details
- Language :
- English
- ISSN :
- 0265931X
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Radioactivity
- Accession number :
- edsair.doi.dedup.....d20ae18495e235211d90295a8291cf1d
- Full Text :
- https://doi.org/10.1016/j.jenvrad.2014.09.010