A numerical model was applied to simulate the transport of 137Cs released with waters which were used cool Fukushima reactors. These stored will be Pacific Ocean according Japanese government plans. The radionuclide is Lagrangian and includes interactions sediments an integrated dynamic foodweb for biota uptake. Calculations made from a conservative approach indicate that expected concentration...

It is now widely accepted that there exists a major dosimetry problem requiring further investigation within the populated regions adjacent to the Semipalatinsk Nuclear Test Site (SNTS). Substantial releases of radioactive fallout from, in particular, the 1949 tests delivered significant doses to inhabitants of certain areas adjacent to the Test Site, notably those in Altai, Russia, and Semipal...

Introduction April 26, 1986, will go into history as the date when the 4th reactor of the Chernobyl Nuclear Power Station exploded causing radioactive contamination of a wide area practically in all Europe. The initial explosions and heat carried volatile radioactive materials up to 1.5 km height from where these materials were transported over large territories. Plumes containing numerous quan...

Spheroidal and fritted particles of three size classes from closein fallout samples collected from Small Boy were separated by hand. Analysis of spheroidal and fritted groups fror the > lU00-u and the 35O-7OO-U size classes showed that spheroidal particles had higher specific activities than the fritted particles; however this difference was less pronounced for the smaller size groups. Contrary...

The atmospheric transport and ground deposition of radioactive isotopes 131I and 137Cs during and after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident (March 2011) are investigated using the Weather Research and Forecasting-Chemistry (WRF-Chem) model. The aim is to assess the skill of WRF in simulating these processes and the sensitivity of the model’s performance to various parame...

Soon after the Chernobyl accident, the radioactive cloud, carrying the nuclides released into the atmosphere, reached Romania and, due to the rainy weather, an important fallout occurred over the Romanian territory. The most important contaminants for Romania were I, Cs, Cs and Sr. As in many other countries, in the first days, I had the main contribution to the irradiation dose released to the...

The Lagrangian Particle Dispersion Model (LPDM) in the 594 km × 594 km model domain with the horizontal grid scale of 3 km × 3 km centered at a power plant and the Eulerian Transport Model (ETM) modified from the Asian Dust Aerosol Model 2 (ADAM2) in the domain of 70° LAT × 140° LON with the horizontal grid scale of 27 km × 27 km have been developed. These models have been implemented to simula...

This paper gives an overview of the research results obtained in 10 years after accident at Fukushima Daiichi Nuclear Power Plant (FDNPP), focusing on distribution and dynamics 137Cs, which is one major accident-derived radionuclides. Immediately FDNPP accident, 8–21 PBq 137Cs was transported to ocean mainly due direct discharge ocean, deposition via atmosphere. seawater traveled eastward surfa...

The aim of the study was to determine activity concentration natural radionuclides (226Ra, 210Po, 228Ra and 40K) artificial radionuclide 137Cs in muscle marine fish species most consumed city São Paulo evaluate annual effective dose due consumption fish. Samples were collected supermarket chain Extra Carrefour distribution center CEAGESP. Six selected among available city: anchovy, tuna, dogfis...