background: a few elements of soil are radioactive. soil can transfer radionuclide into plants feeding human. sometimes their   levels are as high as to be concern of human healthy. rice has an important share for iranian foods especially in north of iran. therefore we decided to obtain radionuclides concentration emitting g rays in lahijan city (northern iran) rice fields using g spectroscopy....

4 Abstract Risk assessment models for the soil-to-plant transfer of radionuclides rely on the assumption that soils are homogenously contaminated. However, field soils are characterized by a high degree of heterogeneities mainly caused by macro-structure which can affect the distribution of surface-applied radionuclides and their accessibility by plant roots. The main objective of this thesis w...

BACKGROUND The distribution of radionuclides occurring naturally in the earth depends on bedrock characteristics. Therefore, the spatial distribution of radionuclides is not uniform. Consequently, radionuclide information is vitally important in determining and monitoring the spatial variation of the radionuclide concentrations that are over the limits for the sustainable environment and human ...

Numerous sites worldwide have been identified as having significant radioactive contamination, either as a result of routine or accidental releases. The radiological impact of this contamination depends on the extent to which the radionuclides are taken up by organisms, including humans. The mobility, and thus availability, of the radionuclides is greatly determined by the physico-chemical form...

The Fukushima Dai-ichi release of radionuclides into ocean waters caused significant local and global concern regarding the spread of radioactive material. We report unequivocal evidence that Pacific bluefin tuna, Thunnus orientalis, transported Fukushima-derived radionuclides across the entire North Pacific Ocean. We measured γ-emitting radionuclides in California-caught tunas and found (134)C...

Exposure to radioactive elements or having them through drinking water causes many biological risks. Therefore, it is important to investigate the drinking water especially in regions where people depend on well water for drinking. Concentrations of some radionuclides in some water wells, in Arar city of Saudi Arabia, were measured by using Hyper Pure Germanium (HPGe) Detector. Concentrations o...

background: the presence of radionuclides in the soil, measures need to be taken to minimize the radiation dose to humans. it is mostly gamma-emitting radionuclides that contribute to the radiation dose in long term behavior of these radionuclides in soil may determine the extent to which such countermeasures need to be applied. materials and methods: the activity concentration of these radionu...

The migration of radionuclides from a borehole repository located about 20 km from the Akwapim fault line which lies in an area of high seismicity was analyzed for some selected radionuclides. In the event of a seismic activity, fractures and faults could be rejuvenated or initiated resulting in container failure leading to the release of radionuclides. A numerical model was solved using a two-...

Artificial radionuclides in the marine environment pose a significant concern along various political, health and environmental aspects since they were introduced as a by-product from the nuclear weapon testing, particularly in the northwestern Pacific Ocean. While radiological concern is confined only in special cases, the introduction of artificial radionuclides has been proven to be very use...

In November 2013, a new EURATOM Directive was issued on the protection of public health from the radionuclide content in drinking water. After introducing the contents of the Directive, the paper analyses the hypotheses about drinking water ingestion adopted in documents of international and national organizations and the data obtained from national/regional surveys. Starting from the Directive...