8,343 research outputs found

    Influence of Chronic Radiation Exposure on the Temporal Dynamics of Seeds Germination in Scots Pine Populations from the Bryansk Region Affected By the Chernobyl Accident

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    Temporal dynamics of seeds germination in Scots pine populations growing in theBryansk region of Russia radioactively contaminated as a result of the Chernobyl accident were investigated over a period of 8 years (2008-2015). In contrast to cytogenetic effects in Scots pine, we failed to detect any significant impact of chronic radiation exposure on time dynamics of seeds germination. Keywords: Scots pine, Chernobyl accident, chronic exposure, temporal dynamics, seeds germinatio

    Radiocesium concentrations in the lichen-reindeer/caribou food chain: Before and after Chernobyl

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    This paper reviews historical concentrations of radiocesium (Cs-137) in the reindeer/caribou food chain in Alaska. These data, along with available kinetic models which describe the movement of radiocesium through the food chain, are used to predict consequences of radioactive fallout from the Chernobyl accident which occurred in late April 1986. During the present discussion, efforts are made to directly relate the Alaskan data to the Scandinavian situation as it exists following the Chernobyl accident

    The 25th Anniversary of the Chernobyl Accident

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    The nuclear accident at the Chernobyl plant in 1986 is described and a summary of its immediate effects on people and the environment outlined. Then there is a summary of the important parts of the literature on diseases and deaths resulting from radiation and mortalities to date and the way mortality data became increasingly conservative over the years is discussed. Today, there is still uncertainty about future mortalities dues to long latency periods for many cancers however cancer deaths in Chernobyl affected regions are expected to be similar to non-Chernobyl controls. The major literature on environmental effects on wild species, forests, water and agricultural land are then reported with a brief discussion of remediation work and of current trends. Finally, contemporary perceptions of the Chernobyl accident are described in the context of popular anti-nuclear sentiment that prevailed in 1986, the immense publicity surrounding the accident and the natural tendency of people to exaggerate prospects of unlikely, yet extreme, events.Environmental Economics and Policy,

    How Should Governments Address High Levels of Natural Radiation and Radon--Lessons from the Chernobyl Nuclear Accident and Ramsar, Iran

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    The authors discuss the high levels of natural background radiation in Ramsar, Iran, and offer data indicating that this has had little effect on the health of Ramsar\u27s inhabitants. The authors then examine the implications their research could have for public health policy

    The Chernobyl Reference Horizon (?) in the Greenland Ice Sheet

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    Published reports of the presence of radioactive debris from the Chernobyl reactor accident in snow on the Greenland ice sheet raised the strong prospect that such debris might constitute a valuable time stratigraphic marker all over the ice sheet. Large volume snow samples to test this possibility were collected from 7 snowpits as part of a wide ranging regional snow chemistry survey conducted during 1987 and 1988. Snow “labeled” with Chernobyl derived radioactivity was detected in all of the pits. However, the total amount of radioactive debris found at the different locations varied over a 20 fold range. The variability in total fallout showed no clear large scale spatial pattern that could be related to the presumed progress of the radioactive plume over Greenland, suggesting that small scale differences in precipitation pattern and reworking of the snow by wind were predominantly responsible for the patchy preservation of the Chernobyl “layer” on the Greenland ice sheet

    Review of Past Nuclear Accidents: Source Terms and Recorded Gamma-Ray Spectra

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    Airborne gamma ray spectrometry using high volume scintillation detectors, optionally in conjunction with Ge detectors, has potential for making rapid environmental measurements in response to nuclear accidents. A literature search on past nuclear accidents has been conducted to define the source terms which have been experienced so far. Selected gamma ray spectra recorded after past accidents have also been collated to examine the complexity of observed behaviour