The large discharge of radioactivity into the northwest Pacific Ocean from the 2011 Fukushima Dai-ichi nuclear reactor accident has generated considerable concern about the spread of this material across the ocean to North America. We report here the first systematic study to our knowledge of the transport of the Fukushima marine radioactivity signal to the eastern North Pacific. Time series me...

INTRODUCTION Among the many radionuclides possibly released in a severe reactor accident or a nuclear weapon's detonation Cs and Sr are of particular importance for the long-term exposure. Due to their long physical halflife of 30 and 28.5 years, respectively, the exposure of the population by these nuclides will last for decades and has to be taken into account in estimating the total 50 year-...

A large part of the strontium-go from fallout that reaches man is from fallout on vegetation, and any process affecting its absorption by animals affects its transfer to man. The 90Sr content of vegetation comes from two sources, that in the soil from previous fallout which is incorporated through the roots into the plant tissue, and that from current fallout producing a surface contamination o...

Soil erosion is a global environmental problem, and anthropogenic fallout radionuclides offer a promising tool for describing and quantifying soil redistribution on decadal time scales. To date, applications of radioactive fallout to trace upland sediment transport have been developed primarily on lands disturbed by agriculture, grazing, and logging. Here we use Cs to characterize and quantify ...

different approaches of source apportionment of dust fractions have been reported world-over. predicting source categories within receptor chemical profiles using regression and factor analysis using pca has been reported to evaluate possible source/routes of air pollution mass. the present study is focused on the application of all three approaches to investigate higher degrees of significance...

Radioactive fallout from nuclear test detonations during 1946-1958 at Bikini and Enewetak Atolls in the Marshall Islands (MI) exposed populations living elsewhere in the MI archipelago. A comprehensive analysis, presented in seven companion papers, has produced estimates of tissue-specific radiation absorbed dose to MI residents at all historically inhabited atolls from internal (ingested) and ...

During Chernobyl accident a large amount of radionuclides were released into atmosphere and added to atmospheric nuclide inventory from weapons tests. In early May of 1986 in South Korea, radioactivities such as 1-131 and Cs-137 were detected in surface air and rain water. That indicated that Chernobyl debris spreaded to far eastern Asia. In the present time, the long-lived radionuclides have b...

BACKGROUND Occupational risks, the present nuclear threat, and the potential danger associated with nuclear power have raised concerns regarding the metabolism of plutonium in pregnant women. OBJECTIVE We measured plutonium levels in the milk teeth of children born between 1951 and 1995 to assess the potential risk that plutonium incorporated by pregnant women might pose to the radiosensitive...