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for iodine-131 and between 1 and 11 Bq/l for cesium-137.
Nearly 40% of the radioactivity in the spent fuel for both types of reactors is cesium-137, and the pools hold about four to five times more cesium-137 than is contained in the reactor cores.
Recent reports indicate the Japanese disaster has released more iodine-131 than cesium-137.
Based on a detailed analysis of official data and reports, a report compiled at the request of Rebecca Harms (Greens/European Free Alliance, Germany) and the Green Party in the European Parliament by independent experts entitled "The Other Report on Chernobyl" (1) has revealed that the International Atomic Energy Agency (IAEA) and the World Health Organisation (WHO) deliberately played down the impact of the disaster whose nuclear fallout touched and contaminated as much as one third of the surface area of Western Europe with Cesium-134, Cesium-137 and the iodine-131.
The cesium-137 technique (McHenry, 1969; McHenry and Ritchie, 1977; Ritchie and McHenry, 1990) affords an alternative to conventional soil erosion measuring and a means of obtaining sediment yield measurements distributed within a basin and useful for testing spatially distributed models.
But some of the other radioactive material - including cesium-137, colbalt-60 and strontium - could have been valuable to a terrorist seeking to fashion a terror weapon.
If the cooling pools at any plant lose water through attack or accident, the waste will burn, releasing far more than the two mega-curies of cesium-137 that escaped at Chernobyl.
The sites with guano registered ten times the concentration of the radioactive isotope cesium-137, which does not occur naturally but has been released into the atmosphere through nuclear testing and reactor meltdowns.
Cesium-137, which decays to nonradioactive barium, is found in spent fuel elements from nuclear reactors.
Bandazhevsky, the director of the Gomel Medical Institute in Belarus, reported finding high levels of Cesium-137 contamination left over from the 1986 explosion of the Chernobyl nuclear powerplant.
Cesium-137 also accumulates in tissues as it moves up the food chain, and human exposure may result in detrimental health effects or genetic mutations that can lead to cancers, according to the U.