The Vertical Distribution of Strontium-90 and Cesium-137 in the Western North Pacific Ocean


Book Description

The waters of the Kuroshio were sampled for radioactivity as a function of depth. The concentration of Sr-90, total Cs-137, and ionic Cs-137 was determined to 1000 meters. No evidence of ionic Cs-137 (0 plus or minus 0.2 dpm/100 liters) was found in the deep waters. Earlier work of the author in the Central and Eastern North Pacific Ocean showed similar results. (Author).







Fallout Radioactivity in the North Pacific Ocean


Book Description

During a continuing program of surface and deep-seawater sampling in the North Pacific Ocean, bulk seawater samples from these Ocean-Weather-Station locations and other locations have been processed and analyzed. The radiochemical determinations to date for Sr-90 and Cs-137 are tabulated along with corresponding hydrographic data. The general handling and the sampling methods are described, together with the analytical procedures presently employed at NRDL. A new sampling system being developed is compared with the existing bulk-sampling method. Analytical results to date show that the surface-water content of Sr-90 and Cs-137 varies for the different sampling locations. Seasonal variations, however, have not been observed. The existence of fallout radioactivity in the intermediate and deep waters has been observed in some of the vertical, profile samples obtained.




Analysis of Environmental Radionuclides


Book Description

The purpose of this book is to present a state of art summary of current knowledge of methods of assessment of radionuclides in the terrestrial and marine environments. It cover the traditional methods of radioactivity measurements such as radiometrics techniques, but also recent developments in the mass spectrometry sector. The book starts with a short preface introducing the subject of the book, summarising content and philosophy of the book, as well as the most important historical achievements. The scientific topics are introduced by description of sampling methods, optimisation of sampling sites and sampling frequency. The recent developments in radiochemical separation methods using chromatography resins for the treatment of actinides, transuranics and other groups of radioelements are also described. No other book is available covering all aspects of environmental radioactivity measurements, although remarkable progress has been made in detection techniques over the last ten years. At present the new methods enable to carry out investigations which were not possible before, either because of lack of sensitivity or because of the fact that they required too large samples.



















Radiological Contamination of the Oceans


Book Description