Article

Measurement limits to Cs-134 concentration in soil

Department of Physics, Pusan National University, Pusan, Republic of Korea.
Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine (Impact Factor: 1.09). 09/2011; 69(9):1294-8. DOI: 10.1016/j.apradiso.2011.05.006
Source: PubMed

ABSTRACT We investigate the caesium concentrations in soils in mountain areas near Gori nuclear power plant in Korea, focusing on the measurement limits to the (134)Cs. In order to lower the minimum detectable amount (MDA) of activity for the (134)Cs, we have used the ammonium molybdophosphate (AMP) precipitation method to get rid of the (40)K existing in natural radioactivity, which reduces the MDA activity about 10 times smaller than those without the AMP precipitation method. The MDA results for the (134)Cs were found to be in the range between 0.015 and 0.044 Bq/kg-dry weight. In order to diminish the background, we also have measured a part of the soil samples in Yangyang, a small town in the east coast of Korea. However, it turns out that in order to detect the (134)Cs in the samples the MDA should be reduced to the level of mBq/kg-dry weight.

0 Bookmarks
 · 
191 Views
  • Analytical Chemistry 04/2002; DOI:10.1021/ac60259a007 · 5.83 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Marine mammals being among the top predators in the food web tend to accumulate organic and inorganic contaminants from the environment. The body burden of contaminants in these species could reflect their foods and thus contaminant levels could serve as proxies on the changes of ecosystem. A pilot study was carried out to investigate the possibility of radionuclide leakage at Amchitka using a suite of sea otter (Enhydra lutris) skulls collected near Amchitka nuclear test-sites before (1950s) and after the testing (1990s), and at Adak, another Aleutian Island, about 300 km from Amchitka, where the potential impact of radionuclide leakage from Amchitka is expected to be negligible. In addition, the naturally occurring and anthropogenic radionuclide content on the sea otter skull was also utilized to investigate if there was any significant ecosystem changes in the environment. Concentration of 210Pb in sea otter bones collected during the 1950s was significantly higher than those collected in the 1990s. We propose that among the various factors that could cause this higher enrichment in 210Pb, changes in the sea otter prey is the most likely one. Comparison of the 137Cs, 90Sr, 239,240Pu concentrations appear not to be significantly higher in sea otter skulls collected in 1990s from Amchitka where the underground tests in 1965-71 than those from Adak, although significant differences were detected among different groups collected at various times.
    Journal of Environmental Radioactivity 02/2003; 64(1):1-18. DOI:10.1016/S0265-931X(02)00036-X · 3.57 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The vertical migration of ⁹°Sr and ¹³⁷Cs produced by the explosion of the atomic bomb in 1945 was investigated in an unsaturated soil layer in the Nishlyama am of Nagasaki. The in situ migration rates of ⁹°Sr and ¹³⁷CS were estimated to be 4.2 mm yr⁻¹ and 1.0 mm yr⁻¹, respectively, when the rate of movement of soil water was 2500 mm yr⁻¹. The in situ K{sub d} values of ⁹°Sr and ¹³⁷Cs were calculated to be 0.3 m³ kgâ⁠and 1.2m³kg⁻¹, respectively. These are probably the only results that exist for the interaction between soil and ¹³⁷Cs and ⁹°Sr over 40 yr. Then results suggest that since fallout ¹³⁷Cs and ⁹°Sr have remained In the surface soil for a long period of time, we should pay significant attention to radiological effects of nuclear accidents such as the Chernobyl disaster.
    Journal of Environmental Quality 01/1993; 22(4):722-730. DOI:10.2134/jeq1993.00472425002200040013x · 2.35 Impact Factor

Full-text (2 Sources)

Download
25 Downloads
Available from
Aug 8, 2014