Radiation monitoring using imaging plate technology: A case study of leaves affected by the Chernobyl nuclear power plant and JCO criticality accidents

This paper describes the use of a photostimulable phosphor screen imaging technique to detect radioactive contamination in the leaves of wormwood (Artemisia vulgaris L) and fern (Dryopteris filix-max CL. Schoff) plants affected by the Chernobyl nuclear power plant accident. The imaging plate technology is well known for many striking performances in two-dimensional radiation detection. Since imaging plate comprises an integrated detection system, it has been extensively applied to surface contamination distribution studies. In this study, plant samples were collected from high- and low-contaminated areas of Ukraine and Belarus, which were affected due to the Chernobyl accident and exposed to imaging technique. Samples from the highly contaminated areas revealed the highest photo-stimulated luminescence on the imaging plate. Moreover, the radio nuclides detected in the leaves by gamma and beta ray spectroscopy were 137Cs and 90Sr, respectively. Additionally, in order to assess contamination, a comparison was also made with leaves of plants affected during the JCO criticality accident in Japan. Based on the results obtained, the importance of imaging plate technology in environmental radiation monitoring has been suggested

Transfer factors of radioactive Cs, Sr, Mn, Co and Zn from Japanese soils to root and leaf of radish

Transfer factors (TFs) of some selected radionuclides from ten different Japanese soils to radish have been studied by radiotracer experiments. The geometric mean values of TFs (on a wet weight basis) of radioactive Cs, Sr, Co, Mn and Zn for edible parts of radish (tuber) were 0.0090, 0.029, 0.00094, 0.0034 and 0.067, respectively. TFs for leaf were higher than those for tuber. The geometric mean values of leaf / tuber ratios were 4.1 for Cs, 4.9 for Sr, 1.6 for Co, 11 for Mn and 1.9 for Zn, respectively. Most of the Cs TFs obtained for Andosol, which is the most common arable soil in Japan, were higher than those for the other soils. This might be due to the high concentrations of organic matter and alophen in andosol. The obtained TFs were compared to reference values of IAEA Technical Report 364

Transfer factors of radionuclides from Andosols to crops

Transfer factors (TFs) of radionuclides from Andosol, a typical soil type in Japan, to several crops (leaf vegetables and root vegetables) have been studied by radiotracer experiments. Cabbages, komatsuna, spinach and lettuce were used as leaf vegetables and radish, carrot and turnip were used as root vegetables. The mean values of TFs (on a wet weight basis) of radionuclides (Cs-137, Sr-85, Mn-54, Zn-65, Co-60 and I-125) for edible parts of leaf vegetables were 0.11, 0.24, 0.046, 0.60, 0.51 and 0.0054, respectively. Respective values for edible parts of root vegetables were 0.02, 0.14, 0.0037, 0.093, 0.13 and 0.0022, respectively. The obtained TFs were, in most cases in the order Mn, Zn, Sr > Cs > Co > I. The TFs of I-125 were much lower than others. The transfer factors obtained for the edible part of root vegetables were markedly lower than those for leaf vegetables. The transfer factors of Sr and Mn for leaf vegetables were generally higher for older (outer) leaves than younger (inner) ones. In the most of case of root vegetables, TFs for leaf part were higher than those for tuber.放射生態学と環境の放射線被ばくに関する国際シンポジウム （平成１５年度環境研国際検討委員会

Transfer factors of radionuclides from Andosols to crops

Transfer factors (TFs) of radionuclides from Andosol, a typical soil type in Japan, to several crops (leaf vegetables and root vegetables) have been studied by radiotracer experiments. Cabbages, komatsuna, spinach and lettuce were used as leaf vegetables and radish, carrot and turnip were used as root vegetables. The mean values of TFs (on a wet weight basis) of radionuclides (Cs-137, Sr-85, Mn-54, Zn-65, Co-60 and I-125) for edible parts of leaf vegetables were 0.11, 0.24, 0.046, 0.60, 0.51 and 0.0054, respectively. Respective values for edible parts of root vegetables were 0.02, 0.14, 0.0037, 0.093, 0.13 and 0.0022, respectively. The obtained TFs were, in most cases in the order Mn, Zn, Sr > Cs > Co > I. The TFs of I-125 were much lower than others. The transfer factors obtained for the edible part of root vegetables were markedly lower than those for leaf vegetables. The transfer factors of Sr and Mn for leaf vegetables were generally higher for older (outer) leaves than younger (inner) ones. In the most of case of root vegetables, TFs for leaf part were higher than those for tuber.放射生態学と環境の放射線被ばくに関する国際シンポジウム （平成１５年度環境研国際検討委員会

Transfer factors of radionuclides from Andosol to some selected crops

The 2nd international conference on radioactivity in the environmen