Study On The Rapid Analysis Of Trace Amount Of Pu, U, Am, Th And Sr In Llw And Environmental Water

For the environmental and nuclear facilities samples, the matrixes are usually complex and the contents of plutonium, uranium, americium and strontium are very low(often at trace levels(< 10-15 g L-1)). To accurately analyze the low level and the changeable chemical properties of nuclides in the samples, the sensitive and reliable analytical methods are usually needed.In the present work, the negative pressure system is introduced into the analytical process of low level wastewater and environmental water samples. The chromatographic column separation system and the measurement methods are also optimized. Accordingly, the analytical procedures including negative pressure chromatographic column separation with low background alpha spectrometer as well as alpha/beta liquid scintillation counter measurement of trace Pu, U, Am and Sr in low level wastewater and environmental Water are established and applied for the environmental samples.These new procedures have been proved to be fast and accurate analytical methods with the higher recovery of target nuclides, the higher decontamination factor for impurities as well as the less radioactive wastes generation. Different samples can be carried out by different group of chromatographic columns simultaneously, and several different chromatographic columns can be installed into each group of chromatographic column. These analytical methods have “production line” or “pipeline” operation mode, also namely the “matrix” operation mode. The developed analytical methods can be applied for the analysis of batch samples of low level wastewater and environmental water, especially the polluted water of the nuclear accident.