Speciation studies of Rn/Ln with selected degradation products of organic LILW – New spectroscopic insights into the uranyl-acetate system –


Speciation studies of Rn/Ln with selected degradation products of organic LILW – New spectroscopic insights into the uranyl-acetate system –

Brinkmann, H.; Moll, H.; Arnold, T.

Organic polymers (e.g. cellulose, PVC, bitumen) present in low and intermediate level wastes (LILW) are exposed to ionizing radiation, alkaline pH, and organic degrading microorganisms. This may lead to the formation of smaller, water soluble organic compounds, affecting amongst others the chemical behavior and mobility of radionuclides (RN). In the worst case complexation will lead to an increased mobility and a decreased retention of RN in the barriers of a nuclear waste disposal. Therefore, the characterization of RN complexes with degradation products is necessary for the assessment of the safety and the long-term performance of a nuclear waste repository.
The presentation will give an overview of our planned activities in cooperation with our partners (UNIMAN, SCK·CEN, and UGR) to contribute to task 1.2 of WP 1. Here our focus and expertise lies on the application of different modern spectroscopic tools to directly characterize the speciation of Rn/Ln with organic degradation products and/or with selected microbes, to underpin the findings from UNIMAN and SCK·CEN. Current results obtained by TRLFS, cryo-TRLFS, and UV-vis giving new insights into the uranyl-acetate system will be presented.

Keywords: Uranium; Acetate; TRLFS; UV-vis; MIND

  • Lecture (others)
    MIND Project Annual Meeting 2016, 02.-04.05.2016, Granada, Spain

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Publ.-Id: 23586