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Nuclear Liquid Wastes Calcination: The High-Level French Experience – 17184

Abstract : Calcination is an efficient process for volume reduction and stabilization of nuclear liquid wastes. It is often the first step of waste containment processes such as vitrification or grouting.The CEA (French Alternative Energies and Atomic Energy Commission) and AREVA have acquired a high-level experience in the field of calcination through more than forty years of R&D and industrial operation. During this period, a broad range of liquid wastes have been studied and treated.R&D work and associated engineering studies allowed defining the design and sizing of the equipment and the process control parameters to be applied for the calcination of all kinds of solutions.The calcination process has been qualified for the following effluents amongst others:Liquid waste from UOx fuel reprocessingLiquid waste from UMo fuel reprocessing (high molybdenum and phosphorus contents)Hanford HLWLiquid waste from D&D operation (sodium bearing waste)This paper presents several studies led by the Joint Vitrification Laboratory (L.C.V), a common research laboratory between CEA and AREVA in charge of qualifying new processes and matrices for waste containment. These studies allowed defining the calcination rules, in particular for very hard to process solutions such as effluents with high boron, molybdenum and sodium contents.The feedback from industrial operation of the calcination process with fission products and effluents from D&D operations, highly loaded with sodium, is also presented.
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R. Didierlaurent, A. Rodrigues, A. Ledoux, S. Schuller, C. Veyer. Nuclear Liquid Wastes Calcination: The High-Level French Experience – 17184. WM2017 Conference, March 5 9, 2017, Phoenix, Arizona, USA, Mar 2017, Phoenix, United States. ⟨cea-02435098⟩

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