New Methods and Materials in Nuclear Fuel Fabrication and Spent Nuclear Fuel and Radioactive Waste Management

Винокуров, С. Е.; Kulikova, Svetlana A.; Frolova, Anna V.; Danilov, S. S.; Belova, Kseniya Y.; Rodionova, Anastasiya A.; Myasoedov, B. F.

doi:10.1007/978-3-031-09883-3_39

Cited by 1 publication

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“…One possible alternative to these matrices is chemically bonded phosphate ceramics [11], which include a mineral-like magnesium potassium phosphate (MPP) matrix. Earlier, we Energies 2023, 16, 5513 2 of 13 showed in [4,12,13] that MPP matrix of the composition MgKPO 4 × 6H 2 O is an effective and multipurpose material for conditioning of RW, including ILW and HLW. The MPP matrix is produced at room temperature by reaction (1) and is an analogue of the natural mineral struvite-K [14].…”

Section: Introductionmentioning

confidence: 99%

The Use of Dolomite to Produce a Magnesium Potassium Phosphate Matrix for Radioactive Waste Conditioning

et al. 2023

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Magnesium potassium phosphate (MPP) matrix MgKPO4 × 6H2O is a known material for radioactive waste (RW) conditioning; magnesium oxide MgO is used in the classical method of matrix synthesis. The aim of the work was to investigate the possibility of using the widely available natural mineral raw material dolomite, incorporating mixed magnesium and calcium carbonate, for the production of this matrix. To control the quality of the samples obtained, their phase and elemental compositions, microstructure, density, volumetric and apparent porosity, compressive strength, and hydrolytic stability were studied. As a result, it was found that using dolomite powder pre-calcined at 720 °C for 1.5 h, samples of matrix whose properties meet the regulatory requirements for solidified RW were obtained. Thus, a new, cost-effective method of synthesis of the MPP matrix has been demonstrated to solve the RW solidification problem.

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