Within the U.S. Department of Energy (DOE) Office of Nuclear Energy's NEAMS program, the Application Drivers Technical Area has been tasked to demonstrate the ability of the NEAMS tools to perform high-fidelity and multiphysics simulations on nuclear microreactors. These are designed by various vendors and U.S. government programs to power remote communities or industrial sites. Microreactors are challenging traditional tools due to their reliance on innovative technologies and their flexible operation requirements. The advanced codes developed under the NEAMS program are meant to provide the capability to perform coupled multiphysics transient simulations enabling reactor designers to optimize microreactor performance under a wide range of potential operating conditions.

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Among the important factors characterizing the quality of sealing mixtures is strength, durability, compatibility and permeability. Experimental work was therefore conducted to assess the use of cement, fly ash, gravel and bentonite in the form of artificial self-hardening sealing mixture. The results of the work show a good compatibility between the bentonite and cement during its fly ash replacement. Compactness of the structure was confirmed by studying of permeability and SEM microscopy, which in the system of ash-cement-bentonite matrix allowed assessing successive microstructure development of hydrating gel.

This paper considers the demineralization of mine water using a lab-scale electrodialysis unit EDR-Z/10-1.0. Experiment were carried out on real mine water from Jeremenko water pit complex (DIAMO s.p., ODRA Ostrava branch, Czech Republic). These mine water greatly affect surface water quality, especially high concentration of dissolved solids, sulfates and chlorides. Aim of research was to treatment of mine water to quality corresponding with legislative limits for surface water. Electrodialysis tests were conducted in the batch and feed-and-bleed modes. It was demonstrated that electordialysis is good way for mine water treatment.

Periods of drought represent a serious problem in the management of water resources. Currently used climatic models assume the onset of major climatic changes and periods of drought. Irrespective of whether the forecasts will be fulfilled or not, it is essential to prepare measures to ensure the supply of drinking water in dry periods. This paper deals with the preparation of water balances for the areas of the Odra and Morava River basins and the prediction of relationships between water supply and water demand in the given area.

The main aim of this work was to prepare a ceramic membrane support applied directly to microfiltration of industrial wastewater using a simple and cheap method. Microfiltration (MF) supports were prepared using fly ash as a dominant material and by addition of natural inorganic materials kaolin and claystone. These powders were mixed with alkali solution in order to prepare paste suitable for extrusion. The extruded tubes dried at room temperature and sintered at 1000°C showed great chemical resistance. Their morphology was examined by scanning electron microscope (SEM) and showed a homogeneous porous structure without any cracks. The average pore size distribution of the tubes was about 2 μm and pore volume was 33%. Fabricated MF membrane supports were tested using the cross-flow microfiltration process. Results with distilled water showed permeability of 680 l/h m 2 bar that is comparable with commercial ones.

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