Development of Novel SCW Ultrafiltration System

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The proposed study focuses on understanding the properties of supercritical water (SCW) containing solid corrosion or wear products, a detailed characterization of the particulates and their fluidic properties, and the development of high-pressure-temperature separation technologies for the removal of solids. While current CANDU designs have an indirect cycle, i.e., a separate primary heat transport system in contact with the fuel coupled (via steam generators) to the secondary side for steam production to drive turbines, the CANDU SCWR is likely to be a direct cycle plant, i.e., the same fluid that contacts the fuel will also drive the turbines. In a boiling water reactor (BWR), ionic impurities, precipitated solids, wear debris and radioactive corrosion products in heat transport systems are largely retained in the liquid phase of a two-phase vapor-water system. Those species are considered hazardous to system materials and heat transfer and radiation safety, and are controlled/removed by comprehensive chemistry control protocols.