Development of Novel SCW Ultrafiltration System

拟议的研究重点是了解含有固体腐蚀或磨损产物的超临界水（SCW）的特性，颗粒及其流体特性的详细表征，以及用于去除固体的高压-温度分离技术的发展。 虽然目前的CANDU设计具有间接循环，即，与燃料接触的单独的一次热传输系统（通过蒸汽发生器）耦合到二次侧，用于产生蒸汽以驱动涡轮机，CANDU SCWR可能是直接循环装置，即，接触燃料的相同流体也将驱动涡轮。在沸水反应堆（BWR）中，热传输系统中的离子杂质、沉淀固体、磨损碎片和放射性腐蚀产物大部分保留在两相蒸汽-水系统的液相中。这些物质被认为对系统材料、传热和辐射安全有害，并通过全面的化学控制方案进行控制/清除。

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.