Chemical Studies on Molten Salt Circulationg Loop for Nuclear Energy Conversion System

熔盐是一种有用的材料，可用于许多未来的核工程应用。对于此类应用，熔盐循环回路通常是作为工厂组件的一部分所必需的。熔盐与环形建筑材料的相容性涉及各种问题，这取决于盐的应用。其中一些是高温下的蠕变破坏，对流引起的侵蚀和腐蚀。本项目主要从电化学的角度研究腐蚀问题。对非等温熔盐体系中的传质现象及其电化学动力进行了较为深入的研究。此外，还探讨了氢、氧及其相关化学物质的电化学行为，以及利用放射性示踪技术进行电化学研究的可能性。

Molten salt is a useful material for use in many future nuclear engineering applications. For such applications, molten salt circulating loop is often necessary as a part of plant assemblies. The compatibility of molten salt with loop construction materials involves various problems depending on the applications for which the salts are to be used. Some of these are creep failure at high temperature, erosion caused by convection, and corrosion.The aim of this project is to study corrosion problems mainly from electrochemical viewpoints. Mass transfer phenomenon and its electrochemical motive force in a nonisothermal molten salt system is investigated most intensively. Besides, electrochemical behaviours of hydrogen, oxygen and their related chemical species and a possibility of using radio-tracer technique for such electrochemical studies are also investigated.