An Overview of Corrosion Products Solubilities in Subcritical and Supercritical Water

Abstract

Solubility is a fundamental property of materials which influences both the dissolution of oxide films on alloys and the deposition rate of resulting corrosion products. In a supercritical water reactor (SCWR), the decrease in water density from subcritical to supercritical regions can result in a decrease of solubility and deposition of corrosion products. Such deposition in the reactor core can seriously affect the fuel performance, thermalhydraulics and activity transport in an SCWR. This paper reviews the solubilities of some potential corrosion products in subcritical and supercritical aqueous solutions. The effects of temperature, pressure and water chemistry on the solubilities of corrosion products are discussed.