Chemical Effects and the Impact to Insulation Debris Filtercakes at ECCS Upstream and Downstram Components

Abstract

Investigations regarding release, solution, transportation and deposit of corrosion products become important to reactor safety research for PWR, when considering the long-term behaviour of emergency core cooling systems (ECCS) during loss of coolant accidents (LOCA). The knowledge of corrosion processes in boric acid is necessary to evaluate the impact on insulation debris filter cakes in upstream (sump strainers) and downstream (reactor core) components and their influence on head loss and heat removal out of the core. Generic complex experiments determined the quantity of flow-induced, released corrosion products and their influences on head losses at filter cakes.