Explained: What is A ‘Core Catcher’ In A nuclear Plant?
According to the Rosatom website, the core catcher is a cone shaped metal structure that weighs about 800 tonnes. The structure is double walled, with the gap between the two walls filled with FAOG (ferric and aluminium oxide granules). The core catcher is filled with a ceramic mixture also including ferric oxide and aluminium oxide, called ‘sacrificial material’.