Impact of Temperature and Radiation Factors on Special Concretes Used for NPP Construction

The core catcher is arranged in an unattended, unventilated sub-reactor space. It designed to receive molten corium emergencies, and thus the concrete used must be resistant high temperatures without significant loss of strength. During nuclear power plant (NPP) operation, these concretes are subjected considerable radiation exposure, which may also affect their physical–chemical properties. Concrete mixes based on Portland cement alumina with iron corundum aggregate were investigated. Model samples temperature exposure range 100 1000 °C field mixed neutron irradiation reactor cell at a load least 1 × 107 Gy. heating over 200 leads decrease strength characteristics from 25.1 MPa 2.6 cement-based 40 12 concretes. due dehydration hardening phases, polymorphic transitions chemical interaction between components. Radiation increase Alumina less decreases as result exposure-induced processes.