SHIELDING SYSTEM FOR WATER-MODERATED REACTOR CONTAINMENT Russian patent published in 1998 - IPC

FIELD: nuclear reactors. SUBSTANCE: arresting screen installed in reactor room at outlet of air supply pipings functions as shielding element; drain on reactor room floor has arresters preventing displacement and self-locking of drain components. Supporting structure in the form of grid or perforated sheet is installed on drain to prevent direct contact between containment shielding system components and corium, to damp water and mechanical thrusts associated with corium falling and with separation of reactor vessel bottom or internal devices. Supporting structure mounts elastoplastic air dashpots arranged over reactor room perimeter. Air dashpots have bodies collapsing under effect of shock loads and accommodate damping members to suppress shock waves and dynamic vibration loads. EFFECT: improved reliability of containment shielding. 15 cl, 4 dwg