A SAFETY SYSTEM OF A NUCLEAR REACTOR FOR STABILIZATION OF EX-VESSEL CORE MELT DURING A SEVERE ACCIDENT

摘要

There is provided a safety system for a nuclear reactor (1), wherein the nuclear reactor (1) has a reactor pressure vessel (2) and the nuclear reactor is arranged at least partly in and/or above a reactor cavity (3). The safety system comprises a plurality of floatable objects (4) arranged in and/or in connection with the reactor cavity (3) for providing a floating bed of objects under the reactor pressure vessel (2) when the reactor cavity (3) is at least partly water filled.