Pressure suppression type container for a nuclear reactor

Herein disclosed is a compact pressure suppression type reactor container for a nuclear reactor, characterized in that both the drywell and pressure suppression chamber are housed in a single reactor container with a partition disposed therebetween adapted so as to absorb thermally induced distortion and high pressures during accidents. A supporter is fixed to the inner wall of the reactor container and adapted to slidably support the partition through the intermediary of rollers, thus enabling differences in thermal expansion to be absorbed. Sealing at this sliding section is achieved through the provision of a seal skirt which is freely deformable to compensate for distortion and mounted to the upper side of the partition so as to directly contact the reactor container. This arrangement completely eliminates leakage while absorbing the difference in thermal expansion between the partition and supporter and provides a structure designed to withstand earthquake loads and upward reaction forces due to accidental release of pressure at the vent pipes. (Owens, K.J.)