Device for core container-crash protection and coolant guidance in a nuclear reactor pressure vessel

Apparatus for core-barrel crash protection and conduction of coolant in a nuclear reactor pressure vessel having a spherical bottom, including a core support structure having a core barrel and being disposed within the pressure vessel, the apparatus comprisng coolant collecting means disposed below the core support structure and supported on the spherical bottom for uniformly distributing coolant flow, said collecting means being in the form of a substantially hollow cylindrically walled perforated barrel having coolant passage openings formed therein, the spherical bottom having an annular bracket and a central bracket rigid with said spherical bottom, said perforated barrel having a lower rim disposed on said annular bracket and a central support piece disposed on said central bracket, and means for pressing said lower rim against said annular bracket, said pressing means including a strut system connecting said central support piece to said cylindrical wall of said perforated barrel and detachable connecting means for clamping said central support piece to said central bracket, said central bracket and said central support piece defining a small gap therebetween closed under elastic tensional deformation of said strut system by said detachable connecting means so as to press the lower rim of said perforated barrel through said strut system against said annular bracket, a first set of anchor points distributed about the periphery of said central support piece and a second set of anchor points distributed about said cylindrical wall of said perforated barrel, said strut system being in the form of a multiplicity of rods disposed in star-like manner, each of said rods extending from a first to a second anchor point, and, for elastically tensionally deforming said strut system by clamping action of said detachable connecting means, said central support piece extending at least partially above said lower rim in the axial direction of said cylindrical perforated barrel.