| abstract |
In an installation for nuclear reactors, in particular for light water reactors, a core containment device (CC) provided with a coolable collecting tank (19) is placed inside a reactor cavern (8) and in the - below the reactor vessel (6). The collecting tank (19) comprises a casing wall (21) which extends at least approximately up to the height of the reactor core (10), and a bottom wall (20). The bottom and casing walls (20, 21) of the collecting tank (19) are mounted with an intermediate space (28) with respect to the bottom (7.1) or to the circumferential wall (7.2) of a support structure and protection (7) of the reactor vessel (6). In this intermediate space are formed cooling channels (29.1, 29.2) on the bottom side and on the shell side for the external cooling of the collecting tank (19) with a coolant as well as, in the flat region of the bottom wall (20) , swirl elements (34, 34a) for producing a turbulent flow of coolant flowing from the inside to the outside to the casing wall (21) through the bottom wall (20 ). Also described are the core containment device (CC) itself, a method for activating and maintaining emergency external cooling of the collecting tank (19) as well as the use of delta wings producing high pressure. turbulences, which are located in the cooling system of the collecting tank (19), in the region of the bottom wall of the latter. |