Heat-generating reactor system with a safety afterheat removal circuit

摘要

The heat exchanger feeding the afterheat into the afterheat removal branch (11.1, 10, 11.2) is a steam condenser (18) arranged in the steam plenum chamber (14) of the reactor pressure container (1). This condenser is connected on the secondary side via a rising conduit (19.1) and a falling conduit (19.2) to the water space (20) of an intermediate container (21) arranged above the reactor pressure container (1). The falling conduit (11.2) of the afterheat removal cooler (10) opens into the steam condenser falling conduit (19.2), its rising conduit (11.1) communicating with the water volume (20) of the intermediate container (21) at a connection point (24) which lies geodetically higher than the connection point (23.1) of the condenser falling conduit. The water space (20) of the intermediate container (21) is penetrated by heat-exchanging pipes (21.1) of a cooling branch (25), and this cooling branch is loaded, in normal operation, with low-temperature water from the heating network return conduit (8), the natural circulation through the afterheat removal cooler (10) being induced as soon as the heat removal via the cooling branch (25) falls below a minimum. <IMAGE>