Passive safety device for emergency steam dump and heat removal for steam generators in nuclear power reactors

摘要

The present invention provides a passive safety device for dumping steam from the steam generator of a nuclear power reactor in case of emergencies. The device comprises a steam ejector immersed in a storage tank of coolant water, a conduit connecting the steam ejector to the steam line from the steam generator, a heat exchanger having its inlet connected to the outlet of the steam ejector and the outlet to the storage tank, and a coolant pool in which the heat exchanger is immersed. Optionally, the output from the steam ejector may be connected to the feedwater line to the steam generator as an emergency feedwater supply.