Assembly and method for water injection of a neutron absorber element for cooling a nuclear reactor core in a crisis situation

摘要

The assembly (10) has a main pipe (12) including an end (12a) for connection to a water supply and another end (12b) for connection to a circuit connected to a primary circuit of a nuclear reactor, where a pump (14) and a water heating device (15) are provided between the ends of the pipe. An injector (20) allows continuous injection of water e.g. fresh water, in the pipe to a neutron absorbing powder e.g. borate, and a mechanical mixer (25) mixes and dissolves the powder with the water. A control unit controls and monitors the flow of water and the flow of the injected powder. An independent claim is also included for a method for cooling a nuclear reactor core in a crisis situation.