Assembly and method for injecting water containing a neurton-absorbing element to cool a nuclear reactor core in a crisis situation

An assembly for injecting water containing a neutron-absorbing element in order to cool a nuclear reactor core of a nuclear reactor in a crisis situation, the assembly comprising:

• a mobile structure containing a main pipe, the main pipe including a first end connectable to a water supply, a second end connectable to a circuit connected to a primary circuit of the nuclear reactor and, between the first and second ends, in order to ensure the circulation of water:
• a pump;
• an injector for continuously injecting the neutron-absorbing element in powder form into the water of the main pipe;
• a first mixer for mixing and dissolving the powdered form of the neutron-absorbing element in the water;
• and
• a controller for driving and controlling the flow rate of the water and the powder injected.