After the nuclear reactor launch, absorbing rods are removed from the fuel rods, which prevent uranium from reacting. Once the rods are removed, the uranium neutrons begin to interact with each other. When neutrons collide, a mini-explosion occurs at the atomic level, energy is released and new neutrons are born, a chain reaction starts to occur. This process produces heat. Heat is given to the coolant. Depending on the type of coolant, it turns into steam or gas, which rotate the turbine.
A turbine drives an electric generator. It, in fact, produces an electric current. If you do not control the process, the neutrons of uranium can collide with each other until they disable the reactor and damage the nuclear power station. Computer sensors monitor the process, they capture an increase in temperature or pressure change in the reactor and can automatically stop the reaction.