Containment building
El containment building The most characteristic element of a nuclear power plant. This building houses the nuclear reactor and all associated systems containing radioactive materials. Its structure is designed to be completely airtight, consisting of reinforced or prestressed concrete walls, often cylindrical or with hemispherical domes. Internally, the walls are covered with welded steel sheets, which ensures complete watertightness.
Its design aims to protect the external environment from radiation emitted by the reactor, both during normal operation and in the event of accidents. In addition, it is built to withstand earthquakes, tornadoes and other natural disasters, with a resistance to pressures of up to 200 psi (approximately 14 atmospheres).
This building acts as the third safety barrier in nuclear operations. The first barrier is the cladding that encloses the nuclear fuel; the second is the primary cooling circuit; and the containment building is the last barrier to prevent radiation from being released to the outside.
Fuel building
El fuel building is responsible for the storage of nuclear fuel, both that which has already been used and that which is pending use in the reactor. This building stores the spent fuel in storage pools water, which allows the radiation they emit to be controlled and the fuel rods to be cooled before their subsequent transport. These pools act as both a thermal and radioactive shield, allowing the fuel rods to cool safely.
Proper storage of spent fuel is critical, as it continues to emit radiation even after use. The water in the pools helps to cool it and reduce radioactivity until it can be transported to final storage facilities.
In many nuclear power plants, this building is directly connected to the containment building for transporting fuel without exposing the rods to external areas, minimizing the risk of leaks.
Turbine building
El turbine building houses the turbines and electric generators that convert the reactor's thermal energy into electrical powerHere, the steam generated in the reactor's secondary circuit is transferred to the turbines, where its expansion turns the generators. In a typical power plant, this movement of the turbines is transferred to the alternators, which generate electricity for consumption.
After the steam drives the turbines, it passes to the capacitors, where it is cooled and converted back into water for reuse, a key process for optimising the plant's operational efficiency. In addition, the turbine building has several safety systems to control mechanical failures, such as steam preheating and auxiliary systems designed to ensure its safe operation.
Auxiliary building
El auxiliary building This is where the support and safety systems necessary to ensure the correct operation of the nuclear power plant under normal and emergency conditions are located. These systems include: water recharge systems, which allow water to be injected into the reactor in the event of an emergency, and the starting systems, which restore power in the event of a blackout.
In addition, this building houses facilities dedicated to the chemical and volumetric treatment of the water that circulates through the cooling circuits, ensuring that the coolant maintains optimum purity to prevent the accumulation of corrosion or radioactive waste.
Electrical building
El electrical building houses several essential equipment for controlling the flow of electricity within the plant. Here are the transformers and the control center which manages the engines and distribution systems. This building also has the Control room, a crucial space from which operators monitor and regulate all plant functions. From this room, the reactor's behaviour, steam pressure and all safety systems can be observed and controlled.
Other buildings
In addition to the structures mentioned above, a nuclear power plant has other buildings dedicated to offices, workshops and laboratories, which serve as technical and administrative support for the staff. These spaces are essential for the correct daily operation of the plant, since they house both the operators and the maintenance and monitoring equipment.
In many modern facilities, there are multifunctional buildings, where training simulators, canteens and offices are located. These simulators are used to train staff in plant management and decision-making during critical situations, ensuring that all operators are prepared for any contingency.
Nuclear power plants are complex facilities made up of several buildings, each with a specific and critical function. From the containment building, which keeps nuclear energy safe, to the multi-purpose buildings that ensure the operation of all the equipment, each structure follows strict safety regulations to ensure efficient operation and prevent any type of accident or radioactive leak.