EPR – Areva brochure

■ EPR NUCLEAR ISLANDEPR LAYOUTWater outfall7Switchyard34133235461 Reactor BuildingThe Reactor Building located in the center of the Nuclear Island housesthe main equipment of the Nuclear Steam Supply System (NSSS)and the In-Containment Refueling Water Storage Tank (IRWST). Itsmain function is to ensure protection of the environment against internaland external hazards consequences under all circumstances. Itconsists of a cylindrical pre-stressed inner containment with a metallicliner surrounded by an outer reinforced concrete shell.The main steam and feedwater valves are housed in dedicatedreinforced concrete compartments adjacent to the Reactor Building.The primary system arrangement is characterized by:• pressurizer located in a separate area,• concrete walls between the loops and between the hot and coldlegs of each loop,• concrete wall (secondary shield wall) around the primary systemto protect the containment from missiles and to reduce the spreadof radiation from the primary system to the surrounding areas.2 Fuel BuildingThe Fuel Building, located on the same common basemat as theReactor Building and the Safeguard Buildings, houses the fresh fuel,the spent fuel in an interim fuel storage pool and associated handlingequipment. Operating compartments and passageways, equipmentcompartments, valve compartments and the connecting pipe ductsare separated within the building. Areas of high activity are separatedfrom areas of low activity by means of shielding facilities. Themechanical floor houses the fuel pool cooling system, the emergencyboration system, and the chemical and volume control system. Theredundant trains of these systems are physically separated by a wallinto two building parts.3 The Safeguard BuildingsThe four Safeguard Buildings house the safeguard systems such asthe Safety Injection System and the Emergency Feedwater System,and their support systems. The four different trains of these safeguardsystems are housed in four separate divisions, each located in oneof the four Safeguard Buildings.The Low Head Safety Injection System is combined with theResidual Heat Removal System. They are arranged at the inner areasin the radiologically controlled areas, whereas the correspondingComponent Cooling and Emergency Feedwater Systems areinstalled at the outer areas in the classified non-controlled areas.The Main Control Room is located in one of the Safeguard Buildings.4 Diesel BuildingsThe two Diesel Buildings shelter the four emergency Dieselgenerators and their support systems, and supply electricity to thesafeguard trains in the event of a complete loss of electrical power.The physical separation of these two buildings provides additionalprotection.Water intakeQuay5 Nuclear Auxiliary Building6 Waste BuildingPart of the Nuclear Auxiliary Building (NAB) is designed as aradiological non-controlled area in which parts of the OperationalChilled Water System are located. Special laboratories for samplingsystems are located at the lowest level. The maintenance area andsome setdown areas used during the refueling phase are arrangedon the highest level. All air-exhausts from the radiological controlledareas are routed, collected and controlled within the Nuclear AuxiliaryBuilding prior to release through the stack.Nuclear IslandTurbine IslandBalance of PlantThe Waste Building is used to collect, store and treat liquid and solidradioactive waste.7 Turbine BuildingThe Turbine Building houses all the main components of the steamcondensate-feedwatercycle. It contains, in particular, the turbine,the generator set, the condenser and their auxiliary systems.10 I I 11