HOW THE EPR WORKS In a PWR, the pressurized water in the primary system is used as a moderator to slow down the neutrons, allowing a nuclear reaction to occur in the core, and to transfer the heat generated during the reaction to the steam generators. The EPR has four steam generators - one for each of the four heat removal loops composing the primary system. Steam generators are heat exchangers. On their primary side, they receive heat from the nuclear reactor, and on their secondary side, they deliver heat to the non nuclear part of the facility (there is a leak-tight separation between the primary and secondary sides of the steam generators). That secondary heat produces steam to power the turbine generator which in turn generates electricity.

	1. Reactor 2. Reactor coolant pumps 3. Steam generator 4. Reheater 5. Turbine 6. Generator 7. Switchgear 8. Condenser 9. Reheat system 10. Condensate pump 11. Coolingwater system 12.Coolingwater pumps 13. Coolingwater system 14. Cooling tower