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■ <strong>EPR</strong> NUCLEAR ISLAND POWER SUPPLY The outline design of the power supply system is shown below. The Emergency Power Supply is designed to ensure that the safety systems are powered in the event of loss of the preferred electrical sources. It is designed as four separate and redundant trains arranged in accordance with the four division concept. Each train is provided with an Emergency Diesel Generator (EDG) set. The emergency power supply system is designed to meet the requirements of the N+2 concept (i.e. assuming a single failure on one train and a maintenance operation on another). The safety loads connected to the emergency power supply correspond to those required to safely shut down the reactor, remove the residual and stored heat and prevent release of radioactivity. In the event of total loss of the four EDGs (Station BlackOut or SBO), two additional generators, the SBO Emergency Diesel Generators, provide the necessary power to the emergency loads. They are connected to the safety busbars of two divisions. Isar 2, Germany (Konvoi, 1,300 MWe) emergency Diesel generator. Electrical systems of an <strong>EPR</strong> nuclear power station Main grid Stand-by grid including auxiliary stand-by transformer G Auxiliary normal transformer Auxiliary normal transformer 10kV 10kV 10kV 10kV M M M M 690V 400V 690V 400V 690V 400V 690V 400V Turbine island Nuclear island 10kV G M G M G M G RCP M 10kV 10kV 10kV M M M M 690V 400V 690V 400V 690V 400V 690V 400V 38 I
FUEL HANDLING AND STORAGE The reactor core is periodically reloaded with fresh fuel assemblies. The spent fuel assemblies are moved to and stored in the Spent Fuel Pool (SFP). These operations are carried out using several handling devices and systems (fuel transfer tube, spent fuel crane, fuel elevator, refueling machine and spent fuel cask transfer machine). The underwater fuel storage racks are used for underwater storage of: • fresh fuel assemblies, from the time they are delivered on site to the time they are loaded into the reactor core, • spent fuel assemblies following fuel unloading from the core and prior to shipment out of the site. The Fuel Pool Cooling and Purification System (FPCPS) is divided into two subsystems: the Fuel Pool Cooling System (FPCS) and the Fuel Pool Purification System (FPPS). The FPCS provides the capability for heat removal from the SFP and is designed to keep the SFP temperature at the required level during normal plant operation (power operation and refueling outage). This system is arranged in a two separate and independent train configuration with two FPCS pumps operating in parallel in each train. The FPPS comprises a purification loop for the SFP, a purification loop for the reactor pool and the IRWST, and skimming loops for the SFP and the reactor pool. The system includes two cartridge filters, a demineralizer and a resin trap filter used for purification of pool water. Chooz B1, France (N4, 1,500 MWe) fuel building. I 39
Page 1 and 2: EPR
Page 3 and 4: • EDF (Electricité de France), a
Page 5 and 6: FOREWORD Security of energy supply
Page 7 and 8: TABLE OF CONTENTS page 08 page 44 p
Page 9 and 10: EPR LAYOUT page 10 >PRIMARY SYSTEM
Page 11 and 12: Water outfall Switchyard Water inta
Page 13 and 14: 2 t +8.50m 1 2 3 4 5 6 1 2 8 6 1 5
Page 15 and 16: CHARACTERISTICS DATA Reactor coolan
Page 17 and 18: In-core instrumentation 12 lance yo
Page 19 and 20: 17 x 17 fuel assembly CHARACTERISTI
Page 21 and 22: Plug connector Upper limit position
Page 23 and 24: Reactor pressure vessel and interna
Page 25 and 26: Heavy reflector The heavy reflector
Page 27 and 28: Steam generator cutaway Secondary m
Page 29 and 30: Reactor coolant pump cutaway 1 2 3
Page 31 and 32: CHARACTERISTICS DATA Main coolant l
Page 33 and 34: CHARACTERISTICS DATA Pressurizer De
Page 35 and 36: SAFETY INJECTION / RESIDUAL HEAT RE
Page 37: OTHER SAFETY SYSTEMS The Extra Bora
Page 41 and 42: Computer-generated image of the EPR
Page 43 and 44: Limitation functions and protection
Page 45 and 46: NUCLEAR SAFETY The fission of atomi
Page 47 and 48: EPR SAFETY The first important choi
Page 49 and 50: Optimized management of accidental
Page 51 and 52: The dedicated corium spreading and
Page 53 and 54: EPR CONSTRUCTION TIME SCHEDULE The
Page 55 and 56: PLANT OPERATION, MAINTENANCE & SERV
Page 57 and 58: Operators have developed ambitious
Page 59 and 60: EPR Key to power station cutaway 1

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