1. Energy for the Future Belene NPP Design Features 28 - 30 May, 2008 Riviera Holiday Club, Varna, Bulgaria Jordan Georgiev BNPP Manager

2. Energy for the Future Content Original BNPP Design Advanced Design Features –Main Equipment –Safety Features Highlights of Evaluation Your Contacts

3. Energy for the Future Original BNPP Design

4. Energy for the Future Original Design Features Single Wall Containment: -pre-stressed reinforced concrete -leak tight metal liner DBA and BDBA Conditions: -Pressure – 0.5 MPa -Temperatire – 150 C Reactor Type : WWER 1000/V320 RPV Service Life40 years Active SS : 3x100% (HP SIS, LP SIS, EFWS, UPS, DG, HVAC, SW) Passive ECCS :4x50% Features: ISFSPools, IRWST, DSI into RPV, ES/GRS

5. Energy for the Future Advanced Design Features

6. Energy for the Future General Data Reactor typePWR Plant supplierASE, AREVA NP, Siemens Reactor thermal power 3012 MW Electric output1060 MW Capacity factor90 % Design Service Life60 years

7. Energy for the Future Main Equipment: RCS Reactor type PWR Russian Design VVER 1000/V 466 Reactor thermal power 3012 MW Service Life60 years Loops4 Core inlet temperature291 C Core outlet temperature321 C Coolant pressure15.7 MPa Features: - Direct Safety Injection in RPV - Emergency Steam/Gas Removal System -Lower core elevation relative to the cold legs -Larger SG and Pressurizer volume

8. Energy for the Future Main Equipment: Core FA TypeAdvansed with bow resistant skeleton FA Number 163 FR Number312 RCCA Number121 Fuel materialUO 2 - Average enrichment4.361% UO 2 - Integrated burnable absorber 5% Gd 2 O 3 Skeleton material - SG and GT Zr Alloy FP burn up66.6 MWd/kg U FR burn up61.2 MWd/kg U Average FA burn up55.0 MWd/kg U

9. Energy for the Future Main Equipment: TG Turbine K-1000-60/3000 TypeHP+4xLP Speed3000 rev/min Bypass8*125 kg/s (62% of nom. power) Generator TVV-1000-2UZ Rated output1111 MVA Voltage24 kV Frequency50 Hz

10. Energy for the Future Electrical Systems Main Transformers2x630 MVA Voltage24/400 kV Auxiliary Transformers 2x63 MVA Voltage24/6.3 kV Start up Transformers 2x63 MVA Voltage110/6.3 kV 4x100% 2x100% 4x100%

11. Energy for the Future Main Equipment: I&C Systems Safety I&C 4x100% Normal Operation I&C 4x100%

12. Energy for the Future Safety Features Safety Objectives – A two fold strategy: 1.Enhancement of the prevention level of the defense in depth safety concept, particularly to reduce significantly severe accident probability 2. Mitigation of severe accidents consequences up to and including core meltdown accidents

13. Energy for the Future Main Safety Systems Double Containment with Ventilation and Filtration Passive Heat Removal System Active ECCS Water Reserves inside the Containment (1910 m 3 ) IRWST – 750 m 3 Passive ECCS I – 4x50 m 3 Passive ECCS II – 8x120 m 3 Active SG Emergency Cooling and Blow down System Passive Fast Boron Injection System under ATWS Melted Core Catcher Large water source in the IRWST, gravity draining into the corium retention area

14. Energy for the Future Containment System Primary Containment: -pre-stressed reinforced concrete -leak tight metal liner Secondary Containment: -reinforced concrete -leak tight metal liner DBA and BDBA Conditions: - Pressure – 0.5 MPa -Temperatire – 210 C Containment Spray System : - Capacity 4x100% Hydrogen Mitigation System: -154 Catalytic recombiners - Maximum hydrogen concentration in the long term – 0.56% - Local peak hydrogen concentration in any time in dry air condition – 1.8%

15. Energy for the Future Severe Accident Management Systems Passive Heat Removal System -DHR up to 2 % of nominal power -Capacity 4x33% -Natural recirculation driven -Outside air cooling

16. Energy for the Future Severe Accident Management System Corium retention and cooling System Capacity 1x100% Strategy: -prevention of basemat concrete erosion -maintain containment integrity Measures: -core catcher on basis of a melt retention concept -water cooling from top and bottom -water-supply from external sources provided Result: -stabilization of melt on defined area -solidification of core melt within 3 to 5 days

17. Energy for the Future Severe Accident Management Systems Passive Annulus Filtering System -Convection driven by hot air -Purification Efficiency of filter unit -Aerosols – 99.9% -Molecular Iodine – 99.9% -Organic Iodine – 99.0% -Leak Purification Flow – up to 500 kg/h

18. Energy for the Future UCA 4 UCB 3 2 1 UJA UKC UKA Protection against External Hazards Reactor building, Fuel building, Safety Systems Building, Main Control Room, Remote Shut down Building - protected against the impact by design The DG Building 1, 2 and 3, 4 - protected against the impact by separation Reinforced Concrete Protection Protection by separation Standard Protection The APC protection approach shall be fulfilled by sufficient thick dimensioned outer building walls, separated from inner structures and other technical measures like physical separation

19. Energy for the Future Criteria for Limited Impact No Emergency Protection Action beyond 800 m No Long Term Action beyond 800 m Limited economic impact No Delayed Action beyond 3 km Release Targets for Design Basis Category 3 and 4 Conditions –no action beyond 800 m –limited economic impact Criteria for Limited Impact for Design Extended Conditions –no Emergency Protection Action /evacuation/ beyond 800 m –no Delayed Action /temporary relocation/ beyond 3 km –no Long Term Action /permanent resettlement/ beyond 800 m –limited economic impact

20. Energy for the Future Highlights of Evaluation V 466 Advanced Design vs V 320 Serial Design Annual Electricity ProductionAnnual Uranium Consumption Annual Spent Fuel GenerationCurrent Levelized Electricity Cost +20% -24.5% -50% -11%

21. Energy for the Future Highlights of Evaluation V 466 Advanced Design vs V 320 Serial Design Core Damage FrequencyEarly Large Release Frequency 1.5E-075.5E-10 V 320 Serial DesignV 466 Evolutionary Design Reactor Protection System1x100%1x200% Fast Boron Injection System-4x25% Safety Protection Systems including DG+UPS+I&C+HVAC+SW 3x100%4x100% Passive ECCS4x50%4x50%+4x33% Passive Heat Removal System-4x33% Melted Core Retention and Cooling System -1x100% 1E-051E-06

22. Energy for the Future Design Certification VVER AES 92 Design has successfully passed all the steps of the analysis of compliance vs European Utility Requirements for LWR Plants for 1998-2006 VVER AES 92 Design was certified in April 2007

23. Energy for the Future Conclusions Belene NPP design is based on proven and advanced technologies Evolutionary approach has been carefully selected: it is considered as the best approach for large power plants it allows to benefit fully from operating experience it minimizes the risk for investors and operators Belene NPP safety is at the highest level Belene NPP provides efficient and friendly operating and maintenance conditions Belene NPP is designed to achieve high efficiency, high availability and low operating costs

24. Energy for the Future Your Contacts