Transcript Slide 1

Energy for the Future
Belene NPP
Design Features
Jordan Georgiev
BNPP Manager
28 - 30 May, 2008
Riviera Holiday Club, Varna, Bulgaria
Energy for the Future
Content
• Original BNPP Design
• Advanced Design Features
– Main Equipment
– Safety Features
• Highlights of Evaluation
• Your Contacts
Energy for the Future
Original BNPP Design
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 Life
40 years
Active SS:
3x100%
(HP SIS, LP SIS, EFWS,
UPS, DG, HVAC, SW)
Passive ECCS:
4x50%
Features:
ISFSPools, IRWST, DSI into RPV,
ES/GRS
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Advanced Design Features
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General Data
Reactor type
Plant supplier
Reactor thermal power
Electric output
Capacity factor
Design Service Life
PWR
ASE, AREVA NP, Siemens
3012 MW
1060 MW
90 %
60 years
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Main Equipment: RCS
Reactor type
PWR Russian Design
VVER 1000/V 466
Reactor thermal power
3012 MW
Service Life
60 years
Loops
4
Core inlet temperature
291 C
Core outlet temperature
321 C
Coolant pressure
15.7 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
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Main Equipment: Core
FA Type
FA Number
FR Number
RCCA Number
Advansed with
bow resistant skeleton
163
312
121
Fuel material
UO2
- Average enrichment
- Integrated burnable absorber
Skeleton material
4.361% UO2
5% Gd2O3
- SG and GT
Zr Alloy
FP burn up
FR burn up
Average FA burn up
66.6 MWd/kg U
61.2 MWd/kg U
55.0 MWd/kg U
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Main Equipment: TG
Turbine
K-1000-60/3000
Generator
Rated output
Voltage
Frequency
TVV-1000-2UZ
1111 MVA
24 kV
50 Hz
Type
Speed
Bypass
HP+4xLP
3000 rev/min
8*125 kg/s (62% of nom. power)
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Electrical Systems
Main Transformers
Voltage
2x630 MVA
24/400 kV
Auxiliary Transformers 2x63 MVA
Voltage
24/6.3 kV
Start up Transformers
Voltage
4x100%
2x100%
4x100%
2x63 MVA
110/6.3 kV
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Main Equipment: I&C Systems
Safety I&C
4x100%
Normal Operation I&C
4x100%
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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
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Main Safety Systems
Double Containment with
Ventilation and Filtration
Passive Heat Removal
System
Active ECCS
Water Reserves inside the
Containment (1910 m3)
IRWST – 750 m3
Passive ECCS I – 4x50 m3
Passive ECCS II – 8x120 m3
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
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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%
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Severe Accident Management Systems
Passive Heat Removal System
-DHR up to 2 % of nominal power
-Capacity 4x33%
-Natural recirculation driven
-Outside air cooling
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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
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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
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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
UCA
UKC
Reinforced Concrete Protection
UJA
UKA
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
3
4
2
1
UCB
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Criteria for Limited Impact
• 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
No Emergency Protection Action beyond 800 m
No Long Term Action beyond 800 m
No Delayed Action beyond 3 km
Limited economic impact
Highlights of Evaluation
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V 466 Advanced Design vs V 320 Serial Design
Annual Electricity Production
V 466
Annual Uranium Consumption
V 466
-24.5%
+20%
V 320
V 320
0
50
100
150
0
50
100
%
150
%
Annual Spent Fuel Generation
V 466
Current Levelized Electricity Cost
V 466
-11%
-50%
V 320
V 320
0
50
100
%
150
0
50
100
%
150
Highlights of Evaluation
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V 466 Advanced Design vs V 320 Serial Design
Core Damage Frequency
V 466
1.5E-07
V 320
Early Large Release Frequency
V 466
1E-05
5.5E-10
V 320
1E-06
V 320 Serial Design
V 466 Evolutionary Design
1x100%
1x200%
-
4x25%
3x100%
4x100%
4x50%
4x50%+4x33%
Passive Heat Removal System
-
4x33%
Melted Core Retention and Cooling
System
-
1x100%
Reactor Protection System
Fast Boron Injection System
Safety Protection Systems
including DG+UPS+I&C+HVAC+SW
Passive ECCS
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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
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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
Energy for the Future
Your Contacts