Developed in 50's and 60's of previous century
- Based on general industry standards
- Only a limited number still in operation
Designed in the 70's
- Based on specific nuclear safety standards
- Safety ensured mainly by active systems
- Safety ensured generally within the design basis envelope
- Extensively used currently in the world
Design in line with the 21st century safety standards
- Design favorable for operation
- Extended reliability within extended lifetime (60 years)
- Minimized core damage probability
- Management of severe accidents (core damage sequences)
- Limited environment impact for all events
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