Design Concept of Advanced Sodium-Cooled Fast Reactor and Related R&D in Korea

Table 1

Summary of top-tier design requirements of an SFR demonstration plant.

General design
Reactor type: pool type
Plant size: 600 MWe
Plant design lifetime: 60 years
Design basis earthquakes (SSE: 0.3 g)
Initial core: U-Zr metal fuel
Reloading core: U-TRU-Zr metal fuel
Safety and investment protection
Design simplification
Negative power reactivity coefficient
CDF < 10^−6/reactor · yr
No fuel-cladding liquid phase propagation during DBEs
Diversified core shutdown mechanism
Reliable and diversified decay heat removal
Accommodating unprotected ATWS events without any operator’s action
Large radioactivity release <10^−7/reactor · yr
3 days grace time w/o any operator’s action for design basis events
Performance and economy
Plant thermal efficiency: net > 38%
Plant availability ≥ 70%
Refueling interval: U-Zr initial core ≥ 6 months
TRU burner core ≥ 11 months
Spent fuel storage capacity in RV ≥ 1.5 cycle discharge
100% off-site load rejection w/o a plant trip
Safety grade diesel generator