Na

Natrium Fast Reactor & Molten Salt Storage Simulator

TerraPower 345 MWe Base / 500 MWe Peak Decoupled Energy Architecture
CORE: CRITICAL (FAST FLUX) | LOOP: LIQUID Na POOL (1 ATM)
Thermal-Hydraulic & Dispatch Actuators Atmospheric Pool Safety Margin: +380°C to Boiling
35%
Modulates core reactivity & thermal kWt
85%
Liquid metal pool circulation (non-pressurized)
Balancing (0 MWe Δ)
[-] Charge Salt Buffer | [+] Boost to 500 MWe
Fast (Liquid Na)
Shows non-moderating fast neutron spectrum
Generation & Storage Balance GRID SYNCHRONIZED
Grid Dispatch
345.0MWe
Reactor Island
840.0MWth
Hot Salt Tank (560°C)
64.5%
Cold Salt Tank (290°C)
35.5%
Core Thermal-Hydraulics Pool Design
Core Outlet Temp
500°C
Core Inlet Temp
370°C
Neutron Energy (Avg)
210keV
System Pressure
1.02bar
Why Sodium & Molten Salt?

1. Fast Neutrons: Unlike water in light-water reactors, liquid sodium (atomic mass 23) does not moderate (slow down) fission neutrons. Fast neutrons extract more energy from fuel and burn transuranic waste.

2. Atmospheric Safety: Sodium boils at 883°C, so the pool operates near 1 atm with no explosive high-pressure containment.

3. Grid Flexibility: Molten salt thermal storage decouples base 345 MWe nuclear heat to burst 500 MWe on demand.

Transient & Safety Log
[INIT] Natrium simulator initialized in 345 MWe nominal steady-state.
[SYSTEM] Fast neutron fission established (k_eff = 1.0000).
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