Natrium Fast Reactor & Molten Salt Storage Simulator

CORE: CRITICAL (FAST FLUX) | LOOP: LIQUID Na POOL (1 ATM)

Thermal-Hydraulic & Dispatch Actuators Atmospheric Pool Safety Margin: +380°C to Boiling

Control Rod Insertion 35%

Modulates core reactivity & thermal kWt

Primary Sodium Pump 85%

Liquid metal pool circulation (non-pressurized)

Molten Salt Dispatch Mode Balancing (0 MWe Δ)

[-] Charge Salt Buffer | [+] Boost to 500 MWe

Coolant Moderation 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).

TerraPower Natrium Architecture Guide

1. Liquid Metal Sodium Fast Reactor (Nuclear Island)

2. Molten Salt Thermal Energy Storage (Energy Island)

3. Passive Safety & RVACS

Operational State Export