Advanced Nuclear Reactor Designs (Generation IV Reactors)

Generation IV (Gen IV) nuclear reactors are advanced reactor designs being developed as successors to current Generation III reactors. Their goals include improved safety, efficiency, cost-effectiveness, better fuel utilization, and reduced nuclear waste.

The Generation IV International Forum (GIF) has identified six key technologies for this next generation:

Technology

Coolant

Temperature (°C)

Key Features

Gas-cooled Fast Reactor (GFR)

Helium

850

High efficiency, closed fuel cycle

Sodium-cooled Fast Reactor (SFR)

Sodium

550

Fuel recycling, waste reduction

Lead-cooled Fast Reactor (LFR)

Lead

480–800

High temperature, long-term operation

Molten Salt Reactor (MSR)

Fluoride/Chloride Salt

700–800

Thorium use, high safety

Supercritical-Water-Cooled Reactor (SCWR)

Water/Sodium

510–625

High efficiency

Very High Temperature Reactor (VHTR)

Helium

900–1000

Hydrogen production, very high temperatures

Benefits and Challenges

Benefits

  • Significant reduction in nuclear waste (waste becomes inert in ....
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