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Molten salt reactor (MSR)

What's so interesting about them?

Molten Salt Reactors (MSRs) are a unique type of nuclear reactor that have been around since the 1960s. Back then, scientists explored the idea of using liquid instead of solid materials to generate nuclear energy. While the concept was intriguing, it took a bit of a break before resurfacing in recent years.

Fuel

Fuel

These reactors use a molten fuel made up of a mixture of low enriched Uranium dissolved in Lithium and Beryllium Fluoride that is dissolved into the coolant.

Moderator

Moderator

MSRs use an unclad Graphite moderator arranged to allow the flow of salt through and around the core.

Coolant

Coolant

SFRs use liquid salts within the molten fuel mix as a coolant.

Typical technical data:

Neutron Spectrum Outlet Temperature (Degrees Celsius) Fuel Cycle Net Electrical Energy Generation seen in Development (MW)
Fast/Thermal
700-800
Closed
1000

What is happening with them today?

Today, scientists from different countries, such as France, Russia, and the USA, are working together to revive and improve MSRs. What makes MSRs interesting is their ability to not only generate electricity but also manage their waste, making them more environmentally friendly.

While these reactors aren’t fully operational yet, researchers are building smaller versions to test their capabilities. By the mid-2020s, we might witness the application of MSRs, marking a new era in electricity generation that promises to be safer, cleaner, and quite exciting from a scientific standpoint.

Matt Moore

World Nuclear Association – Generation IV Nuclear Reactors
The Generation IV International Forum – Molten Salt Reactors (MSR)
The Generation IV International Forum – Technology Systems