Molten salt reactor technology has attracted private funding over the last few years, and several reactor concepts are under development. Researchers say they could build a prototype of a molten-salt reactor, a safer, cleaner option for nuclear power, in 10 years. Conventional nuclear reactors have solid fuel rods that need constant cooling, typically using water under high pressure.

Meltdown-Proof Nuclear Reactors Get a Safety Check in Europe.

Molten salt reactors are a class of nuclear fission reactors which use a molten salt mixture as the primary reactor coolant and/or the fuel. In 1968, all the uranium was extracted and replaced with U-233, the fissile nuclide of the Thorium cycle. A molten salt reactor (MSR) is a type of nuclear reactor that uses liquid fuel instead of the solid fuel rods used in conventional nuclear reactors.

Seaborg is the largest reactor design start-up in Europe and they are making an ultra-compact molten salt reactor (CMSR).

Seaborg cannot meltdown and can use spent fuel. SAMOFAR (Safety Assessment of the Molten Salt Fast Reactor) is one of the major Research and Innovation projects in the Horizon 2020 Euratom research programme. Molten-salt reactors also offer inherent safety advantages: because the fuel is liquid, it expands when heated, thus slowing the rate of nuclear reactions and making the reactor self-governing. A molten salt reactor (MSR) is a class of nuclear fission reactor in which the primary nuclear reactor coolant and/or the fuel is a molten salt mixture. Safety first An experiment, called molten salt reactor experiment (MSR E) ( Prince, Ball, Engel, Haubenreich, & Kerlin, 1968 )h a s Molten salt reactor technology has attracted private funding over the last few years, and several reactor concepts are under development. MSRs use either liquid fuel or solid fuel to provide safe and sustainable benefits. One area under research is the compatibility between the salt coolant and the structural materials and, for some designs, the chemical processes related to the associated fuel cycle, Monti said.

The technology is promising in terms of safety and economy and has the potential to avoid the release of long-lived radioactive waste in the case of severe accidents. The liquid fluoride thorium reactor (LFTR; often pronounced lifter) is a type of molten salt reactor.LFTRs use the thorium fuel cycle with a fluoride-based, molten, liquid salt for fuel.In a typical design, the liquid is pumped between a critical core and an external heat exchanger where the heat is transferred to a nonradioactive secondary salt.
Construction of a test reactor called the Molten Salt Reactor Experiment (MSRE) began in 1962 using this salt (with a bit of ZrF 4), and the plant began operation in 1966.

Fluid Fluorides and Chlorides Reactor Research and Development on Molten Salt Reactors (MSRs) Papers, Books, and Reports. As it happens, the freeze-plug safety feature is as old as Alvin Weinberg's 1965 Molten Salt Reactor Experiment design, yet it meets the NRC's requirement; at ORNL, the “old nukes” would routinely shut down the reactor by simply cutting the power to the freeze-plug cooling system.

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