🛠️ Invention or technique

Molten Salt Reactor Experiment (MSRE)

Reactor de sales fundidas MSRE

Date
1965 · confidence high
Place
Oak Ridge, Tennessee, United States
Credited to
Oak Ridge National Laboratory (Alvin Weinberg)
Field
Matter & energy

What it is

A 7.4 MW thermal reactor in which the fuel was a molten fluoride salt. It ran on uranium-235 and later on uranium-233, showing the viability of the thorium cycle.

It went critical in June 1965; the programme ended in 1969 for lack of funding.

What it led to

  • next-generation molten salt reactor projects
  • the thorium fuel cycle
  • less risk of core meltdown
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Sources✓ verified 2026-11-04