The Alvin Weinberg Foundation was a registered UK charity, operating under the name Weinberg Next Nuclear, that campaigned for research and development into next-generation nuclear energy.

In particular, it advocated advancement of liquid fluoride thorium reactor (LFTR) and other molten salt reactor (MSR) technologies.

[2] It was named for Alvin M. Weinberg, Director of Oak Ridge National Laboratory between 1955–1973 and the main advocate of MSR development.

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