Not quite as wild, but there was a similar thing in Sweden 50 years ago, where an oil burner was retrofitted to the cancelled nuclear power plant at Marviken: h

Not quite as wild, but there was a similar thing in Sweden 50 years ago, where an oil burner was retrofitted to the cancelled nuclear power plant at Marviken: https://en.wikipedia.org/wiki/R4_nuclear_reactor https://en.wikipedia.org/wiki/R4_nuclear_reactor . The reactor, which was more or less completed but never loaded with nuclear fuel, was used for various experiments related to reactor safety.