The US built one dual use reactor at Hanford. The N Reactor generated weapons plutonium starting in 1963 and it also generated 800 MW of electricity from 1966 o

The US built one dual use reactor at Hanford. The N Reactor generated weapons plutonium starting in 1963 and it also generated 800 MW of electricity from 1966 on. It shut down in 1987. https://www.hanford.gov/page.cfm/NReactor https://www.hanford.gov/page.cfm/NReactor But as you say it was not the norm in the US.