NPS/Burghart Waysides & ExhibitsExplore waysides and exhibit panels in Hanford's B Reactor. The B Reactor was the first full-scale plutonium production reactor in the world. Reaching criticality in September of 1944, the B Reactor's sole purpose during the Manhattan Project was to produce plutonium for the Gadget, the world's first atomic test device, and for Fat Man, the plutonium-fueled atomic bomb dropped on Nagasaki, Japan on August 9, 1945. 
Atomic Culture Room
Explore the history of atomic culture at the B Reactor. 
Health Physics Room
Learn about health physics at the B Reactor. 
History Room
Learn about the history of Hanford and the B Reactor. |
Last updated: April 17, 2025