Hanford Plant B Reactor Tours

The B Reactor National Historic Landmark, part of the Hanford Unit of the Manhattan Project National Historical Park, is the world's first full-scale plutonium production reactor. Created as part of the top secret Manhattan Project during World War II, B Reactor produced the plutonium used in the Trinity Test (the world's first nuclear detonation) in July 1945, and the atomic bomb dropped on Nagasaki, Japan in August 1945 that contributed to the Japanese surrender and end of World War II. 

With the creation of the Manhattan Project National Historical Park in November 2015, and in partnership with the National Park Service, the Department of Energy has expanded public access to B Reactor for 2018. Tour season will run from mid-April through mid-November offered Monday through Saturday.