B Reactor Museum Association
Remembering the People. Preserving the Legacy. Sharing the History.
Who We Are
BRMA connects the past to the present by sharing Hanford’s remarkable story of science, innovation, and legacy. In partnership with the Manhattan Project National Historical Park and community organizations, we educate the public and preserve the history that shaped both our region and the world.
The World’s First Full-Scale Plutonium Production Reactor
Built in secrecy during World War II, B Reactor at Hanford launched the atomic age and changed the course of history. Now part of the Manhattan Project National Historical Park, it stands as a powerful reminder of scientific achievement, human ingenuity, and the complex legacy of the beginning of the nuclear age.
Manhattan Project
National Historical Park
Three Sites, One Park, Countless Stories.
Hanford
Home of the historic B Reactor, was built to produce plutonium for the first atomic test and the bomb dropped on Nagasaki in 1945.
Oak Ridge
Enriched the uranium used in the atomic bomb dropped on Hiroshima in 1945. Today, Oak Ridge shares its history through museums, community sites, and preserved Manhattan Project-era locations, alongside active Department of Energy research facilities.
Los Alamos
In Los Alamos, New Mexico, scientists led by Dr. J. Robert Oppenheimer designed and built the world’s first atomic weapons using materials from Oak Ridge and Hanford. Once a top-secret lab, Los Alamos is now home to the Los Alamos National Laboratory and several Manhattan Project-era sites open to the public.