Old reactor buildings on the Hanford Nuclear Reservation. The World War II-vintage Hanford B reactor, which made plutonium for the Nagasaki bomb, could become part of a new Manhattan Project National Historical Park. Joshua Trujillo/seattlepi.com file photo) A possible deal, being negotiated in the lame-duck Congress, would give Washington a new national historical park as well as a protected river less than an hour’s drive from Seattle.