Bismuth phosphate process

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Bismuth-phosphate process was a process used to extract plutonium from used nuclear fuel taken from nuclear reactors.[1][2] This process was used to produce all the plutonium of the atomic bomb dropped on Nagasaki in 1945. In 1952 this process was replaced by the Redox[3][4] and PUREX processes.


  1. ^ US patent 2799553, Stanley G. Thompson and Glenn T. Seaborg, "Phosphate method for separation of radioactive elements" 
  2. ^ US patent 2785951, Stanley G. Thompson and Glenn T. Seaborg, "Bismuth Phosphate Method for the Separation of Plutonium from Aqueous Solutions" 
  3. ^ "Reduction-Oxidation Plant (REDOX)". 
  4. ^ Bond, A.H.; Nash, K.L.; Gelis, A.V.; Sullivan, J.C.; Jensen, M.P. & Rao, L. (2001). "Plutonium mobilization and matrix dissolution during experimental sludge washing of bismuth phosphate, redox, and purex waste simulants" (PDF). Separation Science and Technology. M. Dekker, New York. 36 (5-6): 1241–1256. doi:10.1081/ss-100103648.