The separation of99Mo from low-enriched uranium (LEU, 19.5%235U) targets was evaluated using natural uranium (NU) and non-radioactive tracers. Neutron activation analysis was used to determine (1) the efficiency of molybdenum recovery and (2) the decontamination factor of numerous fission product elements from the molybdenum product. Using NU and non-radioactive elements simplified procedures and allowed tests to be completed in a fume hood instead of a shielded cell. During activation of the non-radioactive tracers, uranium fission occurs, which can interfere with subsequent gamma-ray analysis. A comparison was made of the interferences caused by these fission products from both NU and LEU.
Authors:P. Tkac, A. Paulenova, G. Vandegrift, and J. Krebs
There was a significant research progress achieved with the aim to modify conventional PUREX process by stripping of plutonium
from the tri-n-butyl phosphate (TBP) extraction product in the form of non-extractable complexes upon addition of back-hold
complexation agents. The present paper reports effects of such salt-free complexant, acetohydroxamic acid (HAHA), on distribution
ratio of Pu(IV) under wide concentration of nitric acid and additional nitrate. General formula of plutonium species present
in the organic phase can be described as Pu(OH)x(AHA)y(NO3)4−x−y·2TBP·wHNO3.