Recovery of Pd from Spent Fuel: 4. Precipitation of Pd from Nitric Acid Solutions with Hydrazine and CO

摘要

Precipitation of palladium with hydrazine and CO from nitric acid solutions simulating process solutions formed in regeneration of spent nuclear fuel was studied. The influence of various factors on the degree of palladium recovery was studied. From 1.0-4.0 M HNO_(3) solutions, 50-90 and 70-98percent of Pd is precipitated with hydrazine and CO, respectively. Palladium recovery from simulated and real solutions formed in processing of spent nuclear fuel was studied. The decontamination factor of palladium with respect to most of elements including radionuclides was 10~(2)-10~(3).