Tail-end purification of americium from plutonium loading effluents using a mixture of octyl (phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide and tri-N-butyl phosphate |
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Authors: | J N Mathur M S Murali P R Natarajan L P Badheka A Banerji K M Michael S C Kapoor R K Dhumwad |
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Institution: | (1) Radiochemistry Division, Bhabha Atomic Research Centre, 400 085 Bombay, India;(2) Bio-Organic Division, Bhabha Atomic Research Centre, 400 085 Bombay, India;(3) Fuel Reprocessing Division, Bhabha Atomic Research Centre, 400 085 Bombay, India |
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Abstract: | The tail-end purification of Am from Pu loading effluents in 7.5M HNO3 containing 160 mg l–1 Am and 1.2 mg l–1 Pu has been carried out. With 0.2M CMPO+1.2M TBP in dodecane as the extractant and stripping by 0.04M HNO3+0.05M NaNO2, the Pu level is brought down to 31.2 g l–1. When the acidity was reduced to 4.2M HNO3, one contact with 20% TLA/dodecane and subsequent extraction by a mixture of CMPO and TBP and stripping with 0.04M HNO3+0.05M NaNO2 gave Am samples without any detectable amounts of Pu. The recovery of Am was 90% by the first procedure and 98% by the second one. |
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