Speaker
Dr
Liudmila Tkachenko
(Khlopin Radium Institute)
Description
The fast reactors and related fuel cycle technologies are extensively development at present. It is possible to transmutate the radiotoxic nuclides, contained in PUREX raffinates (primarily minor actinides), in fast reactors. This raises the challenge of minor actinides recovery from PUREX raffi-nats.
The process for actinides (III) partition with solvent based on N,N,Nꞌ,Nꞌ-tetraocthyl-diglycolamide (TODGA) in meta-nitrobenzotrifluoride (F-3) was proposed. The process includes actinides (III) and REE co-extraction, Zr and Pd scrubbing, HNO3 scrubbing, selective actinides stripping with buffered DTPA solution and REE stripping. The dynamic test using mixer-settlers set-up was carried out. The feed solution contained about 4.5 g/L REE and trace amounts of 241Am. Not less 99,97 % of americium were recovered. Decontamination factor for the removal of REE from Am product was about 100. Most of the zirconium, molybdenum and palladium were in the raffinate. The testing and improving of the process will continue.
Country/Int. Organization
Russia, Rosatom
Primary author
Dr
Liudmila Tkachenko
(Khlopin Radium Institute)
Co-authors
Andrei Shadrin
(Bochvar Institute)
Mr
Dmitry Zverev
(Academician A.A. Bochvar Hi-Tech Research Institute of Inorganic Materials)
Ms
Ekaterina Kenf
(Khlopin Radium Institute)
Dr
Mikhail Alyapyshev
(ITMO University)
Dr
Mikhail Logunov
(Production Association “Mayak”)
Dr
Vasily Babain
(ITMO University)
Dr
Vitaliy Vidanov
(INSTITUTION «ITC «PRORYV» PROJECT»)
Mr
Yury Voroshilov
(Production Association “Mayak”)
