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- Title
Development of a new flowsheet for partitioning of long-lived radionuclides from high-level wastes: the "CRAMEX" process.
- Authors
Tkachenko, Lyudmila; Kenf, Ekaterina; Babain, Vasiliy; Alyapyshev, Mikhail
- Abstract
A flowsheet for a novel CRAMEX (crown ether and amide for the extraction) process has been developed. The solvent system proposed is a combination of 0.3 M N,N,N′,N′-tetraoctyl diglycolamide (TODGA) and 0.2 M dibenzo-21-crown-7 (DB21C7) in polar fluorinated diluents that co-extracted cesium, strontium, actinides and lanthanides. The stripping of cesium and strontium from the loaded organic phase can be carried out with diluted nitric acid solutions (< 0.1 M HNO3). A mixture of 0.5 M methylamine carbonate and 10 g/l DTPA provides stripping of actinides and lanthanides.
- Subjects
RADIOACTIVE wastes; CROWN ethers; RARE earth metals; ACTINIDE elements; RADIOISOTOPES; CESIUM; STRONTIUM
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 9, p4001
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08453-4