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Modelling of Innovative SANEX Process Maloperations

McLachlan, Fiona; Taylor, Robin; Whittaker, Daniel; Woodhead, David; Geist, Andreas



Abstract (englisch): The innovative (i-) SANEX process for the separation of minor actinides from PUREX highly active raffinate is expected to employ a solvent phase comprising 0.2M TODGA with 5 v/v% 1-octanol in an inert diluent. An initial extract / scrub section would be used to extract trivalent actinides and lanthanides from the feed whilst leaving other fission products in the aqueous phase, before the loaded solvent is contacted with a low acidity aqueous phase containing a sulphonated bis-triazinyl pyridine ligand (BTP) to effect a selective strip of the actinides, so yielding separate actinide (An) and lanthanide (Ln) product streams. This process has been demonstrated in lab scale trials at Jülich (FZJ). The SACSESS (Safety of ACtinide SEparation proceSSes) project is focused on the evaluation and improvement of the safety of such future systems. A key element of this is the development of an understanding of the response of a process to maloperations. It is only practical to study a small subset of possible maloperations experimentally and consideration of the majority of maloperations entails the use of a validated dynamic model of the process. Distribution algorithms for HNO3, Am, Cm and the lanthanides have been developed and incorporated into a dynamic flowsheet model that has, so far, been configured to correspond to the extract-scrub section of the i-SANEX flowsheet trial undertaken at FZJ in 20131. Comparison is made between the steady state model results and experimental results. Results from modelling of low acidity and high temperature maloperations are presented.


Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1016/j.proche.2016.10.016
ISSN: 1876-6196
URN: urn:nbn:de:swb:90-626432
KITopen ID: 1000062643
HGF-Programm 32.01.11; LK 01
Erschienen in Procedia chemistry
Band 21
Seiten 109–116
Bemerkung zur Veröffentlichung ATALANTE 2016 International Conference on Nuclear Chemistry for Sustainable Fuel Cycles
Lizenz: Dieses Werk ist lizenziert unter CC BY-NC-ND 4.0 International
Schlagworte TODGA; innovative SANEX; i-SANEX; process modelling; maloperation; minor actinide; lanthanide; americium; europium; solvent extraction
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