Simulation of Neptunium Extraction in an Advanced PUREX Process — Model Improvement

Chen, Hongyan and Taylor, Robin J. and Jobson, Megan and Woodhead, David and Boxall, Colin and Masters, Andrew and Edwards, Scott (2017) Simulation of Neptunium Extraction in an Advanced PUREX Process — Model Improvement. Solvent Extraction and Ion Exchange, 35 (1). pp. 1-18. ISSN 0736-6299

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Abstract

Routing neptunium to a single product in spent nuclear fuel reprocessing is a significant challenge. In this work, we have further improved the simulation of neptunium extraction in an advanced PUREX flowsheet by applying a revised model of the Np(V)-Np(VI) redox reaction kinetics, a new nitric acid radiolysis model and by evaluating various models for the nitrous acid distribution coefficient. The Np disproportionation reaction is shown to have a negligible effect. The models are validated against published ‘cold test’ experimental results; the ‘hot test’ simulation suggests high neptunium radiolysis could help to achieve high recoveries using this flowsheet.

Item Type:
Journal Article
Journal or Publication Title:
Solvent Extraction and Ion Exchange
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/aacsb/disciplinebasedresearch
Subjects:
ID Code:
84067
Deposited By:
Deposited On:
18 Jan 2017 09:55
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Oct 2020 02:40