Predominance diagrams of uranium and plutonum species in both lithium chloride–potassium chloride eutectic and calcium chlorideReport as inadecuate




Predominance diagrams of uranium and plutonum species in both lithium chloride–potassium chloride eutectic and calcium chloride - Download this document for free, or read online. Document in PDF available to download.

Journal of Applied Electrochemistry

, Volume 43, Issue 12, pp 1235–1241

First Online: 28 August 2013Received: 14 May 2013Accepted: 08 August 2013

Abstract

Electro-reduction of spent nuclear fuel has the potential to significantly reduce the amount of high level waste from nuclear reactors. Typically, spent uranium and plutonium are recovered via the PUREX process leading to a weapons-grade recovery; however, electro-reduction would allow spent nuclear fuel to be recovered effectively whilst maintaining proliferation resistance. Here, we present predominance diagrams also known as Littlewood diagrams for both uranium and plutonium species in molten lithium chloride–potassium chloride eutectic LKE at 500 °C and in calcium chloride at 800 °C. All diagrams presented depict regions of stability of various phases at unit activity in equilibrium with their respective dissociated ions. The diagrams thermodynamically define the electrochemical system leading to predictions of reaction conditions necessary to electrochemically separate species. The diagrams have been constructed using a pure thermodynamic route; identifying stable species within the molten salt with an assumption of unit activity for each of the phases. These thermodynamically predicted diagrams have been compared to the limited available experimental data; demonstrating good correlation. The diagrams can also be used to predict regions of stability at activities less than unity and is also demonstrated.

KeywordsNuclear material Molten salts E-pO Electrochemical reduction Predominance diagrams Littlewood diagrams  Download fulltext PDF



Author: L. D. Brown - R. Abdulaziz - S. Simons - D. Inman - D. J. L. Brett - P. R. Shearing

Source: https://link.springer.com/







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