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Mikael Nilsson, Sofie Andersson, Christian Ekberg, M. R. S. Foreman, M. J. Hudson, Gunnar Skarnemark

Inhibiting radiolysis of BTP molecules by addition of nitrobenzene

Keywords: Liquid-liquid extraction, Radiolysis, Americium, Nitrogen heterocycles, Triazines

Autoradiolysis of extraction systems sometimes occurs during reprocessing of spent fuel, which may result in a change in the extraction behaviour of the system. In the work reported here, an aromatic heterocyclic nitrogen bearing tridentate extraction agent, 2,6-di(5,6-diethyl-1,2,4-triazin-3-yl)pyridine (a BTP), was irradiated using a ⁶⁰Co source. The investigation focused on the effect of changing the organic diluent in the extraction system in order to protect the extracting agent from degradation.
A relationship between the distribution ratio and extracting agent concentration was determined, and it was found that the extraction efficiency decreased with increasing irradiation dose.
The effect on extraction of the degradation products from the organic diluents was also considered.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 94, 02/2006
Pages: 103 - 106

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