Radiolysis of C5-BTBP in cyclohexanone irradiated in the absence and precence of an aqueous phase
Artikel i vetenskaplig tidskrift, 2012

Spent nuclear fuel contains many highly ra- dioactive species; hence solvents used in reprocessing will be subjected to radiolysis. In this study, solvents containing one of the BTBP molecules intended for the separation of trivalent actinides and lanthanides, the so called C5-BTBP, have been subjected to radiolysis and hydrolysis. We present here that this compound shows a dramatic decrease in both distribution ratios and separation factor when irradiated with higher doses up to 50 kGy; particularly in the presence of an aqueous phase. Furthermore, fast hydrolytic degradation is observed, which significantly contributes to the overall degree of decomposition. This is supported by speciation studies per- formed by HPLC and LC-MS methods. Proposed structures of the highest-yield degradation products are presented and they seem to confirm previously drawn structures for these products. From these studies it can be concluded that the presence of nitric acid or nitrate during irradiation leads to higher content of species containing keto groups.

Actinide

BTBP

Diluent

Partitioning

Radiolysis

Lanthanide

Degradation product

Solvent extraction

Författare

Anna Fermvik

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Chalmers, Kemi- och bioteknik, Kärnkemi

Emma Aneheim

Chalmers, Kemi- och bioteknik, Kärnkemi

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

B. Gruner

Institute of Inorganic Chemistry of the Academy of Sciences of the Czech Republic, v.v.i.

Z. Hajkova

Institute of Inorganic Chemistry of the Academy of Sciences of the Czech Republic, v.v.i.

M. Kvicalova

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Chalmers, Kemi- och bioteknik, Kärnkemi

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Radiochimica Acta

0033-8230 (ISSN)

Vol. 100 273-282

Ämneskategorier

Kemi

DOI

10.1524/ract.2012.1908