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Radiolysis of C5-BTBP in cyclohexanone irradiated in the absence and precence of an aqueous phase

Anna Fermvik (Institutionen för kemi- och bioteknik, Kärnkemi ; Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Emma Aneheim (Institutionen för kemi- och bioteknik, Kärnkemi ; Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; B Grüner ; Z Hájkovà ; M Kvicalová (Institutionen för kemi- och bioteknik, Kärnkemi ; Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi ; Institutionen för kemi- och bioteknik, Industriell materialåtervinning)
Radiochim Acta (0033-8230). Vol. 100 (2012), 4, p. 273-282.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Radiolysis, Degradation product, Solvent extraction, Partitioning, BTBP, Actinide, Lanthanide, Diluent



Denna post skapades 2012-04-13. Senast ändrad 2016-12-05.
CPL Pubid: 156622

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)
Institutionen för kemi- och bioteknik, Industriell materialåtervinning (2007-2014)

Ämnesområden

Kemi

Chalmers infrastruktur