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2015 | 60 | 4 | 871-878
Tytuł artykułu

Reprocessability of molybdenum and magnesia based inert matrix fuels

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Języki publikacji
EN
Abstrakty
EN
This work focuses on the reprocessability of metallic 92Mo and ceramic MgO, which is under investigation for (Pu,MA)-oxide (MA = minor actinide) fuel within a metallic 92Mo matrix (CERMET) and a ceramic MgO matrix (CERCER). Magnesium oxide and molybdenum reference samples have been fabricated by powder metallurgy. The dissolution of the matrices was studied as a function of HNO3 concentration (1-7 mol/L) and temperature (25-90°C). The rate of dissolution of magnesium oxide and metallic molybdenum increased with temperature. While the MgO rate was independent of the acid concentration (1-7 mol/L), the rate of dissolution of Mo increased with acid concentration. However, the dissolution of Mo at high temperatures and nitric acid concentrations was accompanied by precipitation of MoO3. The extraction of uranium, americium, and europium in the presence of macro amounts of Mo and Mg was studied by three different extraction agents: tri-n-butylphosphate (TBP), N,Nʹ-dimethyl-N,Nʹ-dioctylhexylethoxymalonamide (DMDOHEMA), and N,N,N’,N’- -tetraoctyldiglycolamide (TODGA). With TBP no extraction of Mo and Mg occurred. Both matrix materials are partly extracted by DMDOHEMA. Magnesium is not extracted by TODGA (D < 0.1), but a weak extraction of Mo is observed at low Mo concentration.
Wydawca

Czasopismo
Rocznik
Tom
60
Numer
4
Strony
871-878
Opis fizyczny
Daty
wydano
2015-12-01
otrzymano
2015-06-19
zaakceptowano
2015-09-15
online
2015-12-30
Twórcy
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
autor
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
  • Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450, g.modolo@fz-juelich.de
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Typ dokumentu
Bibliografia
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bwmeta1.element.-psjd-doi-10_1515_nuka-2015-0124
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