Physico chemical properties of irradiated i-SANEX diluents
The development of effective processes to recover minor actinides from spent nuclear fuel cannot leave out of consideration the evaluation of the impact of ionizing radiations on safety, fluid dynamics and extraction efficiency. It is common knowledge from the literature that radiation damage mainly...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sciendo
2015-12-01
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| Series: | Nukleonika |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nuka-2015-0118 |
| _version_ | 1818084382500454400 |
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| author | Mossini Eros Macerata Elena Giola Marco Brambilla Luigi Castiglioni Chiara Mariani Mario |
| author_facet | Mossini Eros Macerata Elena Giola Marco Brambilla Luigi Castiglioni Chiara Mariani Mario |
| author_sort | Mossini Eros |
| collection | DOAJ |
| description | The development of effective processes to recover minor actinides from spent nuclear fuel cannot leave out of consideration the evaluation of the impact of ionizing radiations on safety, fluid dynamics and extraction efficiency. It is common knowledge from the literature that radiation damage mainly affects the diluents and, indirectly, the extractants [1], but a lack of knowledge remains regarding the radiolytic behavior of innovative selective actinide extraction (i-SANEX) diluents [2, 3]. As natural prosecution of the work already performed on diluted nitric acid solutions [4], 0.44 M nitric acid solutions were irradiated in contact with a mixture of kerosene + 5 vol.% 1-octanol by a Co-60 source at 2.5 kGy/h dose rate and up to 100 kGy absorbed dose, conditions of interest for the future industrial facility. Density, viscosity, acidity, nitrate anion concentration and phase transfers were systematically measured before and after γ-irradiation. This was performed because radiation-induced modifications of these parameters may induce alterations of both the fluid dynamics and the separation performances of the extracting system. The results suggest that the fluid-dynamics of the system should be unaltered. In fact, only slight alterations of the organic phase viscosity and of the aqueous phase acidity were measured after irradiation, suggesting the occurrence of limited phase transfers and of diluent by-products formation. |
| first_indexed | 2024-12-10T19:53:00Z |
| format | Article |
| id | doaj.art-72d093287da841bb9fd2d6cdec407ad5 |
| institution | Directory Open Access Journal |
| issn | 0029-5922 |
| language | English |
| last_indexed | 2024-12-10T19:53:00Z |
| publishDate | 2015-12-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Nukleonika |
| spelling | doaj.art-72d093287da841bb9fd2d6cdec407ad52022-12-22T01:35:44ZengSciendoNukleonika0029-59222015-12-0160489389810.1515/nuka-2015-0118nuka-2015-0118Physico chemical properties of irradiated i-SANEX diluentsMossini Eros0Macerata Elena1Giola Marco2Brambilla Luigi3Castiglioni Chiara4Mariani Mario5Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: +39 02 2399 6395Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: +39 02 2399 6395Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: +39 02 2399 6395Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, ItalyDepartment of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, ItalyDepartment of Energy, Politecnico di Milano, Piazza L. da Vinci 32, Milano, I-20133, Italy, Tel.: +39 02 2399 6395The development of effective processes to recover minor actinides from spent nuclear fuel cannot leave out of consideration the evaluation of the impact of ionizing radiations on safety, fluid dynamics and extraction efficiency. It is common knowledge from the literature that radiation damage mainly affects the diluents and, indirectly, the extractants [1], but a lack of knowledge remains regarding the radiolytic behavior of innovative selective actinide extraction (i-SANEX) diluents [2, 3]. As natural prosecution of the work already performed on diluted nitric acid solutions [4], 0.44 M nitric acid solutions were irradiated in contact with a mixture of kerosene + 5 vol.% 1-octanol by a Co-60 source at 2.5 kGy/h dose rate and up to 100 kGy absorbed dose, conditions of interest for the future industrial facility. Density, viscosity, acidity, nitrate anion concentration and phase transfers were systematically measured before and after γ-irradiation. This was performed because radiation-induced modifications of these parameters may induce alterations of both the fluid dynamics and the separation performances of the extracting system. The results suggest that the fluid-dynamics of the system should be unaltered. In fact, only slight alterations of the organic phase viscosity and of the aqueous phase acidity were measured after irradiation, suggesting the occurrence of limited phase transfers and of diluent by-products formation.https://doi.org/10.1515/nuka-2015-0118densityi-sanexpartitioningradiolysisramanuv-visviscosity |
| spellingShingle | Mossini Eros Macerata Elena Giola Marco Brambilla Luigi Castiglioni Chiara Mariani Mario Physico chemical properties of irradiated i-SANEX diluents Nukleonika density i-sanex partitioning radiolysis raman uv-vis viscosity |
| title | Physico chemical properties of irradiated i-SANEX diluents |
| title_full | Physico chemical properties of irradiated i-SANEX diluents |
| title_fullStr | Physico chemical properties of irradiated i-SANEX diluents |
| title_full_unstemmed | Physico chemical properties of irradiated i-SANEX diluents |
| title_short | Physico chemical properties of irradiated i-SANEX diluents |
| title_sort | physico chemical properties of irradiated i sanex diluents |
| topic | density i-sanex partitioning radiolysis raman uv-vis viscosity |
| url | https://doi.org/10.1515/nuka-2015-0118 |
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