Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene
The radio-thermal ageing of silane-crosslinked polyethylene (Si-XLPE) was studied in air under different <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">γ</mi></se...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/24/4427 |
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| author | Sarah Hettal Simone Vincenzo Suraci Sébastien Roland Davide Fabiani Xavier Colin |
| author_facet | Sarah Hettal Simone Vincenzo Suraci Sébastien Roland Davide Fabiani Xavier Colin |
| author_sort | Sarah Hettal |
| collection | DOAJ |
| description | The radio-thermal ageing of silane-crosslinked polyethylene (Si-XLPE) was studied in air under different <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">γ</mi></semantics></math></inline-formula> dose rates (6.0, 8.5, 77.8, and 400 Gy·h<sup>−1</sup>) at different temperatures (21, 47, and 86 °C). The changes in the physico-chemical and electrical properties of Si-XLPE throughout its exposure were determined using Fourier transform infrared spectroscopy coupled with chemical gas derivatization, hydrostatic weighing, differential scanning calorimetry, dielectric spectroscopy and current measurements under an applied electric field. From a careful analysis of the oxidation products, it was confirmed that ketones are the main oxidation products in Si-XLPE. The analytical kinetic model for radio-thermal oxidation was thus completed with relatively simple structure–property relationships in order to additionally predict the increase in density induced by oxidation, and the adverse changes in two electrical properties of Si-XLPE: the dielectric constant <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi mathvariant="sans-serif">ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> and volume resistivity R. After having shown the reliability of these new kinetic developments, the lifetime of Si-XLPE was determined using a dielectric end-of-life criterion deduced from a literature compilation on the changes in R with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi mathvariant="sans-serif">ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> for common polymers. The corresponding lifetime was found to be at least two times longer than the lifetime previously determined with the conventional end-of-life criterion, i.e., the mechanical type, thus confirming the previous literature studies that had shown that fracture properties degrade faster than electrical properties. |
| first_indexed | 2024-03-10T03:14:59Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T03:14:59Z |
| publishDate | 2021-12-01 |
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| series | Polymers |
| spelling | doaj.art-cd28750f8a03426f8ccdf03de51e49de2023-11-23T10:16:13ZengMDPI AGPolymers2073-43602021-12-011324442710.3390/polym13244427Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked PolyethyleneSarah Hettal0Simone Vincenzo Suraci1Sébastien Roland2Davide Fabiani3Xavier Colin4Laboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers Institute of Technology, CNRS, CNAM, HESAM University, 151 Boulevard de l’Hôpital, 75013 Paris, FranceLIMES, Department of Electrical, Electronic and Information Engineering, University of Bologna, Viale del Risorgimento, 40136 Bologna, ItalyLaboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers Institute of Technology, CNRS, CNAM, HESAM University, 151 Boulevard de l’Hôpital, 75013 Paris, FranceLIMES, Department of Electrical, Electronic and Information Engineering, University of Bologna, Viale del Risorgimento, 40136 Bologna, ItalyLaboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers Institute of Technology, CNRS, CNAM, HESAM University, 151 Boulevard de l’Hôpital, 75013 Paris, FranceThe radio-thermal ageing of silane-crosslinked polyethylene (Si-XLPE) was studied in air under different <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">γ</mi></semantics></math></inline-formula> dose rates (6.0, 8.5, 77.8, and 400 Gy·h<sup>−1</sup>) at different temperatures (21, 47, and 86 °C). The changes in the physico-chemical and electrical properties of Si-XLPE throughout its exposure were determined using Fourier transform infrared spectroscopy coupled with chemical gas derivatization, hydrostatic weighing, differential scanning calorimetry, dielectric spectroscopy and current measurements under an applied electric field. From a careful analysis of the oxidation products, it was confirmed that ketones are the main oxidation products in Si-XLPE. The analytical kinetic model for radio-thermal oxidation was thus completed with relatively simple structure–property relationships in order to additionally predict the increase in density induced by oxidation, and the adverse changes in two electrical properties of Si-XLPE: the dielectric constant <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi mathvariant="sans-serif">ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> and volume resistivity R. After having shown the reliability of these new kinetic developments, the lifetime of Si-XLPE was determined using a dielectric end-of-life criterion deduced from a literature compilation on the changes in R with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi mathvariant="sans-serif">ε</mi><mo>′</mo></msup></mrow></semantics></math></inline-formula> for common polymers. The corresponding lifetime was found to be at least two times longer than the lifetime previously determined with the conventional end-of-life criterion, i.e., the mechanical type, thus confirming the previous literature studies that had shown that fracture properties degrade faster than electrical properties.https://www.mdpi.com/2073-4360/13/24/4427silane-crosslinked polyethyleneradio-thermal oxidationanalytical kinetic modeldensityelectrical propertiesstructural end-of-life criterion |
| spellingShingle | Sarah Hettal Simone Vincenzo Suraci Sébastien Roland Davide Fabiani Xavier Colin Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene Polymers silane-crosslinked polyethylene radio-thermal oxidation analytical kinetic model density electrical properties structural end-of-life criterion |
| title | Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene |
| title_full | Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene |
| title_fullStr | Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene |
| title_full_unstemmed | Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene |
| title_short | Towards a Kinetic Modeling of the Changes in the Electrical Properties of Cable Insulation during Radio-Thermal Ageing in Nuclear Power Plants. Application to Silane-Crosslinked Polyethylene |
| title_sort | towards a kinetic modeling of the changes in the electrical properties of cable insulation during radio thermal ageing in nuclear power plants application to silane crosslinked polyethylene |
| topic | silane-crosslinked polyethylene radio-thermal oxidation analytical kinetic model density electrical properties structural end-of-life criterion |
| url | https://www.mdpi.com/2073-4360/13/24/4427 |
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