Academic Journal
Temperature and LET effects on radiation-induced modifications in non-perfect polyethylenes
| العنوان: | Temperature and LET effects on radiation-induced modifications in non-perfect polyethylenes |
|---|---|
| المؤلفون: | Furtak-Wrona, K., Cornaton, M., Durand, D., Dauvois, V., Roujou, J.-L., Esnouf, S., Ferry, M. |
| المساهمون: | Service d'Etudes du Comportement des Radionucléides (SECR), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, This work is financially supported by ORANO and EDF |
| المصدر: | ISSN: 0141-3910. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | [CHIM]Chemical Sciences |
| الوصف: | International audience ; Regarding the nuclear safety, the potential accumulation of explosive gases during storage, transport and final disposal of Intermediate Level Long Lived Wastes (IL-LLW) has to be well understood and precisely evaluated. In this paper, we have investigated the Linear Energy Transfer (LET) effect that takes into account the different emitters present in the packages, but also the temperature impact in transport safety cases. We have focused our study on polyethylene, as this polymer presents one of the highest hydrogen radiation chemical yield (G$_0$(H$_2$)), and because of the explosive and inflammable nature of this gas. Chemical defects included in the polymer in the form of carbonyl (C=O) and vinyl (C=C) groups were explored. Depending on the atmosphere of irradiation, they are the main defects formed in polyethylene under irradiation and they are known to be effective energy and radical scavengers. Characterization of the chemical structure of pristine materials has been done. Hydrogen radiation chemical yields were quantified after polymers irradiation. Additionally, the carbon monoxide release was measured for polyethylenes with C=O moieties. Whatever the type of double bonds present in the polymer and whatever the irradiation conditions, hydrogen emission decreases compared to neat materials. Double bonds are effective scavenging groups to which energy is transferred regardless the irradiation nature. Underlying phenomena are explained in this work. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-03485993; https://hal.science/hal-03485993; https://hal.science/hal-03485993/document; https://hal.science/hal-03485993/file/S0141391019300473.pdf; PII: S0141-3910(19)30047-3 |
| DOI: | 10.1016/j.polymdegradstab.2019.02.002 |
| الاتاحة: | https://hal.science/hal-03485993 https://hal.science/hal-03485993/document https://hal.science/hal-03485993/file/S0141391019300473.pdf https://doi.org/10.1016/j.polymdegradstab.2019.02.002 |
| Rights: | http://creativecommons.org/licenses/by-nc/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.294E6406 |
| قاعدة البيانات: | BASE |
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