Surface functionalization to provide flexible surface sources
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| Titel: | Surface functionalization to provide flexible surface sources |
|---|---|
| Autoren: | Tuzun, Dilan, Gouraud, Charles, Chambon, Lucille, Kergadallan, Yann, Lourenço, Valérie |
| Weitere Verfasser: | Laboratoire National Henri Becquerel (CEA, LIST) (LNHB (CEA, LIST)), Département Métrologie Instrumentation & Information (CEA, LIST) (DM2I (CEA, LIST)), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Quelle: | R3C 2022 - 2es Rencontres Rayonnement Radio-Chimie ; https://cea.hal.science/cea-04155150 ; R3C 2022 - 2es Rencontres Rayonnement Radio-Chimie, Aug 2022, Nice, France |
| Verlagsinformationen: | CCSD |
| Publikationsjahr: | 2022 |
| Schlagwörter: | autoradiography, Liquid scintillation counting, grafting, Scanning Electron Micro-scope (SEM), Attenuated Total Reflectance-Fourier Transform InfraRed (ATR-FTIR) spectroscopy, beta-rays, alpha-rays, reference source, calibration, monitoring, surface contamination, dismantling, decommissioning, ionizing radiation, radioactivity, [CHIM.RADIO]Chemical Sciences/Radiochemistry |
| Geographisches Schlagwort: | Nice, France |
| Time: | Nice, France |
| Beschreibung: | International audience ; During the decommissioning and dismantling process, the initial cartography of all the surfaces is vital in classifying potential future waste, depending on their radioactivity level. Contamination monitors, commonly used to measure the surface contamination, need to be calibrated in terms of emitted flux or Bq.cm$^{-2}$ using adequate surface sources. The major drawbacks of existing reference sources is that they are not representative of real sites and their surface areas are limited (<150 cm$^2$) [1]. The objective of this study is to produce uniform, traceable, flexible surface sources with limited radiation self-absorption (for alpha and beta emitters). These sources should be non-contaminating, meaning that the radioactivity is strongly attached to their surfaces. Furthermore, the surface areas targeted are larger than those of the existing sources. To produce sources that are both thin and non-contaminating, a functionalization approach was chosen. The goal is to introduce ligand groups, which are able to bind to a radionuclide (RN), onto the surface by grafting a bi-functional molecule (Fig 1). In this context, we can consider different substrates, such as aluminum foil and polymeric surfaces. In particular, sources prepared using aluminum foil can be flexible, and they can be compared with existing sources, also made of aluminum, which comply with ISO 8769 standard [1].A two-sided literature investigation was carried out, to find the optimal molecule, to allow both the functionalization of the aluminum surface and the RN binding. As a result, three chemicals were selected. Then, four sequential steps were undertaken to produce surface sources by functionalization. The first step was cleaning, to degrease and remove any residues on the surfaces. Then, the samples were etched, to release hydroxide bonds that can be utilized in the grafting step. Next, the etched samples were immersed in different grafting solutions, prepared using the chosen chemicals. The experimental methods ... |
| Publikationsart: | conference object |
| Sprache: | English |
| Verfügbarkeit: | https://cea.hal.science/cea-04155150 https://cea.hal.science/cea-04155150v1/document https://cea.hal.science/cea-04155150v1/file/R3C-Dilan%20TUZUN_MAP.pdf https://cea.hal.science/cea-04155150v1/file/R3C_Abstract_Tuzun.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Dokumentencode: | edsbas.DD67CDE |
| Datenbank: | BASE |
Nájsť tento článok vo Web of Science | Abstract: | International audience ; During the decommissioning and dismantling process, the initial cartography of all the surfaces is vital in classifying potential future waste, depending on their radioactivity level. Contamination monitors, commonly used to measure the surface contamination, need to be calibrated in terms of emitted flux or Bq.cm$^{-2}$ using adequate surface sources. The major drawbacks of existing reference sources is that they are not representative of real sites and their surface areas are limited (<150 cm$^2$) [1]. The objective of this study is to produce uniform, traceable, flexible surface sources with limited radiation self-absorption (for alpha and beta emitters). These sources should be non-contaminating, meaning that the radioactivity is strongly attached to their surfaces. Furthermore, the surface areas targeted are larger than those of the existing sources. To produce sources that are both thin and non-contaminating, a functionalization approach was chosen. The goal is to introduce ligand groups, which are able to bind to a radionuclide (RN), onto the surface by grafting a bi-functional molecule (Fig 1). In this context, we can consider different substrates, such as aluminum foil and polymeric surfaces. In particular, sources prepared using aluminum foil can be flexible, and they can be compared with existing sources, also made of aluminum, which comply with ISO 8769 standard [1].A two-sided literature investigation was carried out, to find the optimal molecule, to allow both the functionalization of the aluminum surface and the RN binding. As a result, three chemicals were selected. Then, four sequential steps were undertaken to produce surface sources by functionalization. The first step was cleaning, to degrease and remove any residues on the surfaces. Then, the samples were etched, to release hydroxide bonds that can be utilized in the grafting step. Next, the etched samples were immersed in different grafting solutions, prepared using the chosen chemicals. The experimental methods ... |
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