Synthesis of alpha-emitting large area sources using epoxy resin
Gespeichert in:
| Titel: | Synthesis of alpha-emitting large area sources using epoxy resin |
|---|---|
| Autoren: | Chambon, Lucille, Tuzun, Dilan, Traore, Bintou-Thierme, Pierre, Sylvie, Thiam, Cheick, Lourenço, Valérie |
| Weitere Verfasser: | Laboratoire National Henri Becquerel (CEA, LIST) (LNHB (CEA, LIST)), Département d'instrumentation Numérique (CEA, LIST) (DIN (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: | ICRM 2025 - 24th International Conference on Radionuclide Metrology and its applications ; https://cea.hal.science/cea-05263939 ; ICRM 2025 - 24th International Conference on Radionuclide Metrology and its applications, May 2025, Paris, France. , 2025 ; https://icrm2025.org/ |
| Verlagsinformationen: | CCSD |
| Publikationsjahr: | 2025 |
| Schlagwörter: | monitoring, detector, reference source, alpha spectrometry, autoradiography imaging, spectrometry, Alpha-rays, Am-241, Epoxy resin, liquid scintillation counting, nuclear instrumentation, instrumentation, metrology, calibration, radiological characterization, radioactive waste, dismantling, decommissioning, ionizing radiation, radioactivity, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [CHIM.RADIO]Chemical Sciences/Radiochemistry |
| Geographisches Schlagwort: | Paris, France |
| Beschreibung: | International audience ; During the decommissioning and dismantling (D&D) of nuclear facilities, the radioactive waste generated is sorted into categories (high/low activity; short-/long-lived radionuclides), to enable efficient waste management. A key part of this process is the radiological characterization of all the potentially contaminated surfaces, using contamination monitors. One way to improve the surface contamination measurements, and thus reduce its cost, is to improve the calibration of the monitors. Reference surface sources are commonly used, following the ISO 8769 standard. They are planar, with the radioactive material embedded in a thin layer on top of an aluminum substrate. These reference surface sources are ideal, but very different from the contaminated surfaces analysed on-site, which can be rough or curved, and consist of concrete, paint or steel. In addition, the contamination may be embedded in the bulk of the material, not just on the surface. This can change the amount and energy of the detected radiation compared to the reference sources, which can introduce a bias in measurements. Epoxy resin can be used to produce traceable non-ideal surface sources that are closer to the surfaces found in D&D sites: rough and curved surfaces [1]. In this study, rough surfaces spiked with Am-241 were obtained by moulding the resin, or by adding sand as a filler, and curved surfaces were obtained by a plastic deformation during the resin curing process. These surfaces were measured by alpha spectrometry and autoradiography imaging. There was no difference between the alpha particle emission from a flat surface and a moulded rough surface, meaning that the particles emitted from the extra surface created by the roughness, do not reach the detector. However, more signal was detected from the sand filled resin sources. A major drawback of spiked alpha-emitting epoxy resin sources is that the self-absorption of radiation in the source material is high, limiting the alpha flux. To keep the ... |
| Publikationsart: | conference object still image |
| Sprache: | English |
| Verfügbarkeit: | https://cea.hal.science/cea-05263939 https://cea.hal.science/cea-05263939v1/document https://cea.hal.science/cea-05263939v1/file/Poster-Sources_ICRM-2025-v2.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Dokumentencode: | edsbas.6959B96C |
| Datenbank: | BASE |
Nájsť tento článok vo Web of Science | Abstract: | International audience ; During the decommissioning and dismantling (D&D) of nuclear facilities, the radioactive waste generated is sorted into categories (high/low activity; short-/long-lived radionuclides), to enable efficient waste management. A key part of this process is the radiological characterization of all the potentially contaminated surfaces, using contamination monitors. One way to improve the surface contamination measurements, and thus reduce its cost, is to improve the calibration of the monitors. Reference surface sources are commonly used, following the ISO 8769 standard. They are planar, with the radioactive material embedded in a thin layer on top of an aluminum substrate. These reference surface sources are ideal, but very different from the contaminated surfaces analysed on-site, which can be rough or curved, and consist of concrete, paint or steel. In addition, the contamination may be embedded in the bulk of the material, not just on the surface. This can change the amount and energy of the detected radiation compared to the reference sources, which can introduce a bias in measurements. Epoxy resin can be used to produce traceable non-ideal surface sources that are closer to the surfaces found in D&D sites: rough and curved surfaces [1]. In this study, rough surfaces spiked with Am-241 were obtained by moulding the resin, or by adding sand as a filler, and curved surfaces were obtained by a plastic deformation during the resin curing process. These surfaces were measured by alpha spectrometry and autoradiography imaging. There was no difference between the alpha particle emission from a flat surface and a moulded rough surface, meaning that the particles emitted from the extra surface created by the roughness, do not reach the detector. However, more signal was detected from the sand filled resin sources. A major drawback of spiked alpha-emitting epoxy resin sources is that the self-absorption of radiation in the source material is high, limiting the alpha flux. To keep the ... |
|---|