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Low and high resolution gamma-ray spectroscopy for the characterization of uranium contamination

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  • معلومة اضافية
    • Contributors:
      Service Mesures et modélisation des Transferts et des Accidents graves (SMTA); Département Technologie Nucléaire (DTN); Institut de recherche sur les systèmes nucléaires pour la production d'énergie bas carbone (CEA - DES) (IRESNE); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de recherche sur les systèmes nucléaires pour la production d'énergie bas carbone (CEA - DES) (IRESNE); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Département de recherche sur les Procédés et Matériaux pour les Environnements complexes (ex-DE2D) (DPME); Institut des Sciences et technologies pour une Economie Circulaire des énergies bas carbone (ISEC); 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)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Laboratoire de Physique Subatomique et de Cosmologie (LPSC); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ); Université Grenoble Alpes (UGA)
    • بيانات النشر:
      HAL CCSD
    • الموضوع:
      2024
    • Collection:
      HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
    • نبذة مختصرة :
      International audience ; Decommissioning is the last step in the life cycle of a nuclear facility. After the evacuation of the facility components, the remaining structures such as concrete walls and floors must be controlled to ensure that no residual contamination remains. As it is a costly and time consuming activity, CEA develops fast measurement methods allowing a complete scanning of very large areas (hundreds of thousands of square meters) in legacy uranium enrichment plants based on gas diffusion, at Pierrelatte nuclear site, France. After fast alpha and beta measurements, HPGe and NaI gamma-spectroscopy detectors are used to characterize more precisely uraniumcontamination. HPGe has excellent energy resolution but requires very long acquisition times. On the contrary,NaI(Tl) detectors enable rapid measurement, but extracting the contamination signal from the natural background is difficult due to their low resolution. Using an innovative approach based on energy bands of the NaI spectra, contamination activity and enrichment are consistent with that measured with HPGe but in only 15 min vs. 65 h, and with a sufficiently low relative uncertainty of about 15 % and 20 %, respectively, on activity andenrichment. Large area NaI(Tl) detectors will allow cost-effective scanning of the Gaseous Diffusion Plant (UDG)nuclear site (hundreds of thousands of squared meters) within practical times, in complement to alpha and betacontamination detectors.
    • Relation:
      hal-04638936; https://hal.science/hal-04638936; https://hal.science/hal-04638936/document; https://hal.science/hal-04638936/file/Low%20and%20high%20resolution%20gamma-ray%20spectroscopy_Postprint_auteur.pdf; INSPIRE: 2805508
    • الرقم المعرف:
      10.1016/j.nima.2024.169549
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.DE6F749C