Conference
Measuring the delayed neutrons multiplicity and kinetic parameters for the thermal induced fission of $^{235}$ U, $^{239}$ Pu and $^{233}$ U
| العنوان: | Measuring the delayed neutrons multiplicity and kinetic parameters for the thermal induced fission of $^{235}$ U, $^{239}$ Pu and $^{233}$ U |
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| المؤلفون: | Geslot, Benoit, Sardet, Alix, Casoli, Pierre, Leconte, Pierre, de Izarra, Grégoire, Chebboubi, Abdelhazize, Kessedjian, Grégoire, Méplan, Olivier, Doré, Diane, Soldner, Torsten, Mutti, Paolo |
| المساهمون: | 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), Service Physique EXpérimentale, d'essais en Sûreté et d'Instrumentation (SPESI), Département Etude des Réacteurs (DER), 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), Service Mesures et modélisation des Transferts et des Accidents graves (SMTA), Département Technologie Nucléaire (DTN), Service de Physique des Réacteurs et du Cycle (SPRC), 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Département de Physique Nucléaire (ex SPhN) (DPHN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Institut Laue-Langevin (ILL) |
| المصدر: | ISSN: 2100-014X ; EPJ Web of Conferences ; 7th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA 2021) ; https://hal.science/hal-03463145 ; 7th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA 2021), Jun 2021, Prague, Czech Republic. pp.01004, ⟨10.1051/epjconf/202125301004⟩. |
| بيانات النشر: | CCSD EDP Sciences |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Delayed neutrons, fission chambers, 3He proportional counters, fissile isotopes, uranium 235, uranium 233, plutonium 239, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] |
| جغرافية الموضوع: | Prague, Czech Republic |
| الوصف: | International audience ; In the normal operation of nuclear reactors, the kinetic behavior of the neutron population in the core is driven by the so-called delayed neutrons (DN). The DN yield per fission, their average lifetime and their groups’ abundances are the main physical parameters used to predict the kinetic behavior of the reactor and its reactivity. The overall uncertainty associated to reactivity predictions, which is linked directly to the nuclear reactor safety margins, is thus closely dependent on a few parameters associated with DN. Depending on the nuclear data library, DN kinetic parameters present significant discrepancies, even for major fissile isotopes such as $^{235}$U or $^{239}$Pu. In this context, CEA has long been working for improving DN nuclear data. In 2018, CEA launched the ALDEN project (Average Lifetime of DElayed Neutrons) in the framework of a collaboration between CEA/DES, CEA/DRF, CNRS/IN2P3 (LPSC, CENBG, LPC), ENSICAEN and Caen University. This program aims at measuring the kinetics of the delayed neutrons to derive the DN yield, their average lifetime and abundances. Two experimental campaigns focusing on the thermal fission of $^{235}$U were conducted in 2018 and 2019. They demonstrated the concept feasibility and gave high quality estimations of the DN multiplicity (1.631 ± 0.014 %) and average lifetime (8.82 ± 0.6 s) for $^{235}$U. More recently in March 2021, a more ambitious irradiation campaign was conducted on $^{239}$Pu and $^{233}$U. This paper details the new experimental setup, which was upgraded to meet ILL safety requirements for handling plutonium. The data analysis process is presented, with a focus on the problem of dead time correction. Finally, some preliminary delayed neutron decay curves are showed and discussed. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | INSPIRE: 1989783 |
| DOI: | 10.1051/epjconf/202125301004 |
| الاتاحة: | https://hal.science/hal-03463145 https://hal.science/hal-03463145v1/document https://hal.science/hal-03463145v1/file/Ges1.pdf https://doi.org/10.1051/epjconf/202125301004 |
| Rights: | http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.69BF13E8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/epjconf/202125301004 |
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