دورية أكاديمية
In-pile qualification of the fast-neutron-detection-system
| العنوان: | In-pile qualification of the fast-neutron-detection-system |
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| المؤلفون: | Barbot, L., Fourmentel, D., Villard, J.-F., Destouches, C., Geslot, B., Vermeeren, L., Schyns, M. |
| المساهمون: | CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etude de l'Energie Nucléaire (SCK-CEN) |
| المصدر: | ISSN: 2100-014X ; EPJ Web of Conferences ; https://cea.hal.science/cea-02437051Test ; EPJ Web of Conferences, 2017, 170, pp.04025. ⟨10.1051/epjconf/201817004025⟩. |
| بيانات النشر: | HAL CCSD EDP Sciences |
| سنة النشر: | 2017 |
| المجموعة: | HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
| مصطلحات موضوعية: | Instrumentation, fast neutron, fission chamber, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] |
| الوصف: | Cet article est issu de la conférence "ANIMMA 2017" (Advancements in Nuclear Instrumentation Measurements Methods and their Applications) tenue à Liège du 19 au 23 juin 2017 ; International audience ; In order to ensure the quality and the relevance of irradiation programs in the future Jules Horowitz Reactor (JHR), the French Alternative Energies and Atomic Energy Commission (CEA) has significantly increased its research and development effort in the field of in-pile instrumentation during the last decade. Major progresses have thus been achieved in the capability to perform accurate in-pile measurements using reliable and updated techniques. A significant part of this effort have been conducted in the framework of the Joint Instrumentation Laboratory between the CEA and the Belgian Nuclear Research Centre (SCKCEN).In order to improve measurement techniques for neutron flux assessment, a unique system for online measurement of fast neutron flux has been developed and recently qualified in-pile. The Fast-Neutron-Detection-System (FNDS) has been designed to monitor accurately high-energy neutrons flux (E > 1 MeV) in typical Material Testing Reactor conditions, where overall neutron flux level can be as high as 10$^{15}$ n.cm$^{-2}$.s$^{-1}$ and is generally dominated by thermal neutrons. Moreover, the neutron flux is accompanied by a high gamma flux of typically a few 10$^{15}$$\gamma$cm$^{-2}$.s$^{-1}$, which can be highly disturbing for the online measurement of neutron fluxes. The patented FNDS system is based on two detectors allowing the simultaneous detection of both thermal and fast neutron flux. Thermal neutrons can be measured using a Self-Powered-Neutron-Detector (SPND) or a $^{235}$U miniature fission chamber, while fast neutron detection requires a miniature fission chamber with a special fissile material presenting an appropriate energy threshold, which can be $^{242}$Pu for MTR conditions. Fission chambers are operated in Campbelling mode for an efficient gamma rejection. FNDS also includes a ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | cea-02437051; https://cea.hal.science/cea-02437051Test; https://cea.hal.science/cea-02437051/documentTest; https://cea.hal.science/cea-02437051/file/201600003591.pdfTest |
| DOI: | 10.1051/epjconf/201817004025 |
| الإتاحة: | https://doi.org/10.1051/epjconf/201817004025Test https://cea.hal.science/cea-02437051Test https://cea.hal.science/cea-02437051/documentTest https://cea.hal.science/cea-02437051/file/201600003591.pdfTest |
| حقوق: | http://creativecommons.org/licenses/byTest/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.221CC303 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/epjconf/201817004025 |
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