Neutron flux monitoring with in-vessel fission chambers to detect an inadvertent control rod withdrawal in a sodium-cooled fast reactor
| Autor: | P. Filliatre, C. Jammes, Vasudha Verma, Carl Hellesen, S. Jacobsson Svärd |
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| Přispěvatelé: | 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 Dosimétrie, de Contrôle-commande et Instrumentation (LDCI), 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)-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)-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), Division of Applied Nuclear Physics, Uppsala University, Box 516, SE-75120 Uppsala, Sweden, Uppsala University |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
safety
Materials science [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Fission Safety design Astrophysics::High Energy Astrophysical Phenomena 020209 energy Control rod Instrumentation Nuclear engineering Nuclear Theory accidents 02 engineering and technology [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences Physics::Geophysics 010305 fluids & plasmas Sodium-cooled fast reactor Neutron flux 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Sodium Cooled Fast reactors Nuclear Experiment Monitoring system Design phase Nuclear Energy and Engineering Protection systems Fission chambers PACS |
| Zdroj: | Annals of Nuclear Energy Annals of Nuclear Energy, Elsevier Masson, 2016, 94, pp.487-493. ⟨10.1016/j.anucene.2016.04.019⟩ Annals of Nuclear Energy, 2016, 94, pp.487-493. ⟨10.1016/j.anucene.2016.04.019⟩ |
| ISSN: | 0306-4549 |
| Popis: | International audience; Neutron flux monitoring system forms an integral part of the safety design of a Generation IV sodium cooled fast reactor system. During the initial design phase of a neutron flux monitoring system, one needs to explore various locations and configurations. Diverse possibilities of detector system installation should be studied for different locations in the reactor vessel in order to detect any perturbations in the core. In this paper, we investigate the possibility of placing fission chambers beyond the lateral neutron shield, ex-core but in-vessel and study the detectability of inadvertent control rod withdrawal with these fission chambers. A generic core design of a Generation IV, 1500 MWth French sodium-cooled fast reactor is used for the study and calculations are performed with the Monte Carlo code SERPENT2. We propose certain design changes that are needed to be incorporated, w.r.t. the facilitation of neutron transport to this ex-core location. We are able to show that there is a visible signature in the fission chambers following an inadvertent control rod withdrawal in the core. The equally-spaced detectors azimuthally, are able to follow changes in the neutron flux distribution in the core. This study helps us analyze multiple detector locations and give general trends for monitoring indications to detect any perturbation in the core. |
| Databáze: | OpenAIRE |
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