Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor

The self-powered neutron detector (SPND) is a widely used flux monitor in thermal nuclear reactors. Although this is a mature technology, the current state of the art is tuned for a thermal neutron spectrum, so many of the devices currently in use lack sensitivity to fast neutrons. Because current i...

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Autores principales:	Goetz K. C., Cetiner S. M., Celik C.
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	fast-spectrum nuclear reactor instrumentation and controls nuclear reactor self-powered neutron detector sodium-cooled fast reactor versatile test reactor Physics QC1-999
Acceso en línea:	https://doaj.org/article/521f769122ba46029a70e956f73adc54
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id	oai:doaj.org-article:521f769122ba46029a70e956f73adc54
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spelling	oai:doaj.org-article:521f769122ba46029a70e956f73adc542021-12-02T17:12:46ZDevelopment of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor2100-014X10.1051/epjconf/202125305006https://doaj.org/article/521f769122ba46029a70e956f73adc542021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_05006.pdfhttps://doaj.org/toc/2100-014XThe self-powered neutron detector (SPND) is a widely used flux monitor in thermal nuclear reactors. Although this is a mature technology, the current state of the art is tuned for a thermal neutron spectrum, so many of the devices currently in use lack sensitivity to fast neutrons. Because current in SPNDs is produced through nuclear reactions with the neutron flux inside a reactor, sensitivity in SPNDs is determined by the neutron cross section of the neutron-sensitive portion of the detector, termed the emitter. This neutron cross section drops by orders of magnitude between thermal and fast neutron energies for many emitters in currently used SPNDs, with a corresponding drop in current from the detector. This paper discusses efforts to develop a fast-spectrum self-powered neutron detector (FS-SPND) that is sensitive to neutrons with energies ranging from 0.025 eV up to 1 MeV. An in-depth analysis of Evaluated Nuclear Data File (ENDF)/B-VII.1 neutron-capture cross sections was performed, and four new materials were identified that are suitable emitter candidates for use in measuring fast neutrons. All four materials are stable mid-shell nuclei in the region between doubly magic 132Sn and 208Pb. Each candidate was simulated with the Geant4 Monte Carlo simulation toolkit to optimize overall detector efficiency.Goetz K. C.Cetiner S. M.Celik C.EDP Sciencesarticlefast-spectrum nuclear reactorinstrumentation and controlsnuclear reactorself-powered neutron detectorsodium-cooled fast reactorversatile test reactorPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 05006 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fast-spectrum nuclear reactor instrumentation and controls nuclear reactor self-powered neutron detector sodium-cooled fast reactor versatile test reactor Physics QC1-999
spellingShingle	fast-spectrum nuclear reactor instrumentation and controls nuclear reactor self-powered neutron detector sodium-cooled fast reactor versatile test reactor Physics QC1-999 Goetz K. C. Cetiner S. M. Celik C. Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
description	The self-powered neutron detector (SPND) is a widely used flux monitor in thermal nuclear reactors. Although this is a mature technology, the current state of the art is tuned for a thermal neutron spectrum, so many of the devices currently in use lack sensitivity to fast neutrons. Because current in SPNDs is produced through nuclear reactions with the neutron flux inside a reactor, sensitivity in SPNDs is determined by the neutron cross section of the neutron-sensitive portion of the detector, termed the emitter. This neutron cross section drops by orders of magnitude between thermal and fast neutron energies for many emitters in currently used SPNDs, with a corresponding drop in current from the detector. This paper discusses efforts to develop a fast-spectrum self-powered neutron detector (FS-SPND) that is sensitive to neutrons with energies ranging from 0.025 eV up to 1 MeV. An in-depth analysis of Evaluated Nuclear Data File (ENDF)/B-VII.1 neutron-capture cross sections was performed, and four new materials were identified that are suitable emitter candidates for use in measuring fast neutrons. All four materials are stable mid-shell nuclei in the region between doubly magic 132Sn and 208Pb. Each candidate was simulated with the Geant4 Monte Carlo simulation toolkit to optimize overall detector efficiency.
format	article
author	Goetz K. C. Cetiner S. M. Celik C.
author_facet	Goetz K. C. Cetiner S. M. Celik C.
author_sort	Goetz K. C.
title	Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
title_short	Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
title_full	Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
title_fullStr	Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
title_full_unstemmed	Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor
title_sort	development of a fast-spectrum self-powered neutron detector for molten salt experiments in the versatile test reactor
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/521f769122ba46029a70e956f73adc54
work_keys_str_mv	AT goetzkc developmentofafastspectrumselfpoweredneutrondetectorformoltensaltexperimentsintheversatiletestreactor AT cetinersm developmentofafastspectrumselfpoweredneutrondetectorformoltensaltexperimentsintheversatiletestreactor AT celikc developmentofafastspectrumselfpoweredneutrondetectorformoltensaltexperimentsintheversatiletestreactor
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Development of a Fast-Spectrum Self-Powered Neutron Detector for Molten Salt Experiments in the Versatile Test Reactor

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