Position evaluation of ex-core neutron flux measurement in new type graphite reactors

Several concepts of new reactors use graphite. Some of them use graphite as a moderator, some of them as a reflector. There are at least two concepts of these graphitetype reactors under development in the Czech Republic. Both reactors use graphite as the reflector. An in-core measurement might be i...

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Autores principales:	Vilimova Eva, Peltan Tomas, Skoda Radek
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	ex-core measurement neutron flux graphite reflector serpent keno Physics QC1-999
Acceso en línea:	https://doaj.org/article/731cb433b7bf44f09109fb2c01dfbb56
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spelling	oai:doaj.org-article:731cb433b7bf44f09109fb2c01dfbb562021-12-02T17:12:46ZPosition evaluation of ex-core neutron flux measurement in new type graphite reactors2100-014X10.1051/epjconf/202125305005https://doaj.org/article/731cb433b7bf44f09109fb2c01dfbb562021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_05005.pdfhttps://doaj.org/toc/2100-014XSeveral concepts of new reactors use graphite. Some of them use graphite as a moderator, some of them as a reflector. There are at least two concepts of these graphitetype reactors under development in the Czech Republic. Both reactors use graphite as the reflector. An in-core measurement might be impossible to use because of various reasons, for instance, high temperature or aggressive environment. Therefore, this article focuses on ex-core neutron flux measurement system placed in the graphite reflector and the optimization of ex-core detector position. A set of experiments were performed at LR-0 reactor. The LR-0 is a light water reactor with a well-defined neutron field, which can be used for different material insertion tests and testing of its influence on criticality. Several modifications of LR-0 cores were modelled in Monte Carlo codes Serpent and KENO. A set of calculations were performed for verification of the criticality and neutron flux course in the reactor core and graphite reflector. Further investigation was focused on the influence of the presence of a graphite reflector on the neutron distribution in the reactor core. The LR-0 graphite experiments were also used to verify the calculations. Based on the results of this article, the optimal position of ex-core detectors in the graphite reflector is proposed.Vilimova EvaPeltan TomasSkoda RadekEDP Sciencesarticleex-core measurementneutron fluxgraphite reflectorserpentkenoPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 05005 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ex-core measurement neutron flux graphite reflector serpent keno Physics QC1-999
spellingShingle	ex-core measurement neutron flux graphite reflector serpent keno Physics QC1-999 Vilimova Eva Peltan Tomas Skoda Radek Position evaluation of ex-core neutron flux measurement in new type graphite reactors
description	Several concepts of new reactors use graphite. Some of them use graphite as a moderator, some of them as a reflector. There are at least two concepts of these graphitetype reactors under development in the Czech Republic. Both reactors use graphite as the reflector. An in-core measurement might be impossible to use because of various reasons, for instance, high temperature or aggressive environment. Therefore, this article focuses on ex-core neutron flux measurement system placed in the graphite reflector and the optimization of ex-core detector position. A set of experiments were performed at LR-0 reactor. The LR-0 is a light water reactor with a well-defined neutron field, which can be used for different material insertion tests and testing of its influence on criticality. Several modifications of LR-0 cores were modelled in Monte Carlo codes Serpent and KENO. A set of calculations were performed for verification of the criticality and neutron flux course in the reactor core and graphite reflector. Further investigation was focused on the influence of the presence of a graphite reflector on the neutron distribution in the reactor core. The LR-0 graphite experiments were also used to verify the calculations. Based on the results of this article, the optimal position of ex-core detectors in the graphite reflector is proposed.
format	article
author	Vilimova Eva Peltan Tomas Skoda Radek
author_facet	Vilimova Eva Peltan Tomas Skoda Radek
author_sort	Vilimova Eva
title	Position evaluation of ex-core neutron flux measurement in new type graphite reactors
title_short	Position evaluation of ex-core neutron flux measurement in new type graphite reactors
title_full	Position evaluation of ex-core neutron flux measurement in new type graphite reactors
title_fullStr	Position evaluation of ex-core neutron flux measurement in new type graphite reactors
title_full_unstemmed	Position evaluation of ex-core neutron flux measurement in new type graphite reactors
title_sort	position evaluation of ex-core neutron flux measurement in new type graphite reactors
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/731cb433b7bf44f09109fb2c01dfbb56
work_keys_str_mv	AT vilimovaeva positionevaluationofexcoreneutronfluxmeasurementinnewtypegraphitereactors AT peltantomas positionevaluationofexcoreneutronfluxmeasurementinnewtypegraphitereactors AT skodaradek positionevaluationofexcoreneutronfluxmeasurementinnewtypegraphitereactors
_version_	1718381385382625280

Position evaluation of ex-core neutron flux measurement in new type graphite reactors

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