Title: Position evaluation of ex-core neutron flux measurement in new type graphite reactors
Authors: Vilímová, Eva
Peltan, Tomáš
Škoda, Radek
Citation: VILÍMOVÁ, E. PELTAN, T. ŠKODA, R. Position evaluation of ex-core neutron flux measurement in new type graphite reactors. In EPJ Web of Conferences. Praha: EDP Sciences, 2021. s. 1-4. ISBN: neuvedeno
Issue Date: 2021
Publisher: EDP Sciences
Document type: konferenční příspěvek
URI: http://hdl.handle.net/11025/50950
ISBN: neuvedeno
Keywords in different language: ex-core measurement;neutron flux;graphite reflector;Serpent;KENO
Abstract in different language: 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 graphite-type 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.
Rights: © authors
Appears in Collections:Konferenční příspěvky / Conference Papers (KEE)

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