Ex-Core Neutron Flux Monitoring System in Graphite Prism for Gen. Iv Reactors

Fořtová, Anna; Závorka, Jiří; Škoda, Radek

doi:10.1299/jsmeicone.2019.27.1627

Cited by 1 publication

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“…Reference [1] discusses parameters and operating conditions for 4 th generation reactors and also the challenges of positioning of the neutron flux measurement. This work presents the following research of the optimal detector position in the graphite reflector.…”

Section: Introductionmentioning

confidence: 99%

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

Vilimova

Peltan

Škoda³

2021

EPJ Web Conf.

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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.

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Section: Introductionmentioning

confidence: 99%

“…Findings from the research in reference [1] were applied to the research reactor LR-0 in the Research Centre Řež. The research reactor LR-0 is a pool-type light-water reactor with zero power, which serves mainly for measuring neutronphysical characteristics of VVER type reactors.…”

Section: Introductionmentioning

confidence: 99%