The effect of heavy reflector on neutronic parameters of core

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F22%3AN0000061" target="_blank" >RIV/26722445:_____/22:N0000061 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0306454921007751" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0306454921007751</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.anucene.2021.108898" target="_blank" >10.1016/j.anucene.2021.108898</a>

Result language
angličtina
Original language name
The effect of heavy reflector on neutronic parameters of core
Original language description
The reactor baffle is an important component of a nuclear reactor that fixes the location of the fuel assembly in the reactor core. The main types of baffles are called light or heavy. The light baffle has mostly the form of steel plates with outer space filled by water, and the heavy baffle is mostly a forged steel element. Both concepts have advantages as well as disadvantages. In the case of the light baffle, one does not need to solve the issue of void swelling, but the neutron economy is not ideal, while the heavy baffle has a good neutron economy, but void swelling is an issue. This paper deals with the effect of the heavy VVER-1000 baffle on criticality. Criticality was measured using a well-defined core composed of 6 fuel assemblies moved to a simulator of the VVER-1000 internals, which is located at the LR-0 reactor. The experiments confirm the fact that the water filling the cooling channels in the baffle has a strong neutron-absorbing effect. The keff calculated using the ENDF/B-VIII.0 library significantly underpredicts the experiment. The calculations using a new evaluation of Fe-56 by the IAEA (INDEN collaboration) do not improve the situation significantly. Generally, the presented results are suitable for the validation of iron cross sections.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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