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Grids with Mixing Elements for VVER Fuel Assemblies

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Atomic Energy Aims and scope

Grid designs with mixing elements for VVER FA and experimental studies of their thermohydraulic and mass transfer characteristics are analyzed. The Novosibirsk Chemical Concentrates Plant and the Machine Building Plant manufacture the grids. Comparative assessments of the coolant mixing intensity, increase of the critical heat flux and critical power, and coefficient of hydraulic resistance are made on the basis of studies performed on VVER FA models with mixing grids as well as with and without mixing spacer grids. It is shown in FA models that mixing grids used in the advanced TVS-2M and TVSA assemblies increases the critical power for operating parameters close to the nominal VVER-1000 FA by 5.1–14% and 10–12%, respectively.

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  1. State Science Center of the Russian Federation – Leipunskii Institute for Physics and Power Engineering (IPPE), Obninsk, Russia

    N. I. Perepelitsa

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  1. N. I. Perepelitsa
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Correspondence to N. I. Perepelitsa.

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Translated from Atomnaya Énergiya, Vol. 128, No. 3, pp. 123–130, March, 2020.

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Perepelitsa, N.I. Grids with Mixing Elements for VVER Fuel Assemblies. At Energy 128, 129–135 (2020). https://doi.org/10.1007/s10512-020-00663-x

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  • DOI: https://doi.org/10.1007/s10512-020-00663-x

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