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The Use of Burnable Absorbers in Vver-Type Reactors to Reduce the Fraction of the Reactivity Margin Compensated by a Liquid System During Extended Campaigns

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Abstract

A computational and theoretical analysis was made of the use of various burnable absorbers placed in a fuel rod for the maximum reduction of the fraction of the reactivity margin compensated by a liquid system based on a boron absorber for VVER-type reactors with extended campaigns. Various arrangements of fuel rods in fuel assemblies at various contents of burnable absorbers (natural gadolinium and erbium) were considered. The analysis was performed using simplified models of fuel burnup at partial refueling, which represented the core as a periodic lattice of polycells.

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Authors and Affiliations

  1. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia

    A. R. Muzafarov & V. I. Savander

Authors
  1. A. R. Muzafarov
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  2. V. I. Savander
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Correspondence to A. R. Muzafarov or V. I. Savander.

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Translated by V. Glyanchenko

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Muzafarov, A.R., Savander, V.I. The Use of Burnable Absorbers in Vver-Type Reactors to Reduce the Fraction of the Reactivity Margin Compensated by a Liquid System During Extended Campaigns. Phys. Atom. Nuclei 85 (Suppl 2), S80–S89 (2022). https://doi.org/10.1134/S1063778822140113

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