Eastern European nuclear plants safety : VVER reactor safety

VVER reactor safety
Eastern European nuclear plants safety

Authors : Vassili BORZOV, Jean-Luc Chambon, Michel CHOUHA, Borislav DIMITROV, Christophe HERER, Jean-Marie MATTÉI

Publication date: January 10, 2012 | Lire en français

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3. VVER reactor safety

VVERs are pressurized water reactors whose main functional characteristics are similar to those of Western reactors (refer to [BN 3 101] for general description). However, there are some notable differences :

materials (steel grades used) ;
the design of steam generators, which are horizontal in the case of VVER ;
the fuel, with uranium oxide pellets with a central hole and rods distributed according to a triangular pitch ;
two different levels for hot branch outlets and cold branch inlets ;

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VVER reactor safety