1. Core physics. Neutronics and thermohydraulics

The boiling water reactor (BWR) core (figure 1 ) is cylindrical. Fuel rods are arranged in assemblies or casings (assemblies ranging from 7 × 7 to 10 × 10 rods), between which are inserted cruciform control rods. Flux detectors are distributed throughout the core at several levels. Antimony-beryllium neutron sources are also installed to control divergence at reactor start-up (table 1 ).

ABWR tank and internal structures (GE Co)

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Core physics. Neutronics and thermohydraulics

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Bibliography

(1) - HEDIN (F.) - Les critères de choix pour la technologie eau légère. - RGN 2009, n° 3, mai-juin 2009.
(2) - GUIDEZ (J.), CEA - La R du CEA dans le domaine combustible. - RGN 2009, n° 3, mai-juin 2009.
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