FIELD: physics, atomic power.
SUBSTANCE: invention relates to nuclear reactors. The housing of a nuclear reactor accommodates a core, having fuel rods. The fuel rods, which are enclosed in a tubular envelope, are immersed in a primary coolant which circulates between the core and at least one heat exchanger. The fuel rods have in their upper part active areas filled with fuel and hollow working areas below the active areas.
EFFECT: low pressure level of gaseous fission fragments accumulating under the envelope of fuel elements, and providing more uniform distribution of the velocity field of the primary coolant at the input of the core.
2 dwg
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