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Numerical Study on Thermal Hydraulics in Coated-Particle-Type Fuel Assembly of Helium Gas Cooled Fast Reactor

Ohshima, Hiroyuki; not registered

A helium-gas-cooled fast reactor with coated-particle-type fuel is being examined as a candidate of commercialized fast reactors at JNC. In this study, two kinds of numerical simulations were carried out: A whole fuel assembly simulation using AQUA code and a local detailed simulation using FLUENT code. From these results, thermal hydraulic characteristics in the fuel region were clarified and coolability was confirmed for several operation modes as rated operation, decay heat removal operation and depressurization accident.

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