In this paper, the modeling and simulation of PWRs loaded with hexagonal fuel assemblies has been implemented NECP-Bamboo code. NECP-Bamboo, consisting a 2D lattice code named Bamboo-Lattice 3D steady-state core Bamboo-Core, was primitively designed for rectangular assemblies. As capability extension assemblies, four aspects improvement have in NECP-Bamboo. Firstly, Constructive Solid Geometry ...

• Pioneer work with large-scale naturally separated simulant material at high temperature. The turbulent flow pattern in the upper layer is influenced by boundary cooling. interlayer crust behavior reacts strongly on condition. Heat flux focusing only exists under week cooling boundary. influence of Pr number heat transfer discussed. 2D geometry effect In-Vessel Melt Retention (IVR) credited as...

The VVER-1000 thermal neutron reactor can operate on mixed uranium-plutonium fuel with a content of reactor-grade plutonium up to 5% 100% loaded core. In this case, burns 56% odd isotopes. energy potential such is very low, and its further use in reactors impractical. However, be used fast reactors. paper presents the results investigating possibility for isotopic composition BN-1200 value incr...