Light water reactor core and fuel assembly

摘要

The present invention relates to a light water reactor core comprising fuel which is enriched by adding plutonium or plutonium and other actinoides to a uranium containing at least one of a depleted uranium, natural uranium, a degraded uranium and a low enriched uranium, which further comprises:
fuel assemblies (1) having fuel rods (4) arranged in a triangular lattice configuration; and
at least one control rod (5) to be inserted into said fuel assemblies (1), wherein said at least one control rod (5) is employed as at least one absorption rod having an outer diameter larger than that of said fuel rods (4) and having a transverse cross-sectional area larger than the cross-sectional area of a unit lattice cell of the fuel rod (4).