Patent ID: 6035011
Filing Date: 2000-03-07
Classification: G21C,Y02E

Abstract:
A reactor core for a boiling water nuclear reactor which includes four vertical fuel assemblies positioned around a control rod having arms that provide said control rod with a cruciform cross section, each of said four fuel assemblies being surrounded by a first and a second pair of gaps arranged transversely to and adjacent each other, which during reactor operation are filled with water, said first pair of gaps being adapted to encase two arms of said control rod, each fuel assembly containing a plurality of fuel rods containing enriched nuclear fuel material, said fuel rods being arranged between a bottom tie plate and a top tie plate, wherein at least one fuel assembly comprises a substantially pentagonally formed fuel channel with, in a cross section, four relatively long side portions and one relatively short side portion, said short side portion facing said second pair of gaps where they transversely communicate with each other.