Ab Asea-atom

Abb Atom Ab

Bo Fredin

Olov Nylund

Sture Helmersson

Bo Borrman

Ingmar Andersson

The present invention relates to a fuel assembly with a substantially square cross section for a light-water reactor. The light-water reactor comprises a plurality of fuel rods (,) extending between a top tie plate (,) and a bottom tie plate (,). A fuel rod (,) comprises a cladding tube (,) with a first and a second end which surround a column with fissionable material (,). According to one aspect of the invention, at least one fuel rod (,) is provided with an axial gap (,) in the fissionable material (,), such that fissionable material (,) is arranged on both sides of the axial gap (,) in the fuel rod (,).

Nuclear fuel assembly

Fuel assembly having square cross-section and a plurality of tube elements (7,8) arranged in a square reactor lattice, at least one of said tube elements being water tubes (8) and a predominant number being fuel rods (7). Each fuel channel wall has a hollow projection (9) lying in a vertical mid-plane. The number of tube elements between two projections (9) lying in the same mid-plane is smaller than nine and greater than two. A plurality of rows of nine tube elements (7, 8) are arranged in parallel with each of the mid-planes.

Fuel assembly having water passageway in channel wall

A boiling water reactor fuel assembly is provided with an elongated, vertical stiffening device having four stiffening wings which are each attached to a wall of the fuel box. Each stiffening wing has at least one vertically directed passageway for water.

Fuel assembly

An elongated absorber plate, which is stationarily mounted in a gap between two fuel assemblies in a reactor core, comprises a plurality of absorber channels which are filled with a burnable absorber material. The channels (5b) are formed by welding to each other two confronting sheet elements (2b, 3b), of which at least one is corrugated.

Growing community of inventors

Vaster.ang.s, Sweden

Bo Fredin