Westinghouse Electric Sweden Ab

Mats Dahlbäck

Edward Jean Lahoda

Lars Hallstadius

Magnus Limbäck

James T Dougherty

John Bates

Sture Helmersson

Robert J Comstock

Carina Önneby

Anders Söderlund

Gunnar Wikmark

Jonathan Wright

Elena Calota

Britta Helmersson

Steven J King

Magnus LIMBÄCK

Steven King

Antoine Claisse

A fuel channel for a nuclear power boiling water reactor is configured to include a bundle of fuel rods with nuclear fuel. The fuel channel is made of a sheet material and has a plurality of sides which have an elongated shape and which are connected to each other such that a corner with an elongated shape is formed where two adjacent sides meet. In one or more corners, the sheet materials from the two adjacent sides overlap with each other such that there is a corner region with double sheet material consisting of the overlapping sheet material from one of the two sides and the overlapping sheet material from the other of the two sides.

Fuel channel for a nuclear power boiling water reactor

A method of manufacturing an optimized sheet metal () of a zirconium based alloy is described, which optimized sheet metal () defines a sheet plane (BA). The method comprises the steps of providing a sheet metal () of a zirconium based. alloy, subjecting the sheet metal () to at least a preparing cold rolling and a final cold rolling, wherein the preparing cold rolling and the final cold rolling are both performed in a common rolling direction, and heat treating the sheet metal () between the preparing cold rolling and the final cold rolling so that the zirconium based alloy is partially re-crystallized. A method of manufacturing a spacer grid using an optimized sheet metal () according to the invention is also described.

Spacer grid for positioning of fuel rods

The invention concerns a method of producing and treating a sheet suited to be used as a component or as a part of a component in a fuel assembly for a nuclear light water reactor, which method comprises:

Method, use and device relating to nuclear light water reactors

A method for manufacturing a sheet metal for use in a boiling water nuclear reactor and such a sheet metal. The method includes providing a material of a zirconium alloy that includes zirconium, and whose main alloying materials include niobium. The material is annealed so that essentially all niobium containing secondary phase particles are transformed to &#x3b2;-niobium particles.

Fuel box in a boiling water nuclear reactor

The invention concerns a method of producing a cladding tube for nuclear fuel for a nuclear boiling water reactor. According to the method, a tube is formed which comprises an outer cylindrical component () mainly containing zirconium and an inner cylindrical component () metallurgically bonded to the outer component (), wherein also the inner component () at least mainly contains zirconium. The inner component () has a lower recrystallization temperature than the outer component (). The cladding tube is final annealed at a temperature and during a time such that the inner component () substantially completely recrystallizes and such that the outer component () partly recrystallizes but to a lower extent than the inner component (). The invention also concerns a cladding tube, a fuel assembly for a boiling water reactor as well as the use of a cladding tube.

Method, use and device concerning cladding tubes for nuclear fuel and a fuel assembly for a nuclear boiling water reactor

A method of producing a cladding tube for nuclear fuel for a nuclear pressure water reactor includes forming a tube which at least principally consists of a cylindrical tube component of a zirconium-based alloy, where the alloying element, except for zirconium, which has the highest content in the alloy is niobium, wherein the niobium content in weight percent is between about 0.5 and about 2.4 and wherein no alloying element, except for zirconium and niobum, in the alloy, has a content which exceeds about 0.2 weight percent. The cladding tube is then annealed such that the tube component is partly but not completely recrystallized. The degree of recrystallization in the tube component is higher than about 40% and lower than about 95%. A fuel assembly for a nuclear pressure water reactor also has a plurality of such cladding tubes.

Method, use and device concerning cladding tubes for nuclear fuel and a fuel assembly for a nuclear pressure water reactor

A zirconium-based alloy, suitable for use in a corrosive environment, where it is subjected to increased radiation and comprises 0.5-1.6 percentage by weight Nb and 0.3-0.6 percentage by weight Fe. The alloy is characterised in that it comprises 0.5-0.85 percentage by weight Sn.

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Västerås, Sweden

Mats Dahlbäck