Westinghouse Electric Sweden Ab

Westinghouse Electric Ab Sweden

Anders Söderlund

Lars Hallstadius

Mats Dahlbäck

Håkan Söderberg

Markus Månsson

Sven Pettersson

A fuel assembly for a nuclear water reactor having an upstream end, a downstream end, and a flow interspace between the upstream and downstream ends. Fuel rods are provided in the flow interspace between the upstream and downstream ends. The flow interspace permits a flow of coolant through the fuel assembly along a flow direction from the upstream end to the downstream end. A filter device is provided to catch debris particles in the flow of coolant. The filter device has a first filter zone for a major part of the flow of coolant, and a second filter zone for a minor part of the flow of coolant. The first filter zone has a first filtering efficiency and the second filter zone has a second filtering efficiency. The second filtering efficiency is higher than the first filtering efficiency.

Filter zones with different filtering efficiencies for a fuel assembly of a nuclear water reactor

A method of making a fuel channel for a fuel assembly for a nuclear power boiling water reactor. The method includes providing at least one first sheet of a Zr-based material of a first thickness, and providing at least one second sheet of a Zr-based material of a second thickness which is less than said first thickness. It also includes assembling at least said at least one first sheet and said at least one second sheet, such that a fuel channel is formed and such that said at least one first sheet forms a lower part of the fuel channel. The at least one second sheet forms a higher part of the fuel channel and the lower part is joined with said higher part. The lower part constitutes 20-75% of the length of the fuel channel.

Fuel channel for a nuclear boiling water reactor

The invention refers to a filter () for separating particle from cooling water in a nuclear plant, and a fuel assembly with such a filter. The filter has an inlet end () and an outlet end () and permits through-flow of the cooling water in a main flow direction (x). The filter includes a number of sheets () extending in the flow direction from the inlet end to the outlet end. The sheets are arranged beside each other and form passages for the cooling water. The sheets include a first portion (') extending from the inlet end (), a second portion (&#x2033;) extending from the outlet end (), and a third portion (&#x2032;&#x2033;) extending between the first portion (&#x2032;) and the second portion (&#x2033;). The sheets () have along the first portion continuous wave-shape extending in a direction (y) transversally to the flow direction (x) and along the third portion a continuous wave-shape extending in the flow direction (x).

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Surahammar, Sweden

Anders Söderlund