Fuel assembly for a nuclear reactor and a nuclear reactor core comprising such fuel assemblies专利检索-燃料组件堆芯核反应堆核能专利检索查询-专利查询网

Fuel assembly for a nuclear reactor and a nuclear reactor core comprising such fuel assemblies

阅读：535发布：2022-11-28

专利汇可以提供Fuel assembly for a nuclear reactor and a nuclear reactor core comprising such fuel assemblies专利检索，专利查询，专利分析的服务。并且A fuel assembly in which the fuel rods are arranged in a hexagonal or square, regular pattern, but in which single rods are omitted systematically and deflectors substituted therefor, each deflector normally being situated in a duct, the partition of which consists of six or eight fuel rods, respectively. The deflectors are rigidly connected to grids between the fuel rods so that the rods may expand freely in the grids.，下面是Fuel assembly for a nuclear reactor and a nuclear reactor core comprising such fuel assemblies专利的具体信息内容。

权利要求

1. A fuel assembly for a boiling water nuclear reactor comprising: a plurality of parallel fuel rods arranged in groups in a regular repeating geometric figure, each group having a center, an elongated deflector surrounded at a distance by at least six fuel rods for deflecting a steam-water mixture flowing in its axial direction and thereby causing a substantial separation of water from steam by that deflector, the axis of said elongated deflector containing said centers and being generally parallel with axes of the surrounding fuel rods, a plurality of grids axially spaced apart on the assembly interconnecting said groups so as to permit axial expansion of the rods while supporting them against movement perpendicular to their axes, said grids having a pluraltiy of annular parts into which the deflectors fit, said elongated deflector passing through said plurality of grids.

2. The assembly of claiM 1 in which said geometric figure is an isosceles triangle, each deflector being in the vertex of a group having six surrounding fuel rods, each of which also forms part of an adjacent group.

3. The assembly of claim 1 in which said geometric figure is a square, each deflector being in a group having eight surrounding fuel rods, each of which is also a part of an adjacent group.

4. The assembly of claim 1 in which comprise a plurality of annular parts into which the said annular parts are joined together by segments which define positions for holding said fuel rods.

5. The assembly of claim 1 in which the deflectors are generally helical in shape.

6. The assembly of claim 5 in which the deflectors are helical so as to force water to their peripheries while permitting generally axial passage of steam.

7. The assembly of claim 1 in which the deflectors are of approximately the same length as the rods.

8. The assembly of claim 1 in which the deflectors are extruded sections having at least three vanes twisted in a helical pitch.

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