China Nuclear Power Technology Research Institute

China Guangdong Nuclear Power Holding Corporation

China Nuclear Power Technology Research Institute Co. Ltd.

China General Nuclear Power Co., Ltd

Wenchi Yu

Weicai Li

Xiaoming Chen

Yan Guo

Jiayuan Wang

Yuemin Zhou

Zhengzheng Pang

Haixiang Hu

Jingwen Yan

Xianfeng Lv

Yuli Liu

A bottom nozzle includes a skirt, support blocks, transverse blades and longitudinal blades. The skirt is a hollow structure and a bottom thereof is provided with corner legs which are protruded downwards, a cavity is defined in the hollow structure, the transverse blades are configured in the cavity, the longitudinal blades are configured in the cavity, the transverse blades and longitudinal blades are firmly connected with the skirt, projections of the transverse blades and the longitudinal blades in a level plane are intersectant to form interleaved grids, and the support blocks run through and are fixed on the transverse blades and the longitudinal blades. In such a way, the bottom nozzle forms a three-dimensional gridded water passage, thereby improving the filter capacity and generating small water pressure drop.

Bottom nozzle and light-water reactor fuel assembly

A new, improved grid spacer for a nuclear fuel assembly is provided, comprising several straps which intersect each other alternatively to form a plurality of grid cells and fuel rods reside in some of the grid cells; the grid spacer further comprises mixing elements set at the corner of the grid cells in which the fuel rods have resided; wherein the mixing element comprises a mixing vane stretching towards the direction of the fuel rod and a flow funnel set on the bended edge of the mixing vane continuously and extending towards adjacent grid cells; the mixing vane and the flow funnel set across two sides of two adjacent grid cells respectively, and the flow funnel introduces the coolant in the grid cell at its side to the mixing vane, then the mixing vane introduces the coolant to the grid cell at its own side.

Advanced grid spacer design for a nuclear fuel assembly

Growing community of inventors

Shenzhen, China

Wenchi Yu