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Guide tube for a control rod in a nuclear reactor

阅读：26发布：2022-12-09

专利汇可以提供Guide tube for a control rod in a nuclear reactor专利检索，专利查询，专利分析的服务。并且In a BLWR exchangeable guide tubes for cruciform control rods are indirectly supported by the bottom of the reactor vessel and carry at their upper ends square support blocks, each being provided with four holes for four fuel assemblies, said holes being symmetrically distributed around a central cruciform slot for the control rod. The support blocks are arranged in an edge to edge relationship, thus forming an even bottom for the core volume. Each guide tube has at its upper end four depressions, thereby obtaining a cruciform cross section and permitting flow of coolant from outside the tubes to the fuel assemblies.，下面是Guide tube for a control rod in a nuclear reactor专利的具体信息内容。

权利要求

1. A nuclear reactor comprising a reactor vessel, a reactor core surrounded by said vessel, and a plurality of square core support block means arranged in an edge to edge relationship to form a flat bottom for said core, a plurality of vertical tubes, each of said block means being carried by the upper end of one of said vertical tubes, a bottom part of said reactor vessel supporting said vertical tubes at least indirectly from beneath, a plurality of control rods, each vertical tube constituting a guide tube for a control rod which is vertically movable in said guide tube and has a cruciform cross section, said core comprising a plurality of vertical fuel assemblies having bottom parts, each of said block means having a central cruciform slot for admitting passage of the control rod therethrough and four through holes arranged in the four corners of a square for receiving the bottom parts of four of said vertical fuel assemblies and supporting said four fuel assemblies, wherein the improvement comprises each control rod guide tube having at its upper end four depressions and fitting against said cruciform slot, thereby forming two different flow paths for a coolant, one path leading from a space outside the guide tubes past the depressions and up through the holes into the fuel assemblies, and the other path leading from the inside of the guide tubes up through the cruciform slots to a space outside the fuel assemblies.

2. A reactor as claimed in claim 1, wherein each control rod is connected to an operating rod, a plurality of vertical leading-in tubes penetrating the bottom part of the reactor vessel, each operating rod being vertically movable in one of said leading-in tubes, and each control rod guide tube being at its lower end detachably connected to one of said leading-in tubes at its upper end.

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Guide tube for a control rod in a nuclear reactor

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