Deformation-controlled long-stroke split bucket assembly

Abstract

The invention relates to the nuclear power technology, and in particular discloses a long-stroke split-type hanging basket assembly capable of controlling deformation. The split-type hanging basket assembly capable of controlling deformation comprises a hanging basket barrel body, a lower reactor core plate which is fixedly connected to the lower end of the hanging basket barrel body, and a baffle which is arranged in the hanging basket barrel body; the baffle is divided into three sections; a forming plate is arranged outside the baffle; by adopting a multi-section short baffle structure, the differential temperature stress of the connection of baffles is effectively reduced and the baffle is convenient to manufacture; by adopting the forming plate, the deformation of the baffle caused by radiation thermal effect is reduced; a cooling agent runner hole corresponding to a fuel assembly is arranged on the lower reactor core plate, and meanwhile, a centering hole for the lower rector core plate and an upper reactor core plate is provided, thus the technical requirement of flow cooling of the cooling agent is met, and meanwhile the centering requirement of the lower reactor core plate and the upper reactor core plate is also met, and besides, the installation becomes more accurate and more reliable.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to a hanging basket assembly. Background technique [0002] The hanging basket component in the pressurized water nuclear reactor is the most serious component affected by temperature effect, radiation effect, temperature difference stress and flow-induced vibration in the reactor. The hanging basket assembly is a component that provides positioning and support for the fuel assembly. Severe deformation of the hanging basket assembly will cause the coolant flow channel to be blocked, and severe deformation will cause the flow channel to be blocked and the core may burn out. Therefore, controlling the stress and deformation of the hanging basket assembly and improving the vibration resistance and fatigue resistance of the structure are technical problems that designers must solve. Although the heaps in the world have not yet experienced such serious failures, the pr...

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Problems solved by technology

For example, the gap between the threaded connectors will increase with time due to corrosion, resulting in loosening of the threaded connectors. The generation of excessive gaps will also reduce vibration resistance and fatigue resistance, and in severe cases, it will affect safe use. Fault; in most nuclear reactors, the height of the active area is above 3.6m, and the coaming in the reactor is more than 4.2m long. The deformation of the coaming due to the radiation heat effect increases with the increase of the axial dimension of the coaming. The problem caused by this Unreliability has not found a good solution so far; in the pressurized water integrated reactor, since the evaporator enters the reactor, the length-to-diameter ratio of the hanging basket assembly is designed to be greater than 2 according to the design method of the scattered layout pile, and the hanging basket is added. The radial limit point of the component brings difficulties to the positioning, installation and adjustment of the hanging basket component

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