Flow distribution device and nuclear reactor component with same

Abstract

The invention discloses a flow distribution device which comprises a flow distributor which is of a concave structure, wherein by virtue of the concave structure, a flow distribution cavity having an opening is formed; the flow distributor is arranged inside a pressure container in a hung mode and is located just below a nuclear reactor core; the opening of the flow distributor faces the nuclear reactor core; a central hole is additionally formed in the center of the bottom of the flow distributor in a penetrating mode and is formed just below the nuclear reactor core; a plurality of shunt holes are additionally formed in the flow distributor in a penetrating mode; under the actions of the central hole and the shunt holes, coolant can uniformly and stably flow into the nuclear reactor core, and the coolant is effectively prevented from generating a vortex under the action of the central hole, so that the uniformity and the stability of coolant flow distribution are further improved; meanwhile, since the vortex is prevented from generating, the safety and the reliability of the nuclear reactor are guaranteed and the probability of nuclear safety accidents is reduced. In addition, the invention also discloses a nuclear reactor component with the flow distribution device.

Description

technical field [0001] The invention relates to nuclear reactor equipment, in particular to a flow distribution device and a nuclear reactor assembly for optimizing the distribution of coolant in a pressure vessel. Background technique [0002] With the maturity of nuclear energy utilization technology, the safety of nuclear power plants has been continuously improved, and the construction of nuclear power plants has gradually become an important energy guarantee for national development. [0003] A certain number of fuel rods are arranged at certain intervals (such as: 15×15 or 17×17, etc.) and fixed into a bundle, which is called a reactor fuel assembly. Composed of tubes and fuel rods. Generally, reactor fuel assemblies are used in nuclear reactors for 3-5 years. Because they are in a strong neutron field, they need to withstand high temperature, high pressure, and high flow rate coolants, and at the same time they need to withstand the chemical action of fission product...

AI Technical Summary

Problems solved by technology

[0009] combine figure 2 As shown, the flow distribution skirt 50 ′ of this structure is installed in the pressure vessel 10 ′. During operation, when the coolant flows rapidly in the lower head 11 ′, due to the design defects of the flow distribution skirt 50 ′ itself and the support Part 32` blocks the coolant, so that the coolant will have a strong vortex in the lower head, causing the phenomenon that the internal components of the reactor fall off, resulting in a safety accident. Therefore, the flow distribution skirt of this structure needs to be improved urgently.

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