Nuclear reactor fuel assembly bottom nozzle hydraulic scouring test system and test method thereof

Abstract

The invention relates to a nuclear reactor fuel assembly bottom nozzle hydraulic scouring test system and a test method thereof. The system comprises: a circulation system composed of a double suction pump and a closed loop pipeline; a test segment module composed of a foreign matter dropping tube segment, a test segment, a foreign matter collector and relevant devices; a flow field information acquisition module composed of a PIV device, flow field processing software and a local area network computer; an image acquisition module composed of a high speed camera and a local area network computer; an adjusting and monitoring module before pump, composed of a water tank, a filter, and relevant pipelines and meters; a cooling module composed of a cooling pump, a cooling tower, a condenser, a closed pipeline, a valve and a meter; and a remote control module composed of all electric valves, water pumps and relevant devices through a programmable logic controller. The invention also provides the test method of the system. The system and the method can meet needs of large-flow reactor bottom nozzle hydraulic scouring visual test researches, and also can realize simple and rapid adjustment of system parameters.

Description

technical field [0001] The invention belongs to the technical field of nuclear power equipment performance verification test research, and in particular relates to a hydraulic scouring test system and a test method for a tube seat under a nuclear reactor fuel assembly. Background technique [0002] The fuel assembly is a key component of the nuclear reactor core, consisting of a "skeleton" structure and fuel elements including spacer grids, control rod guide tubes, neutron flux measurement tubes, upper and lower nozzles. As an important part of the nuclear fuel assembly, the lower nozzle is mainly used for the support and positioning of the fuel assembly, bearing the full weight of the fuel assembly and the load from the inside of the fuel assembly, internal components and related components. At the same time, the lower nozzle is also the entrance for the coolant to enter the core, and plays the role of coolant flow distribution and foreign matter filtration. Therefore, the ...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hydraulic scouring test system and its The test method, the device and system of the present invention can realize the visual research of the hydraulic scouring phenomenon in the test section, and at the same time can achieve simple and fast adjustment of system parameters, can obtain a large number of test parameters such as pressure, pressure drop, flow rate, temperature and pass PIV technology obtains detailed flow field information after the fluid passes through the lower nozzle, so as to conduct in-depth research on the hydraulic erosion characteristics of the lower nozzle of the fuel assembly

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