Hydroscour test system and test method for lower tube seat of nuclear reactor fuel assembly

Abstract

A hydraulic scouring test system and test method for the lower pipe seat of a nuclear reactor fuel assembly, the system includes a circulation module composed of a double-suction pump and a closed-loop pipeline, and a foreign matter delivery pipe section, a test section, a foreign matter collector and related equipment. Test section module, flow field information collection module composed of PIV equipment, flow field processing software and LAN computer, image collection module composed of high-speed photography and local area network computer, pre-pump adjustment composed of water tank, filter and related pipelines and instruments The monitoring module is a cooling module composed of cooling pumps, cooling towers, condensers, closed pipes, valves and instruments, and a remote control module composed of electric valves, water pumps and related equipment by a programmable logic controller; the invention also provides the A systematic test method; the present invention can meet the needs of the visual test research on the hydraulic scouring performance of the lower tube base of the reactor under a large flow rate, and at the same time can achieve simple and fast 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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