Segmented Core Measurement Detector Protective Cover Device

Abstract

The invention discloses a segmented protection cover device for a reactor core measuring detector, relates to a nuclear power equipment reactor pressure vessel reactor core measuring system, and specifically provides a device for providing reliable guide and protection functions for detector assemblies to enter a pressure vessel through a pressure vessel top lid. The protection cover device is a segmented structure, and comprises an end head, a segmented protection cover body and spacers; the end head is connected with the segmented protection cover body through a screw thread; one spacer is installed at each segment of the segmented protection cover body; and the outer wall of the segmented protection cover body is provided with a plurality of axially communicating mounting grooves, and the detector assemblies are installed in the mounting grooves, and are bundled and fixed through stainless steel wires. The device provided by the invention has the advantages of a novel structure, simple processing, a light weight, high rigidity and strength, quick installation and use, convenient maintenance, improved working efficiency and the like, so that the device belongs to a novel segmented protection cover device integrating economy and practicality for the reactor core measuring detector.

Description

technical field [0001] The segmented core measurement detector protection cover device of the present invention relates to a nuclear power equipment reactor pressure vessel core measurement system, and specifically provides reliable guidance and protection functions for the detector assembly to enter the pressure vessel through the top cover of the pressure vessel a device. Background technique [0002] The core measurement system includes the core neutron flux measurement signal processing system, the core cooling monitoring system signal processing equipment, the core neutron-temperature detector assembly and the pressure vessel liquid level measurement detector assembly, which can monitor the core in real time. The three-dimensional power distribution of the core can be calculated in real time through the signals of sub-flux distribution, temperature and water level at key points. Therefore, whether the detector assembly can operate safely and reliably directly affects w...

AI Technical Summary

Problems solved by technology

[0003] In the nuclear reactor core measurement system independently designed and built in my country, the protective cover of the detector assembly mostly refers to foreign drawings, and adopts an on-site integral welded structure. After the first installation is completed, the disassembly is cumbersome and time-consuming due to the limited operating space of the container during the second inspection. It is laborious and affects the efficiency of maintenance; the existing protective cover structure mostly adopts a thin-walled long cylindrical shell structure due to space constraints, which has insufficient strength and rigidity, and is prone to bending deformation due to a slight external force during guidance, which in turn leads to accidents that damage the detector components.

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