Laser centering measure system and centering measure method thereof

Abstract

The invention discloses a laser centering measure system and a centering measure method thereof. The system comprises a lower centering tool, an upper centering tool and a laser tracker; the lower centering tool is installed on two fuel guiding pins diagonally distributed on a lower reactor internals through two lower pin positioning holes on the lower centering tool, and is used to perform centering measure through a lower measure hole on the lower centering tool; the upper centering tool is installed at two split pin holes on an upper reactor core plate on an upper reactor internals through two upper pin positioning holes on the upper centering tool, and is used to perform centering measure through an upper measure hole on the upper centering tool; the laser tracker is installed inside a reactor cavity formed by the upper reactor internals and the lower reactor internals, and the laser tracker, the upper reactor internals and the lower reactor internals are at a same horizontal state; 3D measure is performed on the upper measure hole and the lower measure hole by utilizing a three-dimension figure measure software in the laser tracker, so that the measure data of all preset measure positions of the upper reactor internals and the lower reactor internals is obtained; and a reference coordinate system of the reactor internals is established for analyzing and analyzing the measure data, so that a centering measure result on the reactor internals is obtained.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a laser centering measurement system and a centering measurement method for centering and measuring internal components of nuclear island main equipment by using a laser tracker. Background technique [0002] Nuclear reactor internals are one of the most critical equipment in nuclear equipment. They mainly play the role of carrying nuclear fuel assemblies and their positioning. The guide tube is the only channel for control rods to enter the nuclear fuel assemblies. Whether the positioning is accurate or not directly affects the fuel reaction speed. The main factor controlling power. And when there is an abnormal situation in the nuclear power plant, the control rods fall quickly to play the role of emergency shutdown. The positioning of the nuclear fuel assembly is carried out by relying on the fuel guide pins on the upper and lower internal components, and its spatial pos...

AI Technical Summary

Problems solved by technology

However, mercury is liquid, and it is easy to fluctuate and make the image unstable; therefore, the requirements for the quiet environment of the site are relatively high, and the level of quietness of the site directly affects the reading value, and even cannot be measured

Moreover, the level of the operator will directly affect the value of the alignment reading. At the same time, the adjustment process of the alignment measurement is cumbersome and the efficiency is not high.

In addition, in the prior art, there is also a method of using the nadir instrument for centering measurement. This method needs to calculate the average reading, and there is a certain amount of error, which cannot be eliminated.

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