Inspection device for steam generator

Abstract

The invention relates to an inspection device for a steam generator, capable of inspecting whether foreign matters exist in gaps of a heat conduction tube bundle or not. In order to solve the above-described problem, an embodiment of the present invention provides an inspection device for a steam generator comprising: a flange attached to a hand hole of a steam generator; a frame attached to the flange; a pulley mounted on the frame; a guide rail mounted along the outer side of a heat conduction pipe bundle in the steam generator through the hand hole; a moving unit which is wound on the pulley and can move on the guide rail; a drive unit for driving the pulley; and a camera unit attached to the moving unit so as to be able to move forward and backward between the heat conduction pipe bundle.

Description

technical field [0001] The invention relates to a steam generator inspection device, in particular to a steam generator inspection device (inspection device for steam generator) capable of inspecting whether there are foreign objects in gaps of heat conducting tube bundles. Background technique [0002] Generally, a nuclear power plant uses a steam generator to generate the steam required to generate electricity using a steam turbine and a generator. [0003] The inside of the steam generator is equipped with a plurality of heat transfer pipes in a bundle form, and the above heat transfer pipes perform heat exchange between the primary system water containing radiant energy and the secondary system water for driving the turbine rotation , can play the function of separating the first-level system water and the second-level system water. [0004] During the steam generation process of the steam generator, the 1st stage system water which is heated in the process of passing t...

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned device adopts a method in which the operator manually inserts the endoscope camera head into the gap of the heat pipe through the guide rail, and the operator must repeatedly perform the process of inserting and taking out the endoscope camera head for confirmation. The work is complicated, and it is difficult to find the required location for confirmation, and it is more likely that there are parts that have not been confirmed

[0009] In addition, the surrounding area of ​​the steam generator is a high-radiation area that exposes workers to radiation, making it difficult to effectively perform visual inspection or foreign matter removal

Images