High-temperature reactor control rod system overhaul device and technology based on ergonomics

Abstract

The invention belongs to the technical field of high-temperature gas-cooled reactor control rod system overhaul, and particularly relates to a high-temperature reactor control rod system overhaul device and technology based on ergonomics. The device comprises an atmosphere isolation main cabin, a transition cabin, an overhaul platform and an aisle, wherein the atmosphere isolation main cabin and the transition cabin are controlled to be communicated or isolated by a door II which can be automatically opened and closed; the upper end of the atmosphere isolation main cabin is fixed on the transition cabin, and the lower end is tightly held and sealed with a shielding seal barrel of a control rod drive mechanism through a seal ring; the transition cabin is supported and fixed on an upper sealhead of a pressure vessel by support legs; the overhaul platform is fixed on the supporting legs, and the aisle provides access for construction workers from the 28m platform to the transition cabin.In the overhaul process, the device and the technology not only ensure that atmosphere in the pressure vessel does not leak out, but also ensure that the construction workers do not directly enter orleave the helium environment.

Description

technical field [0001] The invention belongs to the technical field of high temperature gas-cooled reactor control rod system maintenance, and in particular relates to a high temperature reactor control rod system maintenance equipment and process based on human factors engineering. Background technique [0002] The high-temperature gas-cooled reactor is a high-temperature reactor with graphite as the moderator and helium as the coolant. It is an advanced nuclear reactor with good inherent safety and high power generation efficiency. During nuclear power plant operation, the reactor core is cooled with helium coolant. [0003] During the operation of the reactor, the control rod system is used to control the reactivity to realize different modes of operation. During long-term operation, there is a demand for dismantling and overhauling of the control rod drive mechanism and replacement of electrical components. The casing of the control rod driving mechanism of the high te...

AI Technical Summary

Problems solved by technology

Although this method has the advantages of easy on-line operation and short operation time, it also has the following disadvantages: (1) The construction personnel need to enter the working cabin with a helium environment. Although it can provide the construction personnel with a breathing supply environment, there are relatively (2) The space in the atmosphere isolation cabin is large, and the amount of helium used in the gas replacement process is large, resulting in high maintenance costs; (3) The construction personnel and the control rod drive mechanism need to perform gas replacement separately when entering and leaving the working cabin. The isolation process is more complicated

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