Laser welding pipe plugging device and method for water supply end of high-temperature gas cooled reactor steam generator

Abstract

The steam generator is one of key equipment in a high-temperature gas cooled reactor nuclear power system. A steam generator heat transfer pipe is an important component of a loop pressure boundary and is an important barrier for preventing radioactive fission products from leaking. A heat transfer pipe is prone to causing serious damage accidents under the action of high temperature, high pressure and high radiation for a long time, and therefore blocking operation on the heat transfer pipe in the early stage of a fault is crucial. The invention provides a high-temperature gas cooled reactor steam generator water supply end laser welding pipe plugging device and method based on a multi-axis robot and a laser welding process aiming at a special structure of a high-temperature gas cooled reactor steam generator water supply end. By means of the device, the water supply end pipe plugging operation precision and the automation degree can be improved, and the manual operation time is shortened. The invention provides an innovative solution for laser welding pipe plugging at the water supply end of the steam generator of the high-temperature gas cooled reactor nuclear power station.

Description

technical field [0001] The invention belongs to the field of nuclear power technology and equipment, and in particular relates to a laser welding plugging device and method for a water supply end of a steam generator of a high-temperature gas-cooled reactor nuclear power plant. Background technique [0002] The high-temperature gas-cooled reactor (HTR-PM) nuclear power plant has good economy and high efficiency, and is considered by the nuclear energy community as one of the most promising reactor types to meet the requirements of the fourth-generation advanced nuclear energy equipment system. Steam generator (SG) is one of the most critical equipment in high temperature gas-cooled reactor (HTR-PM) nuclear power system. The steam generator is a heat exchange device that transfers the thermal energy of the reactor to the medium of the secondary circuit to generate steam, and is the hub of the primary and secondary circuits. The working medium of the primary circuit is radioa...

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Problems solved by technology

For the laser welding pipe plugging technology of the water supply end of the high temperature gas-cooled reactor steam generator, the main problems are: (1) How to realize the laser welding pipe plugging process according to the special structure of the water supply end? (2) How to improve the automation of laser welding plugging operations at the water supply end of the reactor steam generator, and reduce the short-range operation time of operators in the radiation environment? (3) How to solve the problem of equipment passability, so that the whole set of equipment can pass through the narrow transportation space smoothly? The above problems are the key to restricting laser welding technology from being used in high temperature gas-cooled reactor nuclear power plant steam generator feedwater pipe plugging operations

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