Stainless steel plate welding method for radiation environment

Abstract

The invention relates to the field of in-service maintenance of nuclear power plants, specifically relates to a welding method for repairing equipment and components in high-radiation areas of a nuclear power plant, and aims at ensuring the personal safety of repairing workers as well as reducing the repairing cost of the nuclear power plant. The stainless steel plate welding method for the radiation environment is applicable to stainless steel plates being 2-5mm in thickness. The method comprises the following steps: pairing and abutting two stainless steel plates, and forming abutting joints being 100+ / -10mm in width; fixing the abutting joints by spot welding; mounting an automatic welding machine for TIG automatic welding in the extending direction of the abutting joints; examining welded fillet welds after the automatic welding machine finishes the welding; and repairing welding gaps in the fillet welds in a manual welding manner. The method is applicable to welding and repairing of the equipment and components in the high-radiation areas of the nuclear power plant, and the injury of radiation on the bodies of the repairing workers can be reduced; the method is fast to weld, small in time consumption, and low in labor cost.

Description

technical field [0001] The invention relates to the field of in-service maintenance of nuclear power plants, in particular to a welding method used for maintenance of equipment and components in high-radiation areas of nuclear power plants. Background technique [0002] During the operation of the nuclear power plant, it is necessary to carry out regular maintenance on the nuclear power plant. During the maintenance process, it is often necessary to carry out welding maintenance on some equipment and components located in high radiation areas. [0003] At present, manual welding is usually used for welding maintenance of equipment and components in nuclear power plants, especially those located in high-radiation areas. In order to reduce the damage caused by radiation to the body of maintenance personnel, maintenance personnel must enter the high-radiation area to carry out welding maintenance work after the nuclear power plant stops operating. However, even after the stop...

AI Technical Summary

Problems solved by technology

However, even after the stop of operation, there is still radiation in the nuclear power plant, especially in the high-radiation area, and the equipment and components in the nuclear power plant are large in size, the length of the weld is usually long, and the welding workload is large. The time for welding maintenance in the radiation area is long, and the absorbed radiation dose is large, which will still cause great damage to the body of the maintenance personnel

In addition, the long welding maintenance time leads to a long shutdown of the nuclear power plant, which in turn causes great economic losses to the operation of the nuclear power plant

Images