A Sampling Method for Inspection of Water Chamber Head Forgings of Reactor Steam Generator

Abstract

The invention relates to a sampling method for quality inspection of a water chamber seal head forging of a reactor steam generator. By performing composition analysis and hardness test on the water chamber seal head forging and conducting mechanical performance test and metallographic structure examination on an acquired sample, the overall quality of the water chamber seal head forging of the reactor steam generator can be inspected comprehensively, and complete assessment can be carried out on the manufacturing process of the water chamber seal head forging. The method is consistent with the process assessment requirement of nuclear power norm RCC-M, complete destruction of the water chamber seal head forging is not needed, and the water chamber seal head forging can be used as a product continuously after sampling, thereby maximumly reducing the sampling cost.

Description

technical field [0001] The invention relates to a sampling method for quality inspection of a water chamber head of a reactor steam generator. Background technique [0002] At present, the world has entered a new round of nuclear power development. Many countries are actively preparing to build new nuclear power units. However, the production capacity of large-scale castings and forgings in nuclear islands around the world is very limited, and the manufacturing technology is mainly controlled in a few. In the manufacturing plant, this can no longer meet the needs of the development of nuclear power all over the world. Combined with our country's policy of developing nuclear power and the localization of nuclear power equipment, to achieve the goal of my country's nuclear power development plan, it is necessary to realize the localization of the forgings of the water chamber head of the reactor steam generator. In order to truly realize the localization of the water chamber ...

AI Technical Summary

Problems solved by technology

Forging, punching and flanging must be heated three times, and there are two more times in the middle that need to be cooled to room temperature before machining, so the internal quality of forgings is not easy to guarantee;

[0015]The heat treatment process is easy to produce deformation, the thickness of the forging is large, and it is not easy to harden;

[0016]The overall quality of forgings is not easy to check, and it is difficult to take samples from non-standard sampling parts;

[0017] is a special-shaped part, and it is difficult to perform machining and non-destructive testing

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