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Method for producing vibration-resistant bar assembly of AP1000 nuclear power generating set steam generator

A technology for steam generators and nuclear power units, which is applied in the field of preparation of anti-vibration strip components, can solve the problems of manpower, financial resources and event waste, increase the risk of maintenance personnel being exposed to radioactive radiation, etc., to increase rolling speed and improve processing Process performance, the effect of improving processing performance

Active Publication Date: 2012-11-07
丹阳市龙鑫合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the heat transfer tube is damaged by vibration, the steam generator has to be replaced, which will inevitably cause a huge waste of manpower, financial resources and incidents, and also increase the risk of radioactive radiation for maintenance personnel

Method used

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  • Method for producing vibration-resistant bar assembly of AP1000 nuclear power generating set steam generator
  • Method for producing vibration-resistant bar assembly of AP1000 nuclear power generating set steam generator
  • Method for producing vibration-resistant bar assembly of AP1000 nuclear power generating set steam generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] like figure 1 , the preparation method of the anti-vibration bar assembly of the steam generator of the AP1000 unit of this embodiment includes: preparation of the anti-vibration bar, preparation of the end cap, bending of the anti-vibration bar, end cap assembly, upsetting , inspection, cleaning and packaging processes.

[0056] The anti-vibration bar is bent and formed: the anti-vibration bar is cut according to the total length of the required size plus 50mm allowance, the angle is set to bend the anti-vibration bar, and the bent anti-vibration bar is placed on a surface grinder Above, grind the thickened area of ​​the corner to meet the requirements of the drawing.

[0057] The end cap assembly: use alcohol to gently scrub the surface of the end cap and the inner hole formed by wire cutting for the end cap produced according to the end cap production method, and clean the stainless steel bar with alcohol at the same time. After cleaning, remove the burrs , bite m...

Embodiment 2

[0062] The preparation method of the anti-vibration bar in the above-mentioned embodiment 1 includes the following steps in sequence: induction furnace smelting, smelting analysis, forging, hot rolling, first heat treatment, performance test (tensile, hardness) and metallographic inspection, product Analysis, cold drawing, second heat treatment, cold working, property testing (tensile, hardness) and grain size inspection, dimensional inspection, marking, cleaning, reporting.

[0063] a. Induction furnace smelting: when alloy materials are smelted, nickel plates, pure iron, and metal chromium are placed at the bottom of the induction furnace to be densely packed. After melting 70%, 2% of the total slag is added for steelmaking, and the temperature of molten steel is measured. After reaching the tapping temperature, pour the molten steel into the ladle, calm down for 1-2 minutes, and pour it into steel ingots and bars. The weight of each ingot is 40-50kg, and the diameter of the s...

Embodiment 3

[0102] The preparation method of the end cap in the above-mentioned embodiment 1 includes the following steps in sequence: intermediate frequency induction furnace smelting, electroslag refining, smelting analysis, forging, ultrasonic inspection, hot rolling, heat treatment, performance test, product analysis, end cap car processing, size Inspect, mark, clean.

[0103] a. Induction furnace smelting: when alloy materials are smelted, nickel plates, pure iron, and metal chromium are placed at the bottom of the induction furnace to be densely packed. After melting 70%, 2% of the total slag is added for steelmaking, and the temperature of molten steel is measured. After reaching the tapping temperature, pour the molten steel into the ladle, calm down for 1-2 minutes, and pour it into steel ingots and bars. The weight of each ingot is 40-50kg.

[0104] b. Electroslag refining: After the alloy material is smelted, electroslag refining is required to effectively improve the purity an...

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Abstract

Disclosed is a method for producing a vibration-resistant bar assembly of an AP1000 nuclear power generating set steam generator. The method comprises processes of production of vibration-resistant bars, production of end caps, bending molding, assembly of end caps, heading, detection, cleaning and packaging. The vibration-resistant bar assembly of the AP1000 nuclear power generating set steam generator has a simple structure, the quality of the vibration-resistant bar assembly meets accurate requirements of steam generators in a nuclear power plant for vibration-resistant bars and the vibration-resistant bar assembly is safe during usage. According to the method for producing the vibration-resistant bars, the production processes are strict, the technical requirements for the vibration-resistant bar assembly of the steam generator in the nuclear power plant are guaranteed, the quality is guaranteed and the safety is improved.

Description

technical field [0001] The invention relates to a preparation method of an anti-vibration bar assembly of a steam generator of an AP1000 nuclear power unit. Background technique [0002] The U-shaped heat transfer tube in a nuclear power plant is the most critical and weakest link in the pressure boundary of the primary circuit system. Once the heat transfer tube is damaged by vibration, the steam generator must be replaced, which will inevitably cause a huge waste of manpower, financial resources and incidents, and also increase the risk of radioactive radiation for maintenance personnel. Therefore, solving the steam generator tube failure accident is a key issue related to the safety of the nuclear power plant and to make the nuclear power plant competitive and viable. [0003] In order to eliminate the source of vibration as much as possible, it is generally necessary to install anti-vibration strips at the elbow of the U-shaped heat transfer tube in the steam generator....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 王国年姜建东束志华张勋
Owner 丹阳市龙鑫合金有限公司
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