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Method for manufacturing shake-proof strip of steam generator of nuclear power unit

A technology for steam generators and nuclear power units, which is applied to the primary side of steam generators, etc., can solve the problems of increasing the danger of radioactive irradiation of maintenance personnel, waste of manpower, financial resources and incidents, so as to improve the performance of processing technology and realize automation. , the effect of reducing costs

Active Publication Date: 2014-03-26
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 manufacturing shake-proof strip of steam generator of nuclear power unit
  • Method for manufacturing shake-proof strip of steam generator of nuclear power unit
  • Method for manufacturing shake-proof strip of steam generator of nuclear power unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Such as figure 1 , the anti-vibration strip assembly of the steam generator of the CAP1400 unit of the present embodiment, which includes: the anti-vibration strip 1 of the V-shaped structure and two end caps 2 fixedly sleeved at the two ends of the anti-vibration strip; the section of the anti-vibration strip It is rectangular, and the cross-section of the end cap is back-shaped, so as to facilitate the fixing of the anti-vibration bar and the end cap through upsetting.

[0063] The anti-vibration bar 1 is made of 405 stainless steel (SA-479 TYPE405); the end cap 2 is made of 690 nickel-based alloy (SB-166 UNS N06690).

[0064] The center of the end cap 2 and four places on the anti-vibration bar 1 adjacent to the two ends of the end cap are crushed. The two flattened places at the ends of the end caps on the anti-vibration strip 1 are distributed symmetrically.

[0065] The preparation method of the above-mentioned anti-vibration bar assembly includes: preparation o...

Embodiment 2

[0072] 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, finished product processing, performance testing (tensile, hardness) and grain size inspection, dimensional inspection, marking, cleaning.

[0073] The induction furnace smelting: when the alloy material is smelted, a nickel plate, pure iron, and metal chromium are placed at the bottom of the induction furnace, and they are mixed and packed densely. After melting 70%, 2% of the total weight of the slag is added to carry out steelmaking. After the molten steel temperature reaches 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 4...

Embodiment 3

[0114] The preparation method of the end cap in the above-mentioned embodiment 1 includes the following steps in sequence: 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.

[0115] The induction furnace smelting: when the alloy material is smelted, a nickel plate, pure iron, and metal chromium are placed at the bottom of the induction furnace, and they are mixed and compacted. After melting 70%, 2% of the total slag is added for steelmaking, and the measured After the temperature of the molten steel reaches 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.

[0116] The electroslag refining: After the alloy material is smelted, electroslag refining is required to effectively improve the purity and ...

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Abstract

Provided is a method for manufacturing a shake-proof strip of a CAP 1400 unit steam generator. The shake-proof strip comprises a shake-proof strip of a V-shaped structure and two end caps arranged at two ends of the shake-proof strip. The shake-proof strip is made of a 405 stainless steel material, and the end caps are made of a 690 nickel base alloy material. The method for manufacturing a shake-proof strip assembly includes procedures of manufacturing of the shake-proof strip, manufacturing of the end caps, bending forming, end cap assembling, rammer pressing, checking, cleaning and packaging. The shake-proof strip assembly is simple in structure, product quality meets precise requirements of the steam generator in a nuclear power station on the shake-proof strip, and use is safe. The manufacturing method of the shake-proof strip is subjected to strict manufacturing procedures, meets process requirements for the shake-proof strip assembly of the steam generator in the nuclear power station, guarantees quality and improves the safety performance.

Description

technical field [0001] The invention relates to a method for preparing an anti-vibration bar of a steam generator of a CAP1400 nuclear power unit. Background technique [0002] CAP1400 is the code name of the major special demonstration project of pressurized water reactor, which refers to the advanced passive nuclear power technology with an installed capacity of more than 1.4 million kilowatts in my country. [0003] 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 ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/26G21D1/006
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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