Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit

A technology for steam generators and nuclear power units, applied to the primary side of steam generators, nuclear power generation, nuclear power plants, etc., can solve the problems of increasing the risk of maintenance personnel being exposed to radioactive radiation, waste of manpower, financial resources and events, etc., and achieve improvement Process performance, automation, and cost reduction effects

Inactive Publication Date: 2014-05-21
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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  • Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit
  • Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit
  • Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Such as figure 1 , the anti-vibration bar assembly of the steam generator of the CAP1000 unit of the present embodiment, which includes: an anti-vibration bar 1 with a V-shaped structure and two end caps 2 fixedly sleeved at both ends of the anti-vibration bar. The end of the anti-vibration strip and the end cap are provided with pin holes, the anti-vibration strip and the end cap are assembled through pins, and the pin and the end cap are fixed by electric welding.

[0062] The anti-vibration strip assembly includes four anti-vibration strips 1 aligned and arranged in parallel, each end cap 2 on the same side is fixed with a retaining ring 3 by electric welding, and the part of each anti-vibration strip 1 adjacent to the corresponding end cap 2 passes through the retaining strip 4 It is welded and fixed with the retaining ring 3.

[0063] The anti-vibration bar 1 is made of 06Cr13 stainless steel; the end cap 2 is made of NS3105 nickel-based alloy.

[0064] The prep...

Embodiment 2

[0070]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.

[0071] 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 40...

Embodiment 3

[0118] 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.

[0119] 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.

[0120] The electroslag refining: After the alloy material is smelted, electroslag refining is required to effectively improve the purity and ...

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Abstract

The invention relates to an anti-vibration bar assembly of a steam generator of a CAP1000 nuclear power unit. The anti-vibration bar assembly of the steam generator of the CAP1000 nuclear power unit comprises V-shaped anti-vibration bars and end caps which are respectively arranged at the two ends of the anti-vibration bars, pin holes are formed in the end parts and the end caps of the anti-vibration bars, the anti-vibration bars and the end caps are assembled through pins and the pins and the end caps are fixed through electric welding. The anti-vibration bar assembly comprises four anti-vibration bars which are aligned and arranged in parallel, the end caps on the same side are fixedly connected with a retaining ring, and the parts of the anti-vibration bars adjacent to the corresponding end caps are fixedly connected with the retaining ring by the retaining bar. The invention additionally relates to a preparation method for the anti-vibration bar assembly. The preparation method comprises the steps of anti-vibration bar preparation, end cap preparation, bending, end cap assembling, assembly assembling, check, cleaning and packaging. The anti-vibration bar assembly of the steam generator of the CAP1000 nuclear power unit provided by the invention has the advantages that the structure is simple, the product quality meets the requirement on the precision of the anti-vibration bar of the steam generator in a nuclear power station and the anti-vibration bar is safer to use. The preparation method for the anti-vibration bar has strict preparation steps.

Description

technical field [0001] The invention relates to a preparation method of an anti-vibration bar assembly of a steam generator of a CAP1000 nuclear power unit. Background technique [0002] CAP1000 nuclear power technology, CAP1000 is a passive pressurized water reactor nuclear power technology. The nuclear fuel made of uranium is fissioned in the "reactor" equipment to generate a lot of heat energy, and then the heat energy is taken out by water under high pressure. Steam is generated in the steam generator, and the steam drives the steam turbine to rotate with the generator, and electricity is continuously generated. The biggest feature of CAP1000 is that it is simple in design, easy to operate, and makes full use of many "passive safety systems". The safety of nuclear power plants is improved, and at the same time, the cost of nuclear power unit construction and long-term operation can be significantly reduced. [0003] The U-shaped heat transfer tube in a nuclear power pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00G21D1/00
CPCB23P15/26G21D1/006Y02E30/00
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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