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Anti-vibration strip component of steam generator of AP1000 nuclear power unit

A technology for steam generators and nuclear power units, which is applied in nuclear power plants, nuclear power generation, detailed information of nuclear power plants, etc., can solve the problems of increasing the danger of maintenance personnel being exposed to radioactive radiation, waste of manpower, financial resources and incidents, and improve the processing technology. performance, automation, cost reduction

Active Publication Date: 2012-11-28
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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  • Anti-vibration strip component of steam generator of AP1000 nuclear power unit
  • Anti-vibration strip component of steam generator of AP1000 nuclear power unit
  • Anti-vibration strip component of steam generator of AP1000 nuclear power unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 , the anti-vibration bar assembly of the AP1000 unit steam generator in this embodiment, which includes: an anti-vibration bar 1 with a V-shaped structure and two end caps 2 fixedly sleeved on both ends of the anti-vibration bar.

[0059] 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).

[0060] 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.

[0061] The preparation method of the above-mentioned anti-vibration bar assembly includes: preparation of anti-vibration bar bar, preparation of end cap, bending and forming of anti-vibration bar bar, end cap assembly, upsetting, inspection, cleaning and packaging.

[0062] The anti-vibration bar is bent and formed: the anti-vibrat...

Embodiment 2

[0068]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.

[0069] 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

[0109] 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.

[0110] 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.

[0111] 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 discloses an anti-vibration strip component of a steam generator of an AP1000 nuclear power unit. The anti-vibration strip component comprises a V-shaped anti-vibration strip and two end caps respectively arranged on both ends of the anti-vibration strip, wherein the anti-vibration strip is made of a 405 stainless steel material, and the end caps are made from a 609 nickel-based alloy material. A preparation method for preparing the anti-vibration strip component comprises the following steps of: preparing the anti-vibration strip, preparing the end caps, bending, assembly the end caps, heading, checking, cleaning and packaging. According to the anti-vibration strip component of the steam generator of the AP1000 nuclear power unit provided by the invention, the structure is simple, the product quality conforms to precision requirements of the steam generator in a nuclear power plant about the anti-vibration strip, and the anti-vibration strip component is safer to use. According to the preparation method of the anti-vibration strip, through strict preparation steps, the technique requirements about the anti-vibration strip component of the steam generator in the nuclear power plant are ensured, the quality is ensured, and safety is improved.

Description

technical field [0001] The invention relates to 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. How to provide an anti-...

Claims

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Application Information

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IPC IPC(8): B23P15/00G21D1/00
CPCY02E30/40B23P15/00G21D1/00Y02E30/30
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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