Shockproof strip assembly for steam generator of nuclear power unit

A technology for steam generators and nuclear power units, which is applied in the components of steam boilers, steam generation, steam boiler accessories, etc., can solve the problems of increasing the danger of maintenance personnel being exposed to radioactive radiation, waste of manpower, financial resources and incidents, etc. The effect of improving processing performance, realizing automation, and increasing rolling speed

Active Publication Date: 2013-02-13
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 w

Method used

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  • Shockproof strip assembly for steam generator of nuclear power unit
  • Shockproof strip assembly for steam generator of nuclear power unit
  • Shockproof strip assembly for steam generator of nuclear power unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 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.

[0062] 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).

[0063] The center of the end cap 2 and four places near the two ends of the end cap on the anti-vibration bar 1 are crushed. The two flattened places at the ends of the end caps on the anti-vibration strip 1 are distributed symmetrically.

[0064] The preparation method of the above-mentioned anti-vibration bar assembly includes: preparation of anti-...

Embodiment 2

[0071] 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.

[0072] 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

[0119] 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.

[0120] 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.

[0121] 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 a shockproof strip assembly for a steam generator of a CAP1400 unit. The shockproof strip assembly comprises a shockproof strip of a V-shaped structure and two end caps which are respectively arranged at the two ends of the shockproof strip, wherein the shockproof strip is made from 405 stainless steel material, and the end caps are made from 690 nickel-based alloy material. A method for preparing the shockproof strip assembly comprising the processes of preparation of the shockproof strip, preparation of the end caps, bending and moulding, assembling the end caps, upsetting, inspection, cleaning and packaging. The shockproof strip assembly for the steam generator of the CAP1400 unit provided by the invention is simple in structure, quality of the shockproof strip assembly meets precision requirement of the steam generator in a power nuclear unit on the shockproof strip, and the shockproof strip assembly is safe when being used. The preparation method of the shockproof strip provided by the invention is strict in processes, technological requirements on the shockproof strip assembly for the steam generator in the power nuclear unit are guaranteed, quality is guaranteed, and safety is improved.

Description

technical field [0001] The invention relates to an anti-vibration bar assembly 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 plant competit...

Claims

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Application Information

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IPC IPC(8): F22B37/00B23P15/00
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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