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Method and system for damage repair of tube plate and caulk weld of steam generator of nuclear power station

A steam generator, damage repair technology, applied in welding equipment, applications, heat exchange equipment, etc., can solve the problem of inability to completely eliminate the impact of foreign body damage, and achieve the effect of eliminating the risk of hardened layer and stress corrosion

Active Publication Date: 2016-01-13
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that the existing SG on-site repair technology cannot completely eliminate the influence of foreign matter damage on SG equipment, the invention provides a method and system for repairing damage to the tube plate and sealing weld of a nuclear power plant steam generator, which can ensure the repaired sealing The weld size meets the requirements and the risk of hardening and stress corrosion corrosion can be eliminated

Method used

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  • Method and system for damage repair of tube plate and caulk weld of steam generator of nuclear power station
  • Method and system for damage repair of tube plate and caulk weld of steam generator of nuclear power station
  • Method and system for damage repair of tube plate and caulk weld of steam generator of nuclear power station

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Embodiment 1

[0071] Please refer to image 3 , the embodiment of the present invention provides a method for repairing damage to the tube sheet and sealing weld of a steam generator in a nuclear power plant. Formed from the tube sheet and the sealing weld, the repair method includes the steps of:

[0072] S1. Carrying out foreign object damage inspection on the tube sheet and the sealing weld to obtain damage inspection data;

[0073] S2. Calculating and processing the damage inspection data to obtain damage calculation and processing data of the tube sheet and the sealing weld;

[0074] S3. Perform damage repair on the tube sheet and the sealing weld based on the damage calculation and processing data;

[0075] S4. After the damage repair is completed, perform a repair inspection on the tube sheet and the sealing weld to ensure that the repaired tube sheet and the sealing weld meet the equipment specification requirements.

[0076] It can be seen that the above step S1 is a damage insp...

Embodiment 2

[0094] Based on the same inventive concept, please refer to Figure 5A , the embodiment of the present invention also provides a nuclear power plant steam generator tube plate and sealing weld damage repair system, the sealing weld is fixedly connected to the tube plate and heat transfer tube of the steam generator, and the damage is caused by the impact of foreign matter The tube sheet and the sealing weld are formed, and the repair system includes:

[0095] A damage inspection module 51, configured to perform foreign object damage inspection on the tube sheet and the sealing weld to obtain damage inspection data;

[0096] A damage calculation and processing module 52, configured to perform calculation and processing on the damage inspection data, so as to obtain damage calculation and processing data of the tube sheet and the sealing weld;

[0097] A damage repair module 53, configured to perform damage repair on the tube sheet and the sealing weld based on the damage calcu...

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Abstract

The invention discloses a method and a system for damage repair of a tube plate and a caulk weld of a steam generator of a nuclear power station, and solves the technical problem that a conventional SG site repair technology cannot completely eliminate the influence of foreign object damage on SG. The method comprises the following steps: S1, conducting foreign object damage inspection on the tube plate and the caulk weld to obtain damage inspection data; S2, calculating the damage inspection data to obtain damage calculation data of the tube plate and the caulk weld; S3, conducting damage repair on the tube plate and the caulk weld based on the damage calculation data; and S4, after damage repair is finished, conducting repair inspection on the tube plate and the caulk weld to ensure that the repaired tube plate and the repaired caulk weld meet the equipment code requirement. Through the adoption of the method and the system, that the size of the repaired caulk weld meets the requirement is ensured, and a hardened layer and a stress corrosion risk can be eliminated.

Description

technical field [0001] The invention relates to the technical field of repairing damage to steam generator tube sheets and sealing welds (flat structure) caused by foreign matter in the primary circuit environment of a pressurized water reactor nuclear power plant, and in particular to a method for repairing damage to steam generator tube sheets and sealing welds of a nuclear power plant and system. Background technique [0002] The main equipment of the primary circuit of the pressurized water reactor nuclear power plant includes the reactor pressure vessel, the main pipeline, the steam generator (SG, SteamGenerator), the main pump, the voltage stabilizer, etc., such as figure 1 As shown, the SG is separated by the tube plate 1 into a primary side 21 and a secondary side 22, and the primary side 21 is separated into a primary side hot water chamber 211 and a primary side cold water chamber 212 by a water chamber separator 20. U-shaped heat transfer tubes 3 are arranged in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K31/12B23K101/14
CPCB23K31/02B23K31/125B23K2101/14
Inventor 黄腾飞邱振生杨春乐刘飞华邱桂辉毋争娟
Owner 中广核工程有限公司
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