The Pre-service Inspection of AP1000 Steam Generator Tubes

doi:10.11930/j.issn.10.11930.2015.10.6

Abstract

Abstract: In order to verify the quality of AP1000 steam generator tubes in a nuclear power plant, following the national nuclear safety regulation, ASME Standards Volume XI and Westinghouse design specifications, the pre-service inspection(PSI) should be conducted by adopting eddy current inspection after the hydraulic pressure testing and before loading for the total steam generator tubes. In this paper, the eddy current inspection system, implementation, inspecting technology and inspection results are presented. The inspection reveals that the“DNT” signal is seen in 24 tubes and the“BLG” signal is seen in 23 tubes in the two steam generators, all of which meet the acceptance criteria, and no recordable signals are seen in other tubes. In addition, the comparison between the PSI results and the completion report is carried out, which shows that they are in total consistency.

Key words: AP1000, nuclear power unit, steam generator, heat transfer tube, pre-service inspection, eddy current inspection

CLC Number:

WANG Hao, SHI Yongjun, GAO Jun, MIAO Yusheng, DING Hongfeng, YU Yi. The Pre-service Inspection of AP1000 Steam Generator Tubes[J]. journal1, 2015, 48(10): 6-11.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.10.6

https://www.electricpower.com.cn/EN/Y2015/V48/I10/6

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