Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants

Yoshikazu Ohara; Yohei Shintaku; Satoshi Horinouchi; Kazushi Yamanak

doi:10.1063/1.4749327

Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants

Yoshikazu Ohara, Yohei Shintaku, Satoshi Horinouchi, Kazushi Yamanak

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Closed stress corrosion cracks (SCCs) have been generated in nuclear power plants, resulting in the underestimationand nondetection. To solve this problem, we have developed closed-crack imaging method, the subharmonic phased array forcrack evaluation (SPACE), on the basis of subharmonic waves and phased array technique. Here, after verifying the SPACE in a realistic SCC specimen, we present a two-step method for forming deep closed SCC for a reasonable amount of time. The SCC closure was verified by SPACE. This significantly contributes to the improvement of nondestructive evaluation methods and training/educating of inspection engineers.

Original language	English
Title of host publication	Nonlinear Acoustics
Subtitle of host publication	State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics
Pages	183-186
Number of pages	4
Edition	1
DOIs	https://doi.org/10.1063/1.4749327
Publication status	Published - 2012 May

Publication series

Name	AIP Conference Proceedings
Number	1
Volume	1474
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Keywords

Closed stress corrosion cracks
Imaging
Phased array.
Subharmonic waves

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4749327

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Ohara, Y., Shintaku, Y., Horinouchi, S., & Yamanak, K. (2012). Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. In Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics (1 ed., pp. 183-186). (AIP Conference Proceedings; Vol. 1474, No. 1). https://doi.org/10.1063/1.4749327

Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. / Ohara, Yoshikazu; Shintaku, Yohei; Horinouchi, Satoshi; Yamanak, Kazushi.

Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics. 1. ed. 2012. p. 183-186 (AIP Conference Proceedings; Vol. 1474, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ohara, Y, Shintaku, Y, Horinouchi, S & Yamanak, K 2012, Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. in Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics. 1 edn, AIP Conference Proceedings, no. 1, vol. 1474, pp. 183-186. https://doi.org/10.1063/1.4749327

Ohara Y, Shintaku Y, Horinouchi S, Yamanak K. Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. In Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics. 1 ed. 2012. p. 183-186. (AIP Conference Proceedings; 1). https://doi.org/10.1063/1.4749327

Ohara, Yoshikazu ; Shintaku, Yohei ; Horinouchi, Satoshi ; Yamanak, Kazushi. / Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics. 1. ed. 2012. pp. 183-186 (AIP Conference Proceedings; 1).

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Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants

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