Full Content is available to subscribers

Subscribe/Learn More  >

Reliability of Water Jet Peening as Residual Stress Improvement Method for Alloy 600 PWSCC Mitigation

[+] Author Affiliations
Koji Okimura, Takao Konno, Marekazu Narita

Mitsubishi Heavy Industries, Ltd., Kobe, Japan

Takahiro Ohta, Masahiko Toyoda

Mitsubishi Heavy Industries, Ltd., Takasago, Japan

Paper No. ICONE16-48375, pp. 565-570; 6 pages
  • 16th International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance, Installations and Life Cycle; Component Reliability and Materials Issues; Advanced Applications of Nuclear Technology; Codes, Standards, Licensing and Regulatory Issues
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4814-0 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME


As a countermeasure against high residual stress, we have developed some residual stress improvement methods, as Water Jet Peening (WJP) [1] [2] for components installed in water, Shot Peening by Ultrasonic-wave vibration (USP) for components installed in air, and outer surface irradiated Laser Stress Improvement Process (L-SIP) [3] for components being able to approach from outer surface only. WJP is applied to Reactor Vessel (RV) outlet/inlet nozzle safe-end joints (Alloy600 weld metal), RV Bottom Mounted Instrument (BMI) inner surface and J-weld. Especially, it is difficult to apply BMI because BMI inner surface is very narrow space (inner diameter; approximately 10–15mm) and BMI J-weld is complicated 3-dimensional form. On the occasion of actual application, we carry out the verification tests and check that a stress improvement was effective as one of PWSCC mitigation. And the compressive stress induced by WJP is verified to continue to exist under actual plant operation conditions. Thus, in addition to replacing the material with Alloy 690, converting the residual stress to the compressive can prevent the occurrence of PWSCC.

Copyright © 2008 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In