Effect of shot peening on primary water stress corrosion cracking of Alloy 600 steam generator tubes in an operating PWR plant
✍ Scribed by Do Haeng Hur; Myung Sik Choi; Deok Hyun Lee; Myung Ho Song; Seon Jin Kim; Jung Ho Han
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 203 KB
- Volume
- 227
- Category
- Article
- ISSN
- 0029-5493
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✦ Synopsis
The effect of shot peening on the primary stress corrosion cracking behavior of thermally treated Alloy 600 steam generator tubes in an operating pressurized water reactor (PWR) plant was analyzed based on pulled tube examinations and in-service inspection eddy current test (ISI-ECT) data. The evaluation was focused on the shape of crack, evolution of the number of new cracks and cracked tube fraction, and variation of crack length and the corresponding eddy current amplitude before and after shot peening. The shape of the crack was changed from a half-elliptical type before shot peening, to an elliptical one with bulging after peening. It was concluded that the shot peening was not effective for retarding both crack initiation and growth for this plant.