Is OD peening of Alloy 800 SG tubes desirable?
Conference
·
OSTI ID:48126
- Laborelec, Linkebeek (Belgium)
- Tractebel, Bruxelles (Belgium)
The shot peening of the outer surface of Alloy 800 is proposed by the steam generator supplier in order to increase the stress corrosion cracking resistance of the tubes. The benefits and drawbacks of such a treatment are evaluated, focusing on the main concern i.e. a possible enhanced tendency of stress corrosion cracking at the transition of the expanded tube-to-tubesheet joint. Stress corrosion tests as well as residual stresses measurements demonstrate no significant difference between peened and unpeened tubes at that location. The other concerns such as stability of the compressive stresses, increased risk of pitting or intergranular attack and pollution of the secondary circuit by fragmented beads appear the as minor concerns.
- OSTI ID:
- 48126
- Report Number(s):
- CONF-910808--
- Country of Publication:
- United States
- Language:
- English
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· J. Mater. Energy Syst.; (United States)
·
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·
OSTI ID:7079016
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OSTI ID:6129549