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ASTM Selected Technical Papers
Environmentally Assisted Cracking: Predictive Methods for Risk Assessment and Evaluation of Materials, Equipment, and Structures
By
RD Kane
RD Kane
1
InterCorr International, Inc.
?
14503 Bammell N. Houston Road
Suite 300
Houston Texas 77014
Email:rdk @ intercorr.com
Symposium Chairman and Editor
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ISBN-10:
0-8031-2874-6
ISBN:
978-0-8031-2874-3
No. of Pages:
503
Publisher:
ASTM International
Publication date:
2000

Irradiation-assisted stress corrosion cracking (IASCC) has been observed in various highly irradiated, stainless steel core components of both Boiling Water and Pressurized Water nuclear reactors. This phenomenon is believed to be responsible for cracking detected by ultrasonic nondestructive examination of some Type 316L stainless steel baffle/former bolts in six first generation CP0 series PWRs operating in France. Similar bolt failures in PWR core structures have been confirmed more recently in other countries. This paper describes a statistical analysis of the French observations. The objective was to determine whether any of the known fabrication and operating characteristics of the baffle/former bolts could be identified as having an important influence on the extent of bolt cracking. This information has been used to aid decisions concerning inspection frequency, possible replacement of cracked bolts, and selection of more resistant materials.

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,”
Eurocorr '99
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,
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