Quantitative Prediction of Environmentally Assisted Cracking in Boiling Water Reactors

概要

論文の詳細を見る
Environmentally-assisted cracking has presented a significant structural integrity problem in various industries including marine, petrochemical, aerospace and power generation. This may be attributed to various factors, including inadequate data bases for engineering-based design criteria, and the complex interactions between the relevant material, stress and environmental conditions, which make it difficult to develop effective life prediction strategies. This situation is offset by the increase in quantitative understanding of the mechanisms of cracking over the last 20 years. This paper reviews the role that such developments have had in mitigating the problem of stress corrosion and corrosion fatigue of ductile structural alloys in boiling water reactors (BWRs). These reactors have experienced cracking problems in austenitic and ferritic alloys in, for instance, piping, pressure vessels and in irradiated core internals. Emphasis in this paper will be placed on describing, (a) the development and qualification of a mechanistically-based prediction methodology for the relevant degradation mode and,(b) the use of such a qualified methodology for proactive, cost-effective, life-management decisions.
一般社団法人日本機械学会の論文
2001-10-20