Abstract
Based upon linear elastic fracture mechanics approach, a damage tolerance design philosophy for light water reactor pressure vessel and piping components where the presence of a significant crack is acceptable, was reviewed with special reference to stress corrosion cracking and corrosion fatigue subcritical crack growth.
The published data of failure analysis were discussed from a viewpoint of fracture mechanics evaluation. Here, weld toe cracking in crude oil pipe-lines in Canada, and corrosion-pit initiated cracking in low pressure turbine discs at Hinckley Point ‘A’ and turbine shafts at Ferrybridge power stations in England were compared and discussed. Hence three parameters such as mechanical, metallurgical and environmental factors are taken into consideration.
