Steam generator tube denting. Field study

This project attempted to utilize the large amount of steam generator field experience by correlating tube denting failures to water chemistry operation and steam generator design parameters. The data base consisted of detailed water chemistry by fuel cycle, detailed steam generator design and operational parameters, and tube failure data from numerous domestic and foreign operating plants. Data were collected for past operating histories from the start of all volatile water treatment through 1983. The field data were contrasted with laboratory results and were subjected to statistical analysis utilizing clustering algorithms, discrimination techniques, factor analysis and regression analysis. The view that chloride is a major contributor to denting in steam generators was supported by the data but other correlations were not found. Several deficiencies in the collected data base may have obscured correlation with existing tube denting theories. 51 figs., 16 tabs