Crept pressure tube model for heat transport system aging analysis

As part of an overall program to quantitatively examine the integrated effects of Heat Transport System (HTS) aging, Bruce Power and Ontario Power Generation (OPG) have collaborated on the development of a crept pressure tube model. This paper presents the model for the prototype station; Bruce B. Available pressure tube inspection data for Bruce B has been used to develop the model. Ten potential forms of correlations were examined. Multiple linear regression on the inspection data was used to determine the coefficients for the correlations. The recommended model is capable of predicting the current and future axial profile of crept pressure tubes. (author)