[en] A fracture mechanics model is presented for analysis of iodine induced stress corrosion crack growth in Zircaloy tubing. The model utilizes a power law to relate crack velocity to stress intensity factor, a hyperbolic tangent function for the influence of iodine concentration, and an exponential function for the influence of temperature and material strength. Comparisons of predicted to measured failure times show that predicted failure times are within a factor of two of the measured failure times for a majority of the specimens considered