[en] This case study shows that the diffusion of nuclear power in the electric public utility industry in Canada approximates the logistic growth curve, in agreement with previous results on technological innovation diffusion in the U.S. private sector. Many of the economic variables that affect this diffusion in the private sectors in the U.S. and Canada are also significant in the public sector in Canada. Too few utilities have adopted nuclear technology to permit using regression analysis to study the effect of environmental and regulatory factors on the growth of Ontario Hydro. Thus, cost-benefit analysis for each province might be more effective