That's a news story from Canada. Nuclear building costs vary widely from country to country, depending on the type of plant, the local infrastructure, and how psychotic the political and regulatory system is. In contrast, South Korea is steadily building nuclear plants for a fraction of the number quoted in that news story, and China is building them even cheaper. Without any sudden cost surprises, I might add.
Contrasting the two, I have to wonder: what's Canada's problem?