Scientific American: The U.S.'s nuclear reactor fleet dipped below 100 for the first time in decades, when, at the tail end of 2014, Vermont Yankee shuttered its operations. The 604-megawatt power plant's termination did not come as a surprise: it had logged a slew of safety issues in recent years, including burst pipes, leaks and misplaced fuel rods. Nevertheless, it provided up to 4 percent of New England's power and one third of Vermont's. Its owner, Entergy, just did not have enough money to make the necessary upgrades,...