WASHINGTON -- Two years after the nuclear crisis in Japan, the top U.S. regulator says American nuclear power plants are safer than ever, though not trouble-free. A watchdog group calls that assessment overly rosy.
"The performance is quite good," Nuclear Regulatory Commission chairman Allison Macfarlane said in an interview with The Associated Press.
All but five of the nation's 104 nuclear reactors were performing at acceptable safety levels at the end of 2012, Macfarlane said, citing a recent NRC report. "You can't engage that many reactors and not have a few that are going to have difficulty," she said.
But the Union of Concerned Scientists has issued a scathing report saying nearly one in six U.S. nuclear reactors experienced safety breaches last year, due in part to weak oversight. The group accused the NRC of "tolerating the intolerable."
Using the agency's own data, the scientists group said 14 serious incidents, ranging from broken or impaired safety equipment to a cooling water leak, were reported last year. Over three years, 40 of the 104 U.S. reactors experienced one or more serious safety-related incidents that required additional action by the NRC, the report said.
"The NRC has repeatedly failed to enforce essential safety regulations," wrote David Lochbaum, director of the group's Nuclear Safety Project and author of the study. "Failing to enforce existing safety regulations is literally a gamble that places lives at stake."
NRC officials disputed the scientists' conclusions, saying none of the reported incidents harmed workers or the public.
Today is the two-year anniversary of the 2011 earthquake and tsunami that crippled Japan's Fukushima Dai-ichi plant.