Holman Jenkins, WSJ - A defective radiation-risk standard holds back our most important low-carbon energy source - nuclear power. What keeps nuclear costs high? The “linear no-threshold” model of radiation risk has become the world’s go-to standard for nuclear safety, source of repeated (and unfulfilled) forecasts of thousands of cancer deaths from Chernobyl or Fukushima. LNT is why nuclear plants shoulder artificially huge costs not to protect against accidents, but to protect against trivial emissions.