Activists raise alarm about radiation from Japan, but nuclear researchers say their fears are unfounded.Cynthia Papermaster has stopped eating fish from the Pacific Ocean. The Berkeley resident also tries to stay out of the rain, and even leaves her rain boots outside of her house. The reason? She's worried about radioactive fallout from the accident at Fukushima Daiichi Nuclear Power Station following the March 2011 tsunami and earthquake in Japan. "It's all one planet," she said. "The radiation will spread around the world." Papermaster, an activist with the Berkeley Fellowship of Unitarian Universalists Social Justice Committee, is part of a...