Radiation News Roundup for May 18, 2013 Ships tracked the surface pathway of radioactive plume of cesium-134 and cesium-137 released by Fukushima disaster. biogeosciences.net Atomic Energy of Canada assured federal nuclear safety officials Wednesday that there was no danger when a Chalk River nuclear operator mistakenly closed a vital pumping system that cools the immense heat generated within the NRU reactor’s core. ottawacitizen.com Plans for the Cigéo facility to dispose of radioactive waste at Bure in France have reached the stage of final public consultation. world-nuclear-news.org Belgian reactor operator Electrabel is preparing to restart units at Tihange and Doel after national nuclear regulators confirmed that crack-like indications discovered in the reactors' pressure vessels are of no safety significance. world-nuclear-news.org