Work resumes at Japanese reactor

22 March 2011Last updated at 03:14 GMT Efforts have resumed at Japan's Fukushima Daiichi nuclear power plant to restore electrical power and cool its overheated reactors, seriously damaged by the 11 March earthquake.The work was interrupted after emissions of white vapour and smoke from two of the reactors.Japan's chief cabinet secretary says it is impossible to say what the cause is.The plant's