SANYA, China — Japanese authorities may be exaggerating the scope of the country’s nuclear disaster to reduce the liabilities of insurance companies, Russia’s nuclear chief said Wednesday. Japanese officials on Tuesday upgraded the severity of the emergency at the tsunami-damaged Fukushima Daiichi plant to a 7, putting it on par with the 1986 Chernobyl nuclear disaster, the world’s worst. “It is hard for me to assess why the Japanese colleagues have […]