SHANGHAI - China will have to spend around 80 billion yuan ($12.74 billion) by 2015 to upgrade the security of its nuclear facilities and radioactive contamination control to international standards, a report issued by the Ministry of Environmental Protection said.

China, which has an ambitious plan to build as many as 100 reactors over the next two decades, imposed a ban on approving new nuclear power plants after Japan's nuclear crisis in March 2011 and ordered nationwide safety checks on its 41 plants.

The report, which laid out a road map for China's nuclear safety to reach international standards by 2020, suggested the government was moving closer to restarting the approval process for reactor expansion.