In a new report, the Chinese government has laid out a plan to upgrade the security at its reactors over the next decade, suggesting that the country may be ready to resume a planned expansion of its nuclear sector halted in the aftermath of the Fukushima disaster.

The Ministry of Environmental Protection report indicates that roughly 80 billion yuan ($12.75 billion) will be required by 2015 to upgrade radioactive-contamination controls at the nation’s plants to international standards. Making the challenge more complicated, the report said, is the variety of reactors in place across China and “multiple standards of safety.” “The current [nuclear] safety situation isn’t optimistic,” the report said.

The report recommended the phasing out of older nuclear reactors and an increased emphasis on research and development into nuclear safety and radioactive waste handling. While not specifying any timeline for new nuclear reactors, the report suggested the nation is getting closer to restarting the approval process for new plants. China suspended approval of new projects in 2011 following the nuclear crisis in Japan.