The aging No. 3 and 4 reactors at the Takahama nuclear plant in central Japan were approved Wednesday by the nuclear regulator to continue operating for 20 more years, as the government maintains support of the technology’s use in the resource-poor country’s energy mix. The decision makes them the seventh and eighth reactors nationwide that the Nuclear Regulation Authority has green-lit for extensions after 40 years of operations. All four reactors at the facility in Fukui Prefecture have now been approved to run for 60 years. Both the No. 3 and No. 4 reactors are currently online and will rea…