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The minister spoke after the National Energy Council, a presidential advisory body, completed its latest National Energy Plan, which is to be signed by President Joko Widodo to become a presidential regulation.

The plan, last revised in 2006, lays down the ground rules and guidelines for energy development in Indonesia, as well as the country’s commitment to reduce greenhouse gas emissions.

The plan from 2006 still left room for nuclear energy, but the latest guidelines say Indonesia should increase the use of renewable energy sources to 23 percent of its total primary energy — from the current target of 5 percent — by 2025.

Energy from coal is slashed to 30 percent from 33 percent previously, but Indonesia will rely more on oil, which is set to account for 25 percent of energy in the next decade, from the previous target of 20 percent.

Natural gas will contribute the remaining 22 percent to reach the 2025 target, Sudirman said, without providing details on the energy mix target for 2050.

The minister added that Indonesia will continue to follow developments in the field of nuclear technology and that it would remain a last-resort option for possible use beyond 2050.

While having experimented with nuclear power since the 1950s, Indonesia currently only operates three small-scale reactors: a 100-kilowatt reactor in Yogyakarta, a 250-kW reactor in Bandung and a 30-MW reactor in Serpong, in Banten.

A previous proposal to build larger-scale plants on Central Java’s Muria peninsula and in Bangka-Belitung met with resistance from local residents who feared leaks on the scale of the Fukushima disaster in equally earthquake-prone Japan.

Another place that was under consideration to host a nuclear power plant was Kalimantan, where there are no volcanoes and the relatively large distance from tectonic fault lines means the chance of devastating earthquakes is limited.