As Southeast Asian nations seek to decarbonize their power grids while meeting surging electricity demand, several countries without existing nuclear infrastructure are moving toward nuclear energy. According to the International Atomic Energy Agency (IAEA), interest in Small Modular Reactors (SMRs) has grown across the region, with Thailand, Indonesia, and the Philippines identifying nuclear power as a viable pathway to achieving net-zero emissions targets by mid-century.
Thailand’s Shift Toward Small Modular Reactors
Thailand is actively exploring the integration of nuclear power into its long-term energy strategy. The Electricity Generating Authority of Thailand (EGAT) has signaled interest in SMR technology, citing its potential for lower capital costs and enhanced safety profiles compared to traditional, large-scale reactors. Unlike conventional plants that require massive water sources and extensive land, SMRs offer modular deployment, which allows for incremental capacity additions. The Thai government’s current Power Development Plan (PDP) reflects a strategic pivot toward cleaner base-load power to replace aging fossil fuel assets.
Indonesia’s Nuclear Roadmap
Indonesia, the largest economy in Southeast Asia, faces the dual challenge of rapid industrialization and a heavy reliance on coal. To address this, the National Research and Innovation Agency (BRIN) has been conducting feasibility studies on both large-scale and modular nuclear options. The Indonesian government views nuclear energy as a necessary component to stabilize a grid increasingly penetrated by intermittent renewables like solar and wind. According to the International Energy Agency (IEA), Indonesia’s energy transition strategy depends on securing reliable base-load power that does not rely on carbon-intensive fuels, positioning nuclear as a candidate for the 2030s and beyond.
The Philippines and Energy Security
The Philippines has taken concrete steps toward re-establishing a nuclear program, driven by high electricity costs and the need for energy independence. Under the current administration, the Department of Energy (DOE) has engaged in discussions with international partners, including the United States, regarding the 123 Agreement. This legal framework facilitates the transfer of nuclear technology and expertise. Unlike previous decades, the focus is now on modern, safer reactor designs that can be integrated into the existing grid without the massive infrastructure requirements of the dormant Bataan Nuclear Power Plant.
Comparative Outlook: Why SMRs Are Gaining Traction
The shift toward nuclear in Southeast Asia is defined by a transition from traditional, massive reactors to flexible, modular designs.
| Feature | Large-Scale Reactors | Small Modular Reactors (SMRs) |
| :— | :— | :— |
| Capital Cost | Very High | Lower (per unit) |
| Construction Time | 7–10+ Years | 3–5 Years |
| Flexibility | Limited | High (modular expansion) |
| Safety Profile | Active systems | Passive, inherent safety |
*Data compiled from IAEA and IEA technology assessments.*
Challenges to Regional Adoption
Despite the momentum, significant hurdles remain. Public perception regarding nuclear safety remains a primary concern in many Southeast Asian nations, shaped by historical incidents such as the Fukushima Daiichi accident. Furthermore, building the necessary regulatory frameworks—as required by the IAEA’s “Milestones Approach”—takes years of legislative and institutional development. Countries must establish independent nuclear regulatory bodies, manage radioactive waste, and secure long-term financing before a single reactor can be commissioned. As these nations refine their energy policies, the pace of adoption will likely depend on the successful deployment of pilot projects and the maturation of global SMR supply chains.
Related reading