Thailand, a country that has never operated a nuclear power plant, has just laid out a roadmap to build one within roughly a decade. The state utility running the plan insists nothing is set in stone — no site, no vendor, no final government sign-off. But the timeline, the technology, and the ambition behind it are real, and they say something bigger about how Southeast Asia is quietly repositioning itself for a nuclear-powered future.
Who’s Behind This, and What Exactly Was Announced
The plan comes from the Electricity Generating Authority of Thailand, known locally by its Thai acronym EGAT (กฟผ., pronounced roughly “gor-for-por”). EGAT is the state-owned utility that generates the bulk of Thailand’s electricity and operates the backbone of the national grid — the rough equivalent of a combined national grid operator and dominant power generator rolled into one, similar in role to Vietnam’s EVN or Malaysia’s TNB.
Speaking at a business seminar in Bangkok organized by Thansettakij (ฐานเศรษฐกิจ), one of Thailand’s leading Thai-language business and economics newspapers — think of it as occupying a similar niche to a national Financial Times or Nikkei — EGAT’s Deputy Governor for Power Plant Development and Renewable Energy, Siriwat Chetsri, confirmed that the utility has begun formal development work on a Small Modular Reactor (SMR) with a capacity of 300 megawatts (MW), targeting commercial operation by the Thai calendar year 2580, which corresponds to 2037 on the Western calendar.
If “small modular reactor” sounds like industry jargon, the concept is fairly intuitive once explained. Traditional nuclear plants are enormous, custom-built, multi-gigawatt facilities constructed almost entirely on-site — closer to building a cathedral than assembling furniture. SMRs flip that model. Their core components are manufactured in a factory as standardized modules, shipped to the site, and bolted together — more like how a modern car is assembled from pre-built parts on a line rather than hand-forged piece by piece. The International Atomic Energy Agency generally defines SMRs as advanced reactors producing up to around 300 MW per unit, exactly the size class Thailand is now pursuing.
This single reactor is not an isolated curiosity. It is the first building block of a far larger ambition buried in Thailand’s energy planning: the country’s draft Power Development Plan (PDP) — the national roadmap, periodically revised by the Energy Ministry, that maps out where Thailand’s electricity will come from for the next 20-plus years — now envisions total SMR capacity of roughly 9,000 MW by 2050, spread across as many as 30 reactor units. That is a striking jump from an earlier draft plan (PDP2024), which had proposed just two 300 MW units totaling 600 MW. In other words, EGAT’s single reactor project is the opening move in what could become one of the most ambitious nuclear buildouts in Southeast Asia.
The Three-Phase Roadmap, Explained
EGAT has broken the project into three sequential phases, and understanding them explains why “2037” is simultaneously an ambitious and a cautious target.
Phase 1 — Preliminary Feasibility (now). EGAT is currently assessing candidate reactor technologies and potential sites, while preparing the mountain of documentation needed to bring the project before Thailand’s Cabinet (ครม., the Council of Ministers — the country’s top executive decision-making body, chaired by the Prime Minister) for formal approval. This phase also includes long-lead planning items most outsiders wouldn’t associate with a power project this early: workforce and staffing plans, specialist training pipelines, and even an advance framework for how the plant will eventually be decommissioned decades from now. Siriwat indicated Thailand expects to reach the Cabinet approval milestone within three to five years.
Feeding into this phase is a self-assessment against the IAEA’s so-called “Milestones Approach” — a globally recognized 19-point checklist covering everything from legal frameworks and safety regulation to funding, waste management, and public engagement, which the IAEA uses to help “newcomer” nuclear countries measure their readiness before committing to build. Thailand plans to compile a comprehensive report against these 19 benchmarks and invite IAEA experts to independently verify its findings before the project advances.
Phase 2 — Full Feasibility and Permitting. Once Cabinet approval is secured, the project moves into a complete feasibility study, formal environmental impact assessment, site permitting, and the preparation of bidding documents to select a construction contractor.
Phase 3 — Construction. EGAT estimates the actual construction period at just five to six years — notably faster than a conventional large-scale nuclear plant, which can take a decade or more. That speed is the entire selling point of the modular design: because major components are pre-fabricated off-site, on-site construction is closer to a large-scale assembly job than a ground-up build. Once operational, EGAT expects the plant to run for 60 to 80 years — a service life longer than most people’s careers, and long enough that a reactor commissioned in 2037 could still be generating power in the 2110s.
Why Now: Thailand’s Energy Security Math
The push into nuclear isn’t happening in a vacuum. Thailand currently leans heavily on imported liquefied natural gas (LNG) to keep its grid running, and roughly a quarter of those imports have historically come from the Middle East — a region whose supply reliability took a hit as tensions escalated there in 2026, on top of ongoing disruption from the Russia-Ukraine war. For a country that imports the majority of its primary energy, that kind of exposure is a genuine strategic vulnerability, not an abstract risk.
แนะนำ
Uranium, by contrast, is sourced from a more geographically diversified set of suppliers — Australia, Canada, Kazakhstan, and others — which makes it structurally less exposed to any single geopolitical flashpoint. That diversification logic, more than any single event, is what has pushed nuclear power — and SMRs specifically, given their lower upfront capital requirements compared to giant conventional reactors — back onto the agenda of energy planners across the region.
There’s also a demand-side story. Thailand’s PDP planners are increasingly factoring in surging new sources of electricity demand: electric vehicle charging, data centers, and high-speed rail expansion. Planners have noted that peak demand is drifting later into the evening — between 8 and 9 p.m. — a pattern consistent with EV charging habits, and one that reshapes exactly what kind of “baseload” generation the grid will need in the 2030s and beyond. Nuclear, which runs continuously regardless of weather, is one of the few technologies that can reliably backstop that kind of demand growth alongside solar and wind.
An Open Technology Race — With Global Names in the Running
One of the more commercially interesting details in EGAT’s announcement is how deliberately open-ended the vendor selection remains. EGAT says it is entertaining SMR technology from the United States, China, Russia, and Canada, and has already signed multiple non-binding memoranda of understanding (MOUs) — cooperation agreements for exchanging technical information and exploring technology transfer — with players across that field.
South Korea is also very much in the picture, even though it wasn’t named in EGAT’s own remarks. Korea Hydro & Nuclear Power (KHNP), the company behind the Barakah plant in the United Arab Emirates — the most recently completed large nuclear construction project delivered on schedule to a first-time nuclear nation — has an active feasibility agreement with EGAT and is widely viewed as one of the most credible near-term partners.
The American path got a meaningful boost in 2026 when the U.S. Department of Energy added Thailand to a list of countries authorized for streamlined access to certain American nuclear technology and assistance, easing what had previously required case-by-case approval. That doesn’t mean an American reactor design is the front-runner — Thailand has been careful to say no technology has been chosen — but it does mean Westinghouse, GE Hitachi, and other U.S. vendors now have a clearer legal runway to compete for the contract.
On siting, EGAT’s early preference is pragmatic rather than glamorous: build on land it already owns. Existing EGAT sites typically already have transmission infrastructure and grid connections in place, which meaningfully cuts the capital cost of a new plant compared with developing raw greenfield land. Draft plans have floated a geographic split — with capacity divided between Thailand’s Northeast and South — spreading the new generation capacity across regions rather than concentrating it near Bangkok.
On cost, Thailand hasn’t published firm figures for the current SMR configuration, but an earlier planning-stage estimate for a 600 MW, two-unit version of the project put total investment at roughly 93 billion baht (approximately US$2.8 billion), with projected lifetime electricity sales revenue of around 780 billion baht (about US$23.6 billion) and more than 43 billion baht (roughly US$1.3 billion) in potential contract opportunities for the local supply chain during construction. Those numbers are illustrative of scale rather than a locked-in budget, since the project’s configuration has already shifted since that estimate was made — but they give a useful sense of the capital intensity involved.
How Thailand Stacks Up Against Its Neighbors
Thailand is not moving alone, and it isn’t even the most advanced country in the race. Across Southeast Asia, energy consultancy Wood Mackenzie estimates the region will need roughly $208 billion in investment to build 25 gigawatts of nuclear capacity by 2050, with SMRs as the preferred technology despite their relatively high per-unit costs.
แนะนำ
Vietnam is furthest along. After reversing a 2016 decision to cancel its nuclear program, Hanoi restarted the effort in late 2024, passed a new Atomic Energy Law effective January 2026 designating nuclear as a national strategic priority, and in March 2026 signed an intergovernmental agreement with Russia’s Rosatom to build two large VVER-1200 reactors at Ninh Thuan, targeting completion by 2035 alongside at least one SMR-based project. Vietnam’s longer-term ambition is for nuclear to supply 6 to 8 percent of national electricity by 2050, with a regional forecast suggesting Vietnam alone could reach 10.5 to 14 gigawatts of nuclear capacity by that date.
Indonesia has taken a more modest but concrete step, incorporating two 250 MW SMRs into its 2025–2034 national electricity supply plan, aiming for nuclear to supply about 5 percent of generation by 2040. The Philippines is targeting first nuclear power between 2035 and 2038 — a very similar window to Thailand’s own target. Malaysia has set a goal of 1.2 gigawatts of SMR capacity, though regulatory delays have already pushed that target from 2031 out to 2035.
Set against that backdrop, Thailand’s 2037 target for its first reactor doesn’t look like an outlier — it looks like the median expectation for a wave of Southeast Asian nations converging on nuclear power at roughly the same time, all chasing the same mix of energy security and decarbonization goals, and increasingly competing for the same pool of vendor attention and technology transfer agreements.
The Trust Problem Nobody Can Engineer Away
For all the technical planning, EGAT’s own messaging keeps circling back to a non-technical challenge: public acceptance. Nuclear power carries lingering public unease worldwide, rooted in the Chernobyl disaster of 1986 and the Fukushima accident of 2011, and Thailand — a country with zero operational nuclear history — starts this conversation from scratch with its population. Siriwat was explicit that building public understanding and confidence among communities and stakeholders is treated as a parallel workstream running from the very start of the project through to completion, not an afterthought bolted on once a site is chosen. Given that Thailand hasn’t even selected a location yet, the community that will eventually host this reactor doesn’t currently know it will.
What This Means If You Do Business In or With Thailand
For now, treat this as a credible long-range signal rather than an imminent construction project. No site has been chosen, no contractor has been hired, and the Cabinet hasn’t approved anything yet — EGAT itself frames the next three to five years as preparatory. But the direction is clear, and it opens several concrete windows worth watching.
If you’re in energy engineering, nuclear components, or specialized construction, Thailand’s technology-agnostic MOU strategy means the vendor competition is still wide open — American, Chinese, Russian, Canadian, and South Korean players are all still in play, and the contracts, training partnerships, and supply-chain agreements that precede a final decision are already being negotiated now, not in 2034. If you’re an investor thinking about Thai utilities or power infrastructure, the realistic near-term financial exposure sits with EGAT and the state budget rather than public equity markets, since this remains a state-led utility project. And if you’re simply trying to understand where Thailand’s electricity — and by extension its industrial capacity and data center growth — is headed over the next 20 years, this SMR program is now a real, if early-stage, pillar of that answer, running in parallel with Thailand’s continued build-out of solar, wind, and gas capacity.
Key Takeaways
- EGAT, Thailand’s state power utility, has begun formal development of a 300 MW small modular nuclear reactor, targeting commercial operation by 2037.
- The project follows a three-phase roadmap: feasibility and Cabinet approval (3–5 years), full permitting, and a 5–6 year construction phase, with the finished plant expected to run for 60–80 years.
- No site, vendor, or final government approval has been chosen yet — EGAT is keeping the technology field open across the US, China, Russia, Canada, and South Korea.
- Thailand’s plan fits a broader Southeast Asian pattern, with Vietnam, Indonesia, the Philippines, and Malaysia all pursuing nuclear or SMR programs on similar 2030s–2050 timelines.
- The drive is fueled by energy security concerns over imported LNG and rising electricity demand from EVs and data centers, alongside global decarbonization pressure.
Frequently Asked Questions
Q: Is Thailand actually going to build a nuclear power plant?
A: Thailand has begun formal preliminary planning for a small modular reactor and set a 2037 target, but the project still needs Cabinet approval, a chosen site, and a selected vendor before construction can begin.
Q: What is a Small Modular Reactor (SMR), in simple terms?
A: It’s a nuclear reactor built mostly from standardized, factory-made components that are shipped to a site and assembled, rather than constructed entirely on-site like a traditional large nuclear plant — making it faster and generally cheaper to build.
Q: When will Thailand’s first nuclear reactor start operating?
A: EGAT is targeting commercial operation by the Thai year 2580, equivalent to 2037 on the Western calendar, though that date depends on securing Cabinet approval within the next three to five years.
Q: Where will the reactor be built?
A: No site has been chosen yet. EGAT has said it prefers to prioritize its own existing land, since that land already has grid connections and infrastructure in place, which would lower construction costs.
Q: Which country’s nuclear technology will Thailand use?
A: That hasn’t been decided. EGAT has signed preliminary cooperation agreements with parties from the United States, China, Russia, and Canada, and South Korea’s KHNP is also an active partner in feasibility studies.
Q: Why is Thailand interested in nuclear power now?
A: Thailand relies heavily on imported natural gas for electricity, and recent global instability has exposed the risks of that dependence. Nuclear fuel comes from more geographically diverse sources, and rising electricity demand from EVs, data centers, and industry is pushing planners toward reliable baseload power options.
Q: How does Thailand’s nuclear timeline compare to its neighbors?
A: It’s broadly in line with the region. Vietnam is furthest ahead, already under construction agreements for 2030–2035, while the Philippines and Malaysia are targeting similar or slightly later windows to Thailand’s 2037 goal.
Q: How much will this cost?
A: No official budget for the current plan has been published. An earlier draft version of a larger 600 MW project was estimated at around 93 billion baht (roughly US$2.8 billion), though the project’s scope has since changed.
Q: Is nuclear power safe in an earthquake- or disaster-prone region?
A: Site selection processes for nuclear projects include mandatory assessments of seismic activity, flooding risk, and other natural hazards, and modern reactor designs — including SMRs — incorporate passive safety systems developed in response to lessons from past accidents like Fukushima.
Q: Will this affect electricity prices for businesses or consumers in Thailand?
A: It’s too early to say. Nuclear plants carry high upfront costs but low ongoing fuel costs and very long operating lifespans, so any price impact would likely play out gradually over decades rather than immediately.
Q: What government approval is still needed?
A: EGAT needs sign-off from Thailand’s Cabinet, along with a clear national policy framework, before the project can move from feasibility studies into full permitting and construction planning.
Q: Is this good news for foreign nuclear technology companies?
A: Yes — Thailand’s technology-neutral approach, combined with a wave of similar projects across Vietnam, Indonesia, the Philippines, and Malaysia, means global vendors have an active and still-open commercial opportunity across the region.
