X-energy's $1B SMR Raise: Global Push, South Africa's Lessons
X-energy just raised more than $1 billion through an IPO and private placement to deploy its Xe-100 small modular reactors. The money will accelerate a technology that promises cheap, flexible nuclear power. For South Africa, the news is both a signal and a test.
Global SMR momentum builds
The Xe-100 is an advanced reactor design that generates around 80 megawatts per unit. SMRs like this are marketed as safer, cheaper, and faster to build than traditional plants. X-energy’s IPO shows investor appetite for nuclear bets, especially from tech companies hungry for clean power to run AI data centers. The US Nuclear Regulatory Commission is already reviewing the design. Expect more announcements from competitors like NuScale and Terrestrial Energy before year end.
South Africa's nuclear history haunts the present
South Africa has exactly two nuclear reactors at Koeberg, both from 1984, providing 5% of the country's electricity, per World Nuclear Association. The government has talked about adding 2.5 gigawatts of new nuclear capacity since 2024. That procurement was paused for public consultation. Meanwhile, the previous attempt at an SMR, the Pebble Bed Modular Reactor, cost R9.244 billion, over 80% from the South African government, and never produced a working plant, according to Wikipedia's PBMR entry. That project was killed in 2010 after years of delays and budget overruns. I keep coming back to that number: R9.2 billion of taxpayer money, zero watts.
What this means for investors
X-energy's raise is not a South African story. But the timing matters. Eskom still can't guarantee supply. Businesses and households face rolling blackouts. Nuclear could fill the gap, but only if South Africa can avoid repeating PBMR’s mistakes. The government has not yet signed any deal with X-energy or any other SMR vendor. The risk is that political pressure and energy desperation lead to another rushed procurement, another cost blowout, and another stranded asset. The quiet beneficiaries here are the data centre developers already queuing for grid connections. If SMRs ever get built, they get dedicated power. If they don't, the queuing gets longer.
Cross-border angle: AfCFTA could help harmonise nuclear safety standards across African markets, but no one is talking about that yet. South Africa is the only country on the continent with a commercial nuclear plant. Every other potential buyer of SMRs, Kenya, Ghana, Nigeria, would need their own regulators and grids to handle the output. X-energy's $1 billion is a vote of confidence in the technology, not in African policy coordination. Investors should watch South Africa's next steps on the 2.5 GW procurement. If the government signs a deal with X-energy or another vendor without a credible cost cap, assume the PBMR pattern repeats. If they insist on fixed-price contracts and strict timelines, the story changes.