Three advanced reactors now hold criticality in the US. This milestone arrives just before the July 4 deadline set by the Trump administration. Deployable Energy provided the third unit to reach this state, signaling a transition from laboratory prototypes to operational hardware.
Oklo just secured a massive regulatory win. The US Department of Energy approved the Final Safety Analysis for the Groves Isotope Test Reactor in Texas. No other project has achieved this on privately owned land using purely commercial fuel and systems.
| Project | Location | Status/Milestone | Key Metric |
|---|---|---|---|
| X-energy | United Kingdom | GDA Application Submitted | 6 GW Target |
| Oklo | Texas, USA | DSA Approved | Private Land/Fuel |
| Deployable Energy | USA | Criticality Reached | 3rd Advanced Reactor |
Regulatory speed in Texas and London contrasts sharply with the stagnation in orbital logistics.
Boeing Starliner remains grounded. A NASA Office of the Inspector General audit confirms helium leaks and propulsion failures persist as of March 2026. Human-rating certification is now a floating target with no fixed date.
NASA is repurposing hardware to find quick wins. The Promise rover, an engineering model of Perseverance, may head to the Moon. Its multi-mission radioisotope thermoelectric generator (MMRTG) allows it to survive the lunar night.
"That would be an awesome capability."— Jared Isaacman, NASA Administrator
While the US and UK push physical hardware, theoretical physics is rewriting the transit map.
A Brazilian researcher uncovered a 153-day route to Mars. This trajectory was hidden in discarded asteroid tracking data. It remains a geometric possibility rather than a flight plan, yet it challenges the two-year round-trip assumption.
- X-energy Xe-100: 80-MWe capacity per unit.
- Deployment scale: 4-12 unit plant configurations.
- UK Goal: Up to 6 GW capacity via Centrica partnership.
- Regulatory window: GDA process expected to conclude by end of 2029.
The Delta
Six months ago, advanced SMRs were largely discussed as design goals. Today, the data shows a hard delta: multiple units have achieved criticality and the first private-land DSA approval is official.
Industrial heat is the next frontier. X-energy’s Xe-100 produces both electricity and high-temperature steam. This capability allows nuclear power to penetrate heavy industry beyond the electrical grid.