A tiny nuclear reactor in the Utah desert just powered an Nvidia Blackwell chip.
No grid. No water. No noise.
Just atoms doing their thing.
And with that quiet moment on July 1, the AI industry crossed a line it's been inching toward for years.
👉 A first-of-its-kind demo: a small nuclear microreactor directly powering an AI data center.
A California startup. Founded by Isaiah Taylor. Backed by roughly $450M in funding at a $2B valuation.
Their reactor isn't the giant cooling-tower kind you're picturing.
It's small. It's helium-cooled. And it doesn't sip a drop of water.
That last part is the whole point.
A quiet, thirsty one.
Every ChatGPT query. Every image gen. Every Sora clip.
Somewhere, a cooling tower is evaporating water into the sky.
Valar's high-temperature reactor skips water entirely.
Nvidia paired it with its new closed-loop liquid cooling design for the DSX data center — which the company claims can crush facility water use from 2.6 million gallons per megawatt per year down to near zero.
Combine the two and you get something wild:
👉 An AI factory that runs on atoms, cooled by gas, using almost no water.
Big Tech is desperate for power.
So desperate they're building behind-the-meter plants — private power stations that dodge the grid, dodge permits, dodge angry neighbors.
Most of these have been natural gas.
Now nuclear is knocking.
The Trump administration issued executive orders last year aiming to quadruple US nuclear deployment. Ten startups are racing in a DOE pilot to hit criticality.
Valar just leapt to the front of that pack.
The AI arms race isn't just about chips anymore.
It's about energy sovereignty.
Whoever cracks cheap, clean, water-free power at scale… doesn't just build data centers.
They build the future economy on top of them.
And today, a small reactor in Utah quietly showed everyone what that future looks like.
Smaller than expected.
Faster than expected.
And already humming.
That's all for now!
