Reactors
The original stop. Modular thorium molten-salt designs exist now, and more of them keep appearing. That does not mean one is qualified for space. It means the hardware conversation is no longer theoretical.
Working brief · resurrected 2026
Tranquility
Power for compute. On the Moon. Asked in public.
This is a constraints-first evaluation of using containerized thorium reactors to run AI training compute on the lunar surface. It was shelved because it sounded crazy, and because the hard stops were real. Those stops have moved. The papers are still here. You can read them, and you can ask them questions.
It is not a funded program. It is not a SpaceX contract. It is the record of someone thinking about power for compute before the grid runs out of polite answers. In about ten months the constraints moved. That is why it is back on the desk.
Lift
Mass to the lunar surface is a Starship-class problem. Pink House does not build rockets. The papers treat lift as a SpaceX solution — if that class of vehicle works, the cargo math starts to close.
Time
Earth-side AI power demand is opening a gap the announced terrestrial projects do not cover. Time is running out, which is why this evaluation is more likely now than when it was put on the shelf.
Cost
Cost is a function of time and markets: launch price, reactor price, and the price of not having compute. The papers use order-of-magnitude figures. Treat them as planning numbers, not a bid.
Ask Tranquility
Questions go to the white-paper corpus — power, cooling, reactors, lift, waste, manpower, Earthside support. The model is told not to invent a contract or a flight rate. If the papers do not say it, it should say so.
Answer
How to read this
This is an exploration, not a prospectus. Do not take the 2025 gigawatt and dollar figures as a bid. Take the method seriously: name the stops, and notice when they move. The short note is here.
The paper library
Start with the August 2026 notes. The older files stay up so you can see what changed.
- Heat management: sintering, and why orbit will not work
- Water, hydrogen, and what you do not mine
- How to read Tranquility in 2026
- AI power consumption projections — the GW canyon
- Transportation of thorium reactors
- Molten salt and ingredients in Tranquility MSRs
- Nuclear waste on the Moon
- Lunar cooling calculations
- Cooling methods and costs, revisited
- Optimal locations for lunar bases
- Earthside facilities
- All papers