How nuclear power plants use three cooling loops and why they need rivers or oceans. Palo Verde Arizona desert nuclear plant uses 60,000 GPM treated sewage. CRYOLOOP modular cryogenic cooling at -100°C could replace condenser cooling towers for SMRs — enabling true zero-water nuclear power in deserts.
If you have ever driven past a nuclear power plant, you have seen the steam. Massive white plumes billowing from hyperbolic concrete towers, rising hundreds of feet into the sky before dissipating. Most people assume that steam is something dangerous — radioactive exhaust, perhaps, or the byproduct of splitting atoms. It is not. It is water vapor. Plain evaporated water, rising from cooling towers that work on the same principle as sweat evaporating from your skin. And the sheer volume of that evaporation — tens of thousands of gallons per minute — is the reason every nuclear power plant in the world is built next to a large body of water. Except one. The Three Loops: How a Nuclear Plant Actually Works A nuclear power plant is, at its most fundamental level, a steam engine. An extraordinarily sophisticated one, but a steam engine nonetheless. The nuclear fission reaction produces heat. That heat boils water into steam. The steam spins a turbine. The turbine drives a generator. Electricity flows out. But the process requires three separate water circuits — three "loops" — each serving a distinct thermodynamic purpose. Understanding these loops is essential to understanding why nucl