Big Tech bets on nuclear uprates as the easy wins start running out

Big Tech has found a faster way to get more nuclear power onto the grid. The catch is that there aren’t many places left to do it. Google, Amazon, Microsoft and Meta need enormous amounts of electricity for AI data centers and cloud computing. A growing share of that hunger is now being fed by upgrading reactors that already exist, rather than waiting years for new ones to be built. The details: more megawatts from the same old plants The industry term is an uprate. Think of it as tuning a car’s engine for more horsepower instead of buying a new car. Operators modernize equipment at an existing reactor so it can produce more electricity than it was originally rated for. The largest example so far is a deal between Google and Constellation Energy announced on October 6, 2026. It is a 20-year power purchase agreement, or PPA, which is a long-term contract in which a buyer commits to purchasing a plant’s electricity at agreed terms. Under the deal, uprates across 11 reactors are expected to add 890 MW of capacity. All of those reactors sit on the PJM grid, one of the largest regional power networks in the US. The investment involved exceeds $4.3 billion. Initial capacity is expected t...