Google has signed a deal to use small nuclear reactors to generate the vast amounts of energy needed to power its artificial intelligence (AI) data centres.

The company says the agreement with Kairos Power will see it start using the first reactor this decade and bring more online by 2035.

The companies did not give any details about how much the deal is worth or where the plants will be built.

Technology firms are increasingly turning to nuclear sources of energy to supply the electricity used by huge data centres that drive AI.

"The grid needs new electricity sources to support AI technologies," said Michael Terrell, senior director for energy and climate at Google.

"This agreement helps accelerate a new technology to meet energy needs cleanly and reliably, and unlock the full potential of AI for everyone."

Last month, Microsoft reached a deal to restart operations at the Three Mile Island energy plant, the site of America's worst nuclear accident in 1979.

In March, Amazon said it would buy a nuclear-powered data centre in the state of Pennsylvania.

Nuclear power, which is virtually carbon free and provides electricity 24 hours a day, has become increasingly attractive to the tech industry as it attempts to cut emissions while becoming more energy intensive.

However, critics say nuclear power is not risk-free and produces long-lasting radioactive waste.