The Globe and Mail reports in its Wednesday edition that Alphabet's Google has contracted for 3,590 megawatts of power from Constellation Energy in the largest U.S. power grid, with new nuclear energy accounting for about one-quarter of that supply. A Reuters dispatch to The Globe says Constellation will make more than $4.3-billion (U.S.) of new investments in its fleet as part of the agreement, which involves adding capacity at several of the power company's nuclear reactors in the Midwest and mid-Atlantic regions. Major tech companies are racing to secure massive amounts of electricity supplies to power data centres across the U.S. by striking unprecedented power deals and reviving the country's nuclear industry. Over the past two years, Constellation unveiled an agreement to restart its Three Mile Island reactor in Pennsylvania to serve Microsoft data centres, while Google contracted to restart NextEra Energy's nuclear power plant in Iowa. In the latest arrangement, Google entered into a 20-year power purchase agreement for 890 megawatts of electricity from multiple Constellation-owned nuclear power plants, which would be upgraded. Electricity from the first of the upgraded plants is expected to be delivered in 2028.