Google parent company Alphabet is close to a multi-year nuclear power purchase agreement with Constellation Energy, the largest nuclear reactor operator in the United States, according to people familiar with the matter. Alphabet will pay Constellation at least $1 billion, and an announcement could come as early as this week. If the deal is announced as scheduled, it would be Constellation's second agreement with a tech giant in two weeks, following a similar deal signed with Amazon last week. The massive electricity demand driven by the AI boom is fueling renewed interest in nuclear power, with recent deals by tech giants focusing on existing nuclear facilities.