Yes, they're planning to use ChatGPT to fill out the documents which show that the nuclear reactor is safe:

The generative AI experiments tap in to Microsoft’s investment in OpenAI, creator of the viral chatbot ChatGPT. For the past six months, a team of Microsoft employees have been training a large language model with U.S. nuclear regulatory and licensing documents, hoping to expedite the paperwork required for such approvals, which can take years and cost hundreds of millions of dollars.