Apollo, a U.S. asset management group, plans to provide a $6 billion loan to the British nuclear project Hinkley Point C being built by a French multinational electric utility company.

The deal would be among the biggest private capital investments in a project of U.K. national interest.

Apollo, a U.S. asset management group, plans to provide a $6 billion loan to the British nuclear project Hinkley Point C being built by a French multinational electric utility…