As reported by the ExchangeMonitor.
See the U.S. House Energy & Commerce Committee/Subcommittee on Environment and Climate Change's post about the June 13th hearing, here. (A Livestream posted at that same link goes live at 10am, Thurs., June 13.)
Witness testimony that has been posted thus far includes that from:
Robert J. Halstead
Executive Director
State of Nevada, Office of the Governor, Agency for Nuclear Projects
Geoffrey H. Fettus
Senior Attorney, Nuclear, Climate, and Clean Energy Program
Natural Resources Defense Council