Sen. Ron Wyden (D-Ore.) plans to question Ernest Moniz about his views on natural gas exports and the cleanup of the polluted Hanford nuclear site if the Massachusetts Institute of Technology physicist is nominated for Energy secretary.

Wyden is chairman of the Senate Energy and Natural Resources Committee that would vet Moniz, who served as undersecretary of Energy under President Clinton, if Moniz’s rumored nomination to run the Energy Department (DOE) comes to pass.

Wyden, in an interview to air Sunday, implied that they have not always seen eye-to-eye on Hanford.

“He . . . had a fair amount of involvement with respect to Hanford when he served in the government earlier, and we had some spirited discussions, let’s put it that way,” Wyden said on C-SPAN’s “Newsmakers” program.