In April 1954 the New York Times reported:
Prof. Ira M. Freeman, physicist of Rutgers University, thinks he has found the best solution of this “hot” waste problem. He would dump the wastes on Mars, or Venus or some other planet. . . . If there are objections Professor Freeman sees no reason why we should not throw the wastes overboard somewhere between the earth and the moon, whereupon they would revolve forever around the earth like satellites.
This is too outlandish for me to use and, to be fair, I can find no mention of it anywhere else, so it would seem Professor Freeman gained no traction with his suggestion.
NOTE
Kaempffert, Waldemar. 1954. “Atomic ashes? Dump them on Mars.’”New York Times, Apr. 18.