I have never done it except for a few patients with palliation as treating the entire pelvis may increase the risk of complications of dialysis and also may decrease efficacy and with changes in peritoneal permeability unless treating localized field like prostate or below the peritoneal reflection....

I am not aware of any specific data to inform an answer, although ionizing radiation will definitely cause membrane permeability changes. I think that if the indication for RT is strong, the patient is aware of the risks, and the life expectancy is otherwise reasonable relative to the renal failure,...