(July 19, 2016, 2:24 PM EDT) -- PHILADELPHIA — A power company that was sued by a group of Pennsylvania residents who contend that it is liable for their injuries, including cancer, that stem from exposure to radioactive materials filed a brief in the Third Circuit U.S. Court of Appeals on July 15, arguing that it should let stand a lower court’s summary judgment ruling in the company’s favor because the plaintiffs lack admissible evidence of specific causation (Michelle McMunn, et al. v. Babcock & Wilcox Power Generation Group Inc., No. 15-3506 [consolidated], 3rd Cir.)....