radioisotope dating

At www.sciencedaily.com/releases/2017/01/170131104433.htm … a paper by RB Hayes of North Carolina State University in Nuclear Technology (2017) claims there is a flaw in the radio-isotope dating technique which is used to pin down the age of rocks. The university news blurb does not give much away but it can be detrimental to uniformitarian geochronology or there would have been gnashing of teeth. It's all to do with the rate of differential mass diffusion. The calculations appear to be slightly awry.