Estimate mutation rate in UVC treated cells

I am wondering how to get a coarse estimate of the number of mutation I obtain doing UVC treatment on eukaryotic cells (microalgae) starting from information such as the survival rate, genome size, number of genes or gene density… I heard about a similar estimation for EMS mutagenesis (I don’t remember the exact details but it was a correlation between number of colonies surviving the treatment and the number of point mutations per kb of genome). I cannot find the source of this kind of estimate so I really appreciate any help!