[@BlueJayBaseball]

Well I mean...what's the plot exactly? Are there rival Clans? What effects does the radiation have on the cats? What ranks are open?

all you've written is 
"A Clan of very large cats. The Clan is called RadioactiveClan and they're infected by radioactive waste" which in and of itself sounds interesting but it doesn't really give people much to go on in terms of knowing the kind of plot you want to follow or the kind of character they should create for it