Nuclear Reaction; A Mutation Story

"I Believe A Good Mutation Story Would Be If The People Who Were In Bomb Shelters Meant For Nuclear War Got Affected Because Even Though The Shelters Prevented Most Of The Explosion And Radiation, The Intensity Was Still Overpowering, Which Cause Some Of It To Penetrate And Deeply Scar The People -- But Not To The Point Of Death, Or Unrealistically, Like That They Would Have Actually Survived The Explosion. That Is Why The Shelter Being Strong, But Not Strong Enough, Is Important To The Entire Plot."