He could survive if he could avoid getting hit directly, either by moving out of blast range or putting a sturdy enough barrier up if he can. The latter method is largely disputable, however.
He likely wouldn't survive a direct hit, though.
Also, I think this thread violates a certain rule in this forum; you might want to take a look at the Forum Rules in this thread:
http://www.killermovies.com/forums/f85/t462424.html
"All" characters must "originate" from a "game". Simply appearing in a game is not adequate, and a nuclear explosion isn't even a character.
Don't feel bad. I also made many comparable mistakes when I was new here.
Some other places you might be able to take this:
http://www.killermovies.com/forums/f85/t457928.html
http://www.killermovies.com/forums/forumdisplay.php?forumid=61
Hope it helps, and welcome to KMC.