Fusion bombs produce radiation because they need a nuclear explosion (produced by a nested fisssion bomb) to detonate. Furthermore, fusion bombs do not use hydrogen, but deuterium and tritium which are isotopes of hydrogen. The last one being a radioactive element.
Five years ago, I did a talk on nuclear bombs. I you want to read them, I put the material I used a this time on my web site at :
http://www.multimania.com/sadic/Nuke
Unfortunatly, after these years, some illustrations are missing. I advice you to read the file effets.htm which deals with the effects of nuclear explosion and first.htm wich explain how the first nuclear warheads were made. Then it deals on how fusion bombs are made. A lot of reading for those interested by the subject... It is very frightening too
BTW, the most powerful nuclear explosion on Earth occured in the 60s during a russian test. It was a 98 megaton fusion warhead (still far less than the 500 Mega Kitties have). Russian most powerfull were 2 Megaton, USA 1.2 Mega (i believe), and French 900 KiloT. To compare, Hiroshima was "only" 15KT. So I never read AS but it must have been a slaughter
I precise, that despite the fact I am interested by the subject, I am not for the use of such weapons. But it is not the kind of subject this board is intended for...