Re: Why doesn't H-bomb cause the fusion of Hydrogen in ocean?

The short answer is a lack of pressure and temperature on the outside edge
of the fireball.  

The temperature needed to initiate fusion is on the order of millions of
degrees at enormous pressure.  The only location where both conditions
exist adequately, is in the middle of a fission explosion.  Compare this to
the "merely" several thousand degrees that the thermal radiance on the
outside of the blast reaches.  

The best refererence book for all things nuclear bomb related would be "The
Effects of Nuclear Weapons" Samuel Glasstone, Editor, 1964 edition.  Copies
are scarce and VERY expensive.  If you get one with the "weapon effect
computer wheel" in the back, you have a real find.  

Scott Kniffin
Radiation Effects Engineer
NASA GSFC