Nukes: The Next Generation
jonerik writes: "Following up on the weekend's posting on the revision of American nuclear war-fighting plans, the New York Times has this article on the difficulties in building a new generation of nukes. The American nuclear arms industry is much smaller now than it was ten years ago, testing the new, smaller "bunker busters" would be problematic, and no one's certain that a nuclear weapon with a tiny explosive yield that's capable of penetrating yards of reinforced concrete could actually be built."
This place has all you want to know about the "Golden Age" of American nuclear testing.
This is a picture of the Hardtack II / De Baca test, which was a small nuclear gravity bomb (11.3 inches in diameter, 15 inches long, weight 66 lb). It had a "disappointing" 2.2 kTon yield.
Even more interesting is Upshot-Knothole / Grable which was a nuclear cannon shell.
How small did they get? Here's the W54 (Davey Crockett) warhead, normally used as a rocket mortar round. It weighs 50 pounds, and has a yield of 22 TONS. Not Kilotons. Not megatons. Tons.
Of course small nuclear devices are possible, even workable. Not every miltary explosive needs to be like Castle/Bravo (the largest nuclear device the US has tested).