Addicts lessons:1

So, what comes in mind when we mention the word "NUCLEAR"......my guess would be the bombs right? Why would'nt you think of that? Its symbolic.. The reason I brought this up is because of something that I've learned in class yesterday...Oh! btw, sorry that I went MIA for the past one week! So much for the commotions! My previous post nampak je macam semangat...last-last habuk pun takda sampai la ni! Ok...back to where we were....In class, we were discussing about reactivity. Basically reactivity is the functional change in neutron population per generation. In layman's term, reactivity is the rate where a chemical substance tends to undergo a chemical reaction. Why is this so important then??

Well, recognize this..... Uranium?? What happens if it goes under reactivity?But first,what is uranium?? In nature, uranium is found as uranium-238(99.284%), uranium-235 (0.711%) and a very small amount of uranium (0.0058%).The rest my fellow addicts, just googled it.........or browse through the ever wonderful wikipedia...

What interests me the most about yesterday's lecture is how reactivity influences the activity of neutrons of a reactor fuel....Oh, the reactor's fuel are uranium.....So, by manipulating the level of reactivity of the fuel, the Fatman and the Little Boy were born!!!! Ahhhhh......here is where I got very interested!
So, introducing the FATMAN!


hello everyone! Im cute but I'll bite!

And the lightweight LITTLE BOY!!

Im small but Im mean!...I mean it...

So, lets learn someting about this two bombs.....
Fat Man and Little Boy were very different bomb designs. Fat Man was an implosion device using plutonium. Little Boy was a simple gun design using enriched uranium (that is, the fraction of highly fissile U-235 compared to less fissile U-238 was increased compared to naturally occuring uranium.) Basically, a slug of uranium was fired into a target at the other end of the bomb to assemble the critical mass.

The designers were confident that the gun design for the uranium bomb would work. Also, there wasn't enough enriched U for a second bomb so a test of that one would be a waste. Tests with Pu determined that it was too reactive for the gun mechanism to work (the device would go off prematurely before developing its full yield, a so-called fizzle). So the implosion mechanism was the way to go. This, however, was not a sure thing. Since Pu was more plentiful, it was clear that the implosion mechanism would have to work. Before dropping an implosion-based weapon, they wanted to make sure it would work. Thus the Trinity test.


i may look like a mushroom but i dont taste like one!



The shapes of the bombs give away the mechanism. Little Boy was long and narrow along shape of the gun. Fat Man was... rotund.
Untuk disimpulkan dan dijadikan cerita, Fatman was created sebab plutonium 239 has such a fast spontaneous fission rate..This is covered yesterday by my super knowledgeble lecturer in the effect of delayed and prompt neutron on power changes..So, Seth Neddermeyer created an idea to compress a small sphere of plutonium quickly to a required density that will make the plutonim go critical and produce a nuclear explosion So, the Fatman is an improved version of the Little boy because the little boy is too slow to work with such isotope..... In the end, hail the technology and discovery......not to what it had done to Hiroshima and Nagasaki.....

Hrrrmmmmm..........now you know the differences between the Fatman and Little boy....How bout the differences between a nuclear bomb and a nuclear reactor???? Stay tuned! Thx for reading addicts!!!!