Nuclear+Fallout

1-Nuclear Fallout is the precipitation that descends from a [|nuclear blast] that occurs in an open, non-sheltered area. The debris resulting from nuclear blasts becomes contaminated with radiation upon the explosion. 2-Local Fallout concerns the immediate area within the nuclear explosion that will be affected by the radiation. When an above-surface nuclear explosion occurs, the land and/or water which was hit will begin to rise up into the sky. This forms the notorious "[|mushroom] cloud" commonly associated with large explosions. In this cloud of debris is a dense concentration of radioactive particles, especially at the top of the cloud. All of the matter swept up into the air from the heat of the explosion mixes with fission products, and become radioactive and dangerous. Half of the particles in the cloud will land on the surface within 24 hours of detonation. If enough are of high radioactivity, they can cause immense harm to anyone near them, and to the water sources and other resources near ground zero. Weather plays a role in how catastrophic the fallout will be, and what areas it will affect. If there is heavy precipitation, the particles will descend a lot faster towards the ground and not be able to spread as far as dry fallout can. Wind will also greatly affect where the fallout spreads.



3- Radiation sickness is a broad term that can be applied to any illness caused from radiation, but not all symptoms or causes are alike. Determine the amount of radiation that causes sickness is not a simple task. There is no solid number to go by. Instead, the dosages of radiation are determined from factors such as intensity of radiation, exposure time, type, and how much radiation the body absorbs. The name for all of these measures combined into one unit is "sievert", or Sv. There approximately .0001 Sv received after an X-Ray of the chest. Considering this, it takes a short burst of .75 Sv to make one feel nauseous and weak. An exposure of 10 Sv is fatal, no matter what treatment is given. So it would take roughly 7,500 X-Rays per year to make someone feel queezy.

4- Nuclear Fallout zones become safe for people to traverse and exist within after about one month (three to five weeks). The levels of radiation emitted from ground zero of a nuclear blast can initially be around 30 Sv per hour. Within a few though, the levels will exponentially decrease until they are safe.

5- Fallout shelters in the United States lost their popularity after the cold-war. Without a big government like Russia threatening the U.S. with nuclear war, the craze of a nuclear attack's hype died down. The people started to ignore the possibility of a nuclear threat after the cold-war, and nuclear fallout shelters were abandoned, along with the demand. Also, people now favor the idea of simply evacuating the scene of fallout as quickly as possible, rather than to stay in a shelter. Getting away from the radiation is a far more effective survival strategy than shielding one'self from it.

6- The main differences from a nuclear bomb fallout to a reactor accident fallout is that there is less of an explosion in a reactor accident, and the effects will be mostly radiation. With a bomb, the explosive power and incendiary explosion will cause significant damage unrelated to that of the radiation. Another important difference is that the spread of fallout from a bomb has more of a chance to spread far than a reactor does, due to the mushroom cloud that is formed and moved by wind as it rains over thousands of acres. Of course, this is not always the case, as nuclear reactor fallout can spread by sea.



FREE EXAMPLES OF NUCLEAR FALLOUT IN ROOM A-7 [] [] http://www.atomicarchive.com/Docs/Ef...enw_chp2.shtml [] [] []