A fraction of a second after a nuclear explosion, the heat from the fireball causes a high-pressure wave to develop and move outward producing the blast effect. The front of the blast wave, i. The air immediately behind the shock front is accelerated to high velocities and creates a powerful wind.
A dirty bomb, or radiological dispersion device, is a bomb that uses conventional explosives such as dynamite to spread radioactive materials in the form of powder or pellets. It does not involve the splitting of atoms to produce the tremendous force and destruction of a nuclear blast, but rather spreads smaller amounts radioactive material into the surrounding area. The main purpose of a dirty bomb is to frighten people and contaminate buildings or land with radioactive material.
While a serious event such as a plane crash into a nuclear power plant could result in a release of radioactive material into the air, a nuclear power plant would not explode like a nuclear weapon. There may be a radiation danger in the surrounding areas, depending on the type of incident, the amount of radiation released, and the current weather patterns.
However, radiation would be monitored to determine the potential danger, and people in the local area would be evacuated or advised on how to protect themselves. Local emergency management officials will tell people when to take KI.
If a nuclear incident occurs, officials will have to find out which radioactive substances are present before recommending that people take KI. If radioactive iodine is not present, then taking KI will not protect people.
Taking KI will not protect people from other radioactive substances that may be present along with the radioactive iodine. Skip directly to site content Skip directly to page options Skip directly to A-Z link.
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Following are some steps recommended by the World Health Organization if a nuclear blast occurs: If you are near the blast when it occurs: Turn away and close and cover your eyes to prevent damage to your sight. Drop to the ground face down and place your hands under your body.
Remain flat until the heat and two shock waves have passed. For you. World globe An icon of the world globe, indicating different international options. Get the Insider App. Click here to learn more. A leading-edge research firm focused on digital transformation. Good Subscriber Account active since Shortcuts. Account icon An icon in the shape of a person's head and shoulders. It often indicates a user profile. Log out. US Markets Loading H M S In the news.
Aria Bendix. Simulations show how each of the cities would be affected by a kiloton blast — the kind detonated over Hiroshima. New York City would have the most fatalities. Let's just say, in the case of a nuclear blast, you would want to be wearing white. First, let's get this out of the way - there is no clear-cut impact of a single nuclear bomb, because it depends on a whole lot of things, including the weather on the day it's dropped, the time of day it's detonated, the geographical layout of where it hits, and whether it explodes on the ground or in the air.
As the video above explains , approximately 35 percent of the energy of a nuclear blast is released in the form of thermal radiation. And seeing as thermal radiation travels at approximately the speed of light, the first thing that will hit you is a flash of blinding light and heat. The light itself is enough to cause something called flash blindness - a temporary form of blindness that can last a few minutes.
The AsapSCIENCE video considers a 1 megaton bomb, which is 80 times larger than the bomb detonated over Hiroshima, but much smaller than many modern nuclear weapons more on that later.
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