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What would happen if the base of a containment vessel were made out of the same material as the control rods during a nuclear meltdown?
Making the base of a reactor vessel out of a neutron absorbing material like the control rods are made out of (like boron) would have little effect on a meltdown. The primary source of heat in a meltdown is the radioactive decay of fission fragments. This decay heat cannot be stopped by anything. It can only be carried away by a coolant of some kind. If a meltdown is severe, the molten fuel and cladding will pool on the bottom of the reactor vessel and melt through it. This will be true in a gross meltdown regardless of the material from which the reactor vessel bottom is made.
What do GM counters detect?
A Geiger-Müller (GM) counter is used to detect ionizing radiation, specifically from various nuclear decay processes like beta decay, gamma decay, and sometimes alpha decay.
What is ohmic decay?
Ohmic decay is the wasting away of dipolar magnetic fields. This decaying takes place over a very long period of time.
What is the best font size to use om a leaflet about tooth decay?
the best font is 15
What is the cost of a nuclear reactor?
The cost of a nuclear reactor is nuclear waste witch is produced by The reaction in a nuclear reactor happens because neutrons hit the nuclei of atoms, which can divide, producing energy, new atoms, and more neutrons. When a neutron hits the nucleus of an atom, four different things can happen. In the case of most collisions with the nuclei of non-radioactive atoms and some radioactive atoms, the neutron imparts some of its energy to the atom and bounces off. In some cases the neutron is trapped in the nucleus, changing the atom from its isotope to the next heavier isotope. This usually means the atom becomes less stable and will quickly decay or undergo fission. In some cases the neutron simply causes the atom to decay. In some cases the neutron causes the atom to undergo fission. When an atom decays it loses mass and nearly always changes to a different element. Sometimes it emits an alpha particle and in so doing it drops 2 in atomic number and 4 in isotope. An example is when uranium-238 (atomic number 92) becomes Thorium-234 (atomic number 90) Sometimes it emits a beta particle, and when this happens its atomic number increases by one, but the isotope number stays the same. An example is when thorium-234 (atomic number 90) becomes protactinium 234 (atomic number 91). The decay of an atom is a long, multi-stepped process that ultimately ends with a radiologically inert isotope, such as lead-208. Fission happens when the atom, such as uranium-235, is divided into two daughter atoms with a combined mass somewhat less than the original. This process is rather unpredictable as to what atoms are produced, but they are typically radioactive. An example is uranium-235 dividing to produce barium-141 and krypton-92 (notice these atomic numbers add to 233, slightly less than the uranium's number). The by products of fission are all waste, as are the atoms they decay into. Nuclear waste is short lived, which usually decays in a spent fuel pool; medium lived, which usually decays in a couple hundred years; or long lived, which can last for millions of years. All of it remains dangerous as long as it is appreciably radioactive.
When should decay heat be removed from the reactor core to prevent fuel damage?
Decay heat should be removed from the reactor core as soon as possible after the reactor is shut down to prevent fuel damage. If the heat is not removed, it can cause the fuel to overheat and potentially result in damage to the fuel rods, leading to a meltdown. Cooling systems such as circulating water or coolant are used to remove the decay heat from the reactor core.
Why is fuel when it is removed from the reactor left to cool before being handled further?
They call it "cooling" but it is not thermal cooling it is radiological "cooling" by decay of highly radioactive short half life isotopes. This reduces the radioactivity of the spent fuel and makes it easier to handle and process.
Where are most of the nuclear waste and spent fuel rods currently?
Spent fuel from a reactor is stored under water in a concrete and steel pool to cool and shield it for at least ten years after it is removed from the reactor. After this time, it has decayed sufficiently and heat production is low enough such that it can be removed from the water and decay in the air. It is still shielded to prevent exposing people near it and it is kept under lock and key at the power plant or storage facility to maintain control.
How can I prevent wood to ground contact to avoid potential damage or decay?
To prevent damage or decay, avoid direct contact between wood and the ground by using barriers like concrete footings, gravel, or pressure-treated lumber. These barriers can help protect the wood from moisture, insects, and decay-causing organisms. Regularly inspect and maintain these barriers to ensure they remain effective in preventing wood-to-ground contact.
Why do teeth die Is it from not brushing teeth or just from trauma?
When there is nerve damage that isn't from trauma, it is associated with a bacterial infection. Most often this is associated with a large area of decay that approaches or reaches the pulp chamber which houses nerve tissue. Brushing plays an important preventative role in keeping this from happing. If the decay reaches the dentin, which is the layer under the outer white enamel, it is time to have the decay removed and a filling placed to prevent the tooth from dying.
What does xenon 135 decay into?
Xenon-135 decay to caesium-135 by beta emission.
What do you do to prevent decay?
Brush your teeth!
Severe overheating of a nuclear reactor core?
The ultimate would be to cause melting of the fuel. It must be shown (theoretically) that this would be contained in the bottom of the reactor vessel. The fission chain reaction would have stopped but there is after heat from radioactive decay and this must be absorbed by emergency cooling to avoid damage to the vessel. This is an extreme case and might be caused by a severe loss of cooling accident, but is very unlikely in most reactors.
Substance to prevent tooth decay?
Flouride
How does toothpaste prevent tooth decay?
which element present in our toothpaste protects out tooth from the tooth decay?
Why is it sometimes necessary to prevent decay?
It is necessary to prevent tooth decay so that you can keep healthy teeth without getting toothaches, root canals, and/or dentures.
What happens if a nuclear reactor is not cooled?
A nuclear reactor generates heat by controlled nuclear fission. Primary coolant carries this heat away to make steam. If a reactor is not cooled, it will overheat. Even if it is shut down immediately, the radioactive fragments of fission in the core will still be undergoing radioactive decay. This will continue to generate a lot of what we call decay heat. This heat can be sufficient to melt the metal that forms the fuel elements if cooling is not maintained, and the result is a nuclear meltdown with various consequences.
