0
Nuclear fission chain reactions do not naturally occur for a couple of reasons. One reason is that uranium-235 atoms are not found in large concentrations. Engineers counteract this with what process?
Wiki User
∙ 6y ago
Verified answer
Enrichment.
apex.
math
Wiki User
∙ 6y agoNuclear fission takes place when a large, somewhat unstable isotope (atoms with the same number of protons but different number of neutrons) is bombarded by high-speed particles, usually neutrons. These neutrons are accelerated and then slammed into the unstable isotope, causing it to fission, or break into smaller particles. During the process, a neutron is accelerated and strikes the target nucleus, which in the majority of nuclear power reactors today is Uranium-235. This splits the target nucleus and breaks it down into two smaller isotopes (the fission products), three high-speed neutrons, and a large amount of energy in a process called acceleration.
This produces a chain reaction that must be controlled or it will 'run away' causing a major disaster. The reaction is usually controlled by control rods, which are made of a neutron absorbing material, are placed into the core and are literally raised and lowered to tweak the reaction - if you need to generate more heat, you raise the rods out of the core to let more neutrons split more atoms. To curb the reaction, you lower the rods into the core to absorb more of the neutrons before they have a chance to come in contact with the uranium. In emergency cases (like recently in Japan), the rods are automatically shoved into the core using gravity, hydraulics or a mechanical spring, causing the chain reaction to stop. This is called "SCRAMing" the reactor.~ Wondered
Anonymous
Anonymous
chickenfingers
chickenfingers
kantrelate kris
Colin Osborn
Enrichment APEX
Anonymous
Enrichment
Do nuclear materials occur naturally?
Yes, that is where we get the nuclear material for our reactors, by mining it from the Earth. Though it does not occur in high concentrations, we have to concentrate it ourselves.
In what three ways can water be found naturally on earth?
Fresh water is naturally occurring water on the Earth's surface with low concentrations of dissolved salts and solids. Fresh water can be found in ponds, icebergs, rivers, and groundwater aquifers.
Are there other elements found in stars than hydrogen and helium?
Yes. All naturally occurring elements in the universe can be found in most stars, though generally only in small concentrations. Massive stars that have depleted the hydrogen in their cores may start producing elements as heavy as iron.
Which polysaccharide is found in connective tissues?
Hyaluronic Acid is a polysaccharide and a compound that occurs naturally in every tissue of the body, with the highest concentrations occurring in tissues such as skin, cartilage and eyes.It provides protection to cell structures and is the natural gel between skin cells that serves as a water reservoir for the cells.
Are girls naturally lesbian?
Only Lesbian girls are naturally lesbian. Straight girls are naturally straight.
Is silver naturally formed?
Yes , it is an element. It is formed naturally and found in various concentrations ranging from pure"veins" to ore's laden with differing concentrations.
What do you used emetic for?
Emetics make one vomit. Naturally, antiemetics counteract nausea and help to prevent vomiting.
How ozone concentrations naturally vary in well-understood patterns?
Ozone is generally spread throughout. It can vary with pressure, temperature and altitudes.
Do nuclear materials occur naturally?
Yes, that is where we get the nuclear material for our reactors, by mining it from the Earth. Though it does not occur in high concentrations, we have to concentrate it ourselves.
Is heat transfer the same as gravity?
No, heart transfer has to do with conduction, convection, and radiation. In all of these actions energy is moving from higher concentrations to lower concentrations. Gravity is just a naturally occurring force in nature... It's origins are to be answered in another question.
Is francium synthetic?
1. Francium exist naturally, but in infinitesimally concentrations, in uranium ores. 2. Francium can be obtained also artificially, by nuclear reactions.
What is different about all the elements listed after uranium?
All are radioactive, artificial elements (but note that Np and Pu can exist also naturally in extremely low concentrations).
Is radon gas testing as important as they say?
Radon is a naturally occurring gas which in high concentrations can be extremely hazardous. So it it better to do the testing if you suspect the presence.
Do greenhouse gases occur naturally in the air?
Yes. Most of the greenhouse gases do occur naturally, particularly carbon dioxide (CO2). By maintaining the temperature that we enjoy today, these gases are essential to life on earth as we know it, as long as the concentrations of the gases do not rise or fall appreciably. In the absence of human activity the concentrations of greenhouse gases remain more or less constant over time, so that there is no effect on global warming. However, when human activity results in even a small increment in the concentrations of greenhouse gases, we begin to get global warming and climate change.
How can additional gases can be added to the air?
Additional gases can be added to the air by releasing them from their current container or confinement. Gases will naturally mix together in various concentrations depending on their composition.
Is neon synthetic?
Neon is a naturally-occurring chemical element, although it is not present in high concentrations in the earth's atmosphere.. Neon is an element, so it cannot be synthesized; it can only be extracted from natural sources.
In what three ways can water be found naturally on earth?
Fresh water is naturally occurring water on the Earth's surface with low concentrations of dissolved salts and solids. Fresh water can be found in ponds, icebergs, rivers, and groundwater aquifers.
