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Which safety feature works to slow down nuclear fission chain reactions?
Wiki User
∙ 11y ago
Verified answer
control rods APEX USERS
Anonymous
What are the safety precautions for nuclear fission?
Rubber shoes are a must, whereas be sure not to wear fluorescent materials in the zone. Good luck.
What is the purpose of having redundancy and diversity in nuclear reactors?
The provision of component and safety redundancy and diversity in nuclear reactors is important to enhance safety of nuclear reactor operation.
What causes explosion in fission reaction?
A nuclear explosion is caused by the uncontrolled mass fission of a quantity of fissionable material, and the explosion is the sudden release of energy produce almost instantaneously due to the rapidity of a chain reaction in weapons grade uranium (this is an example, being the most common fissionable material used in nuclear explosives), which must be at least 95% U-235 (the same quality is required for naval nuclear reactors on board ships and submarines, which are used for supply power to be used to propel the ship).Nuclear explosions can also occur when a nuclear reactor is not properly maintained, or there is a meltdown (the structural failure of some critical component of the reactor leading to a breach of containment, and usually fires and complete structural failure).The only differences between a nuclear reactor and a nuclear bomb are the level of enrichment of the fissionable material (which there is no difference in if you are talking about a high-grade naval reactor), and the control rods and other safety features which are used to keep the reactor under control.The other type of nuclear detonation is the fusion device. This resembles fission, except energy is released upon the fusing of heavy water hydrogen molecules. The hydrogen (or h-bomb) uses nuclear fission as stated about to start the reaction. Most if not all fusion bomb are measured in the megaton (millions of tons) range. Currently only the United States and Russia have fusion bombs.
How can the fission be controlled or stopped in a nuclear reactor?
The nuclear chain reaction is controlled using neutron absorbing control rods containing boron, and in PWR's by also using soluble boron when necessary. Nuclear engineers use a term called reactivity, which just means the surplus of neutrons from one generation to another, and in steady operation this is zero. During the fission reactions fission products are produced, some of these are neutron absorbers like Xenon131, and their concentration changes with power changes, so that adjustments with the control rods are necessary following such changes. On start-up with new fuel for example it takes some hours before equilibrium xenon is reached, and if power has to be reduced the xenon rises again as a delayed action, so enough control to overcome the increased poisoning has to retained, or the reactor will shut itself down. The reactivity with new fuel loaded is higher than at the end of the fuel life, and this is where boric acid added to the reactor water circuit is useful. The reactor power (neutron flux level) is constantly monitored with instruments so that the control room staff know what is happening and can respond. In addition automatic safety circuits are triggered if there is an increase in flux beyond a certain point which the operators don't react to, and this inserts the control rods fully (scram or trip) which shuts the reactor down and holds it down. So there is no chance of a runaway.
What happens when you touch the nuclear plant what will happen to you?
Touching a nuclear plant will have no effect on you. You would have to go deep into the plant and bypass many safety precautions in order to be in any danger.
What would happen to a nuclear plant if the fission reaction goes critical or out of control?
There are emergency safety system that could be used to bring the nuclear plant again under control.
what is fission chain reaction how can it be controlled?
Fission chain reactions occur because of interactions between neutrons and fissile isotopes (such as 235U). The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes. When an atom undergoes nuclear fission, a few neutrons (the exact number depends on several factors) are ejected from the reaction. These free neutrons will then interact with the surrounding medium, and if more fissile fuel is present, some may be absorbed and cause more fissions. Thus, the cycle repeats to give a reaction that is self-sustaining. Nuclear power plants operate by precisely controlling the rate at which nuclear reactions occur, and that control is maintained through the use of several redundant layers of safety measures. Moreover, the materials in a nuclear reactor core and the uranium enrichment level make a nuclear explosion impossible, even if all safety measures failed. On the other hand, nuclear weapons are specifically engineered to produce a reaction that is so fast and intense it cannot be controlled after it has started. When properly designed, this uncontrolled reaction can lead to an explosive energy release
Information about nuclear power?
Nuclear power is power (generally electrical) produced from controlled (i.e., non-explosive) nuclear reactions. Commercial plants in use to date use nuclear fission reactions. Electric utility reactors heat water to produce steam, which is then used to generate electricity. In 2007, 14% of the world's electricity came from nuclear power, despite concerns about safety and radioactive waste management. More than 150 naval vessels using nuclear propulsion have been built.Nuclear fusion reactions are widely believed to be safer than fission and appear potentially viable, though technically quite difficult. Fusion power has been under intense theoretical and experimental investigation for many years.Both fission and fusion appear promising for some space propulsion applications in the mid- to distant-future, using low thrust for long durations to achieve high mission velocities. Radioactive decay has been used on a relatively small (few kW) scale, mostly to power space missions and experiments.
Why is nuclear energy illegal?
The danger arises from the very active fission products that are formed by fission of U235 and Pu 239. These are contained in the fuel, provided the zircaloy sheath is intact and leakproof, and reactor safety operational limits and procedures, as well as all the safety design features like secondary containment, are meant to keep them contained. The PWR and BWR have had very good safety records, and there is no need for concern, but it is essential to take safety seriously when running a nuclear plant.
What are the safety precautions for nuclear fission?
Rubber shoes are a must, whereas be sure not to wear fluorescent materials in the zone. Good luck.
Are Headrest safety feature or comfort feature?
It is a safety feature that prevents whiplash
Who is Carlito R Aleta?
Dr. Carlito Aleta was the former director and is the current consultant of the Philippine Nuclear Research Institute. His main contribution towards chemistry and science is his research into nuclear engineering. With a BSc in Chemical Engineering from the Central Colleges of the Philippines, Aleta has had a big influence on the studies of his subject. Nuclear engineering is an area of engineering that is based around the application of the breakdown, or fission, as well as the application of other sub-atomic physics and the fusion of atomic nuclei. Its studies are based on the principles of nuclear physics. Within the sub-field of nuclear fission, nuclear engineering focuses on the maintenance and interaction of systems and components. These may include nuclear power plants, nuclear weapons and nuclear reactors. The field of nuclear engineering also includes studies of medical and other applications of nuclear safety, radiation, nuclear fuel, heat and thermodynamics transport, other related technology (radioactive waste disposal) and the problems of nuclear proliferation. The nuclear branch of engineering is often broken down into four main professional areas. These areas are nuclear fission, nuclear medicine and medical physics, nuclear materials and nuclear fuel, and radiation measurements and dosimetry. Nuclear fission studies deal with the disintegration of an atom's nucleus into two separate, smaller elements. Common types include thermal fission, fast fission and spontaneous fission. Within medical physics there are a number of ways nuclear engineering plays an important role. Nuclear medicine, radiation therapy and x-ray machines are all closely related to the subject. Nuclear materials and nuclear fuels are used to obtain an increased efficiency and safety in nuclear plants. Nuclear engineers are keen to develop the radiation measurements that are available to improve imaging technologies. Dr. Carlito Aleta is part of the ever developing and experimenting branch of engineering that is nuclear engineering. His contributions are important for the understanding of the topic.
Who is carlito aleta?
Dr. Carlito Aleta was the former director and is the current consultant of the Philippine Nuclear Research Institute. His main contribution towards chemistry and science is his research into nuclear engineering. With a BSc in Chemical Engineering from the Central Colleges of the Philippines, Aleta has had a big influence on the studies of his subject. Nuclear engineering is an area of engineering that is based around the application of the breakdown, or fission, as well as the application of other sub-atomic physics and the fusion of atomic nuclei. Its studies are based on the principles of nuclear physics. Within the sub-field of nuclear fission, nuclear engineering focuses on the maintenance and interaction of systems and components. These may include nuclear power plants, nuclear weapons and nuclear reactors. The field of nuclear engineering also includes studies of medical and other applications of nuclear safety, radiation, nuclear fuel, heat and thermodynamics transport, other related technology (radioactive waste disposal) and the problems of nuclear proliferation. The nuclear branch of engineering is often broken down into four main professional areas. These areas are nuclear fission, nuclear medicine and medical physics, nuclear materials and nuclear fuel, and radiation measurements and dosimetry. Nuclear fission studies deal with the disintegration of an atom's nucleus into two separate, smaller elements. Common types include thermal fission, fast fission and spontaneous fission. Within medical physics there are a number of ways nuclear engineering plays an important role. Nuclear medicine, radiation therapy and x-ray machines are all closely related to the subject. Nuclear materials and nuclear fuels are used to obtain an increased efficiency and safety in nuclear plants. Nuclear engineers are keen to develop the radiation measurements that are available to improve imaging technologies. Dr. Carlito Aleta is part of the ever developing and experimenting branch of engineering that is nuclear engineering. His contributions are important for the understanding of the topic.
How is nuclear energy is useful?
NUCLEAR DEBATE 1)Proponents of nuclear energy assert that nuclear power is a compact, reliable sustainable energy source that reduces carbon emissions and increases energy security. Proponents highlight that nuclear energy's operational safety record is already very good when compared to other major power plant technologies. They claim that the risks of waste and other environmental impacts are small compared to other sources of electricity and can be further reduced by improved technology in new reactors. 2)Mainly to produce electricity. Also to produce radio-isotopes for medical and industrial use 3)The two "basic types" of nuclear energy are based on fission and fussion. Fission is basically atom splitting. Fusion is the forcing together of nuclei and causing them to fuse, to stick together, and to form a new nucleus. In both nuclear reactions, a lot of heat is generated. The reactions can be set up to occur "really fast" and release energy all at one. This the idea behind the nuclear weapons. There is another idea. Because the primary useful energy released in nuclear reactions is heat, that heat can be captured to do useful work. At present, we can't do any "controlled fusion" and capture heat to generate electric power. But we can use fission to our advantage to make heat to boil water to generate steam to turn a turbine to turn a generator and make electricity. And we do this pretty well.
What is the contribution of carlito aleta?
Dr. Carlito Aleta was the former director and is the current consultant of the Philippine Nuclear Research Institute. His main contribution towards chemistry and science is his research into nuclear engineering. With a BSc in Chemical Engineering from the Central Colleges of the Philippines, Aleta has had a big influence on the studies of his subject. Nuclear engineering is an area of engineering that is based around the application of the breakdown, or fission, as well as the application of other sub-atomic physics and the fusion of atomic nuclei. Its studies are based on the principles of nuclear physics. Within the sub-field of nuclear fission, nuclear engineering focuses on the maintenance and interaction of systems and components. These may include nuclear power plants, nuclear weapons and nuclear reactors. The field of nuclear engineering also includes studies of medical and other applications of nuclear safety, radiation, nuclear fuel, heat and thermodynamics transport, other related technology (radioactive waste disposal) and the problems of nuclear proliferation. The nuclear branch of engineering is often broken down into four main professional areas. These areas are nuclear fission, nuclear medicine and medical physics, nuclear materials and nuclear fuel, and radiation measurements and dosimetry. Nuclear fission studies deal with the disintegration of an atom's nucleus into two separate, smaller elements. Common types include thermal fission, fast fission and spontaneous fission. Within medical physics there are a number of ways nuclear engineering plays an important role. Nuclear medicine, radiation therapy and x-ray machines are all closely related to the subject. Nuclear materials and nuclear fuels are used to obtain an increased efficiency and safety in nuclear plants. Nuclear engineers are keen to develop the radiation measurements that are available to improve imaging technologies. Dr. Carlito Aleta is part of the ever developing and experimenting branch of engineering that is nuclear engineering. His contributions are important for the understanding of the topic. by: Eunice V. Patricio add me on facebook: eunice13_patricio@yahoo.com
When was Canadian Nuclear Safety Commission created?
Canadian Nuclear Safety Commission was created in 2000.
What is the best safety feature in a car?
A competent driver is the best safety feature in any vehicle.
