A neutron hits the nucleus of the radioactive element (e.g. Uranium) The Tsar Bomba (a soviet device) was the largest nuclear weapon ever detonated . This is an example of what the result of an uncontrolled Nuclear Chain Reaction can cause.
What is the uncontrolled chain reaction?
An uncontrolled chain reaction is a chain of nuclear reactions that take place subsequently, but not under controlled conditions . Therefore, an uncontrolled chain reaction can become highly explosive. That is because these reactions can release a very high amount of energy at a time.
What is an example of uncontrolled fission reaction?
Fission reactions on the other hand is the type used in nuclear power plants and can be controlled. Atomic bombs and hydrogen bombs are examples of uncontrolled nuclear reactions.
What is an uncontrolled fission reaction?
In uncontrolled nuclear fission, one fission reaction starts a chain reaction, in which neutrons produced in one reaction cause other reactions , which cause more reactions, and so on. Energy released by nuclear fission is used to produce electrical energy in nuclear power plants.
What is an example of a chain reaction?
chain reaction, self-sustaining reaction that, once started, continues without further outside influence. ... A line of dominoes falling after the first one has been pushed is an example of a mechanical chain reaction; a pile of wood burning after it has been kindled is an example of a chemical chain reaction.
How are chain reactions controlled?
The chain reaction is controlled by Boron control rods . ... When the Boron absorbs the neutrons then the chain reaction will slow down due to lack of neutrons producing reactions. In times of high energy demand, control rods are raised allowing more reactions to take place.
What is controlled uncontrolled reaction?
(1)A controlled chain reaction is a chain of nuclear reactions that take place subsequently under controlled conditions . An uncontrolled chain reaction is a chain of nuclear reactions that take place subsequently, but not under controlled conditions. ... Uncontrolled chain reactions are used in nuclear bombs.
How can a chain reaction be controlled quizlet?
- Chain Reaction controlled by. Materials that absorb or capture neutrons are used in the reactor.
- Control Rods. ...
- Control Rods made of. ...
- Withdrawing the Control Rods. ...
- If negative reactivity in the core decreases. ...
- Inserting the Control Rods. ...
- Boron. ...
- Boron.
What is critical mass?
What Is Critical Mass? Critical mass is the point at which a growing company becomes self-sustaining and no longer needs additional investment to remain economically viable .
How is nuclear fusion controlled?
The idea behind controlled fusion is to use magnetic fields to confine a high-temperature plasma of deuterium and tritium . ... The nuclei in the plasma undergo fusion reactions that convert some of their rest mass into energy – in the same way that energy is produced by the Sun.
How can fission reactions be controlled?
To maintain a sustained controlled nuclear reaction, for every 2 or 3 neutrons released, only one must be allowed to strike another uranium nucleus . If this ratio is less than one then the reaction will die out; if it is greater than one it will grow uncontrolled (an atomic explosion).
Is nuclear fusion is difficult to control?
Because fusion requires such extreme conditions, “if something goes wrong, then it stops. No heat lingers after the fact.” With fission, uranium is split apart, so the atoms are radioactive and generate heat, even when the fission ends. Despite its many benefits, however, fusion power is an arduous source to achieve.
What is chain reaction in chemistry?
Chain reaction, in chemistry and physics, process yielding products that initiate further processes of the same kind, a self-sustaining sequence . ... So-called branching chain reactions are a form of chain reaction in which the number of chain carriers increases in each propagation.
What are the different types of chain reaction?
Chain reactions can be addressed into two categories: first, controlled (like a nuclear power plant) and uncontrolled (an atomic bomb) . Both are motivated by fission reactions, which are elaborated in this section.
How do you use chain reaction in a sentence?
1. The powder immediately ignited and set off a chain reaction of explosions. 2. The Government fear the strike may produce a chain reaction in other industries.
What is another word for chain reaction?
| domino effect knock-on effect | train of events chemical reaction | vicious circle causal nexus | series of events cause and effect | chain of circumstances concatenation of events |
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