Cadmium rods are used in a nuclear reactor fora)absorbing neutronsb)speeding up slow neutronsc)regulating the power level of the reactor.d)slowing down fast neutronsCorrect answer is option 'A'. Can you explain this answer?

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Cadmium and boron rod both are used in cotroling the reactivity of uranium means slow down the rate of fission...

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Cadium rod is used to control the fission rate of uranium

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(A) absorbing neutrons

solution: Control rods are used in nuclear reactors to control the fission rate of uranium and plutonium.They are composed of chemical elements such as boron, silver, indium and cadmiumthat are capable of absorbing many neutrons without themselves fissioning.

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CD rods are good absorber so they use to absorb the neutrons.

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In nuclear reactors, fission of uranium is carried out by bombarding a slow moving neutron on uranium which results in emission of 3 more neutrons along with the byproducts So, cadmium rods are used to absorb extra neutrons in order to achieve controlled chain reaction.

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Introduction:
In a nuclear reactor, cadmium rods are used for absorbing neutrons. This is an important function in controlling the nuclear reaction and regulating the power level of the reactor. In this response, we will explore the reasons why cadmium rods are used for neutron absorption in a nuclear reactor.

Neutron Absorption:
Neutrons play a crucial role in the functioning of a nuclear reactor. They are responsible for initiating and sustaining the nuclear fission chain reaction. However, in order to properly control the reaction and prevent it from going out of control, it is necessary to absorb some of the neutrons.

Nuclear Reactor Control:
The control of a nuclear reactor involves maintaining a balance between neutron production and neutron absorption. This ensures that the reactor operates at a safe and stable power level. Cadmium rods are one of the methods used to control neutron absorption in a nuclear reactor.

Cadmium as a Neutron Absorber:
Cadmium is a good neutron absorber due to its high neutron capture cross-section. This means that it has a high likelihood of absorbing neutrons when they come into contact with it. By inserting cadmium rods into the reactor, the neutron flux can be reduced, effectively absorbing some of the neutrons and reducing their number.

Control Rods:
Cadmium rods are typically used as control rods in a nuclear reactor. These rods are made of a cadmium alloy and can be inserted or withdrawn from the reactor core to adjust the neutron flux. By inserting the cadmium rods deeper into the core, more neutrons are absorbed, reducing the power level of the reactor. Conversely, by withdrawing the rods, more neutrons are allowed to interact with the fuel, increasing the power level.

Conclusion:
In conclusion, cadmium rods are used in a nuclear reactor for absorbing neutrons. They are an essential part of the control mechanism that regulates the power level of the reactor. By adjusting the position of the cadmium rods, the neutron flux can be controlled, ensuring safe and stable operation of the reactor.

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