Self-Shielding and Power Share

  • Thread starter Syed Alam
  • Start date
  • Tags
    Power
In summary, self-shielding and power share are concepts in nuclear engineering that relate to a material's ability to absorb and transfer radiation. Self-shielding occurs when a material absorbs radiation and emits it in a different direction, while power share is the ability to transfer absorbed radiation to other materials. This is important in nuclear reactors to prevent overheating and damage. The effectiveness of self-shielding and power share depends on factors such as the type and energy of radiation, shielding material thickness and composition, and distance between the source and material. Scientists and engineers use simulations, experiments, and models to determine the best materials for these processes, considering factors such as cost, availability, and radiation resistance.
  • #1
23
1
1. What is "Resonance Self-shielding"?
2. What is the "self-shielding of the burnable poison"? How does it help burnable poison not to burnout quickly?
3. I have found that in a paper "POWER SHARE OF THE THORIUM CHAIN" and "The denaturing is necessary in some cases in order to reduce the power peaking in the seed-type fuel by improving the power share of the thorium
region at the beginning of fuel irradiation. " What is that Power Share? How is it helpful?
 
Engineering news on Phys.org
  • #2
Resonance shielding refers to the effect of increased neutron absorption in the resonance energy range, such that some fast neutrons do not slow to thermal energies, but are absorbed in the resonance energy range.

Self-shield by enrichment or burnable poisons means that the U-235 or burnable poison toward the interior pellet sees a lower neutron flux than the U-235 or burnable absorber near the surface.

Power sharing refers to power distribution such that peaking is controlled by allowing different regions of the core to produce power. Seed-type fuel is usually in the blanket region or in certain fuel assemblies. Ideally, one tries to reduce peaking in the core so that fuel does not exceed thermal or burnup limits.
 
  • Like
Likes Doug Huffman
  • #3


1. "Resonance self-shielding" refers to the phenomenon in which certain materials, such as fuel in a nuclear reactor, absorb more neutrons at particular energies than at others. This can lead to a decrease in reactivity and affect the overall performance of the reactor.

2. The "self-shielding of the burnable poison" refers to the ability of certain materials, known as burnable poisons, to absorb neutrons and reduce the reactivity of the fuel. This helps prevent the burnable poison from being consumed too quickly, allowing it to maintain its effectiveness over a longer period of time.

3. The "Power Share" in the context of the "POWER SHARE OF THE THORIUM CHAIN" refers to the distribution of power or energy production within a nuclear reactor. In this case, the paper is discussing how denaturing, or adding a small amount of a different material, can help balance the power distribution within the reactor by increasing the contribution of the thorium region. This can help improve the overall efficiency and stability of the reactor.
 

1. What is self-shielding and power share?

Self-shielding and power share is a concept in nuclear engineering that refers to the ability of a material to absorb and transfer radiation, either to protect itself or to share it with other materials.

2. How does self-shielding work?

Self-shielding occurs when a material absorbs radiation and then emits it in a different direction, reducing the amount of radiation that reaches the surrounding area.

3. What is power share and why is it important?

Power share is the ability of a material to transfer absorbed radiation to other materials, reducing the overall radiation exposure for all materials involved. This is important in nuclear reactors to prevent overheating and damage to materials.

4. What factors affect the effectiveness of self-shielding and power share?

The effectiveness of self-shielding and power share depends on the type of radiation, the energy of the radiation, the thickness and composition of the shielding material, and the distance between the radiation source and the material.

5. How do scientists and engineers determine the best materials for self-shielding and power share?

Scientists and engineers use computer simulations, experiments, and mathematical models to determine the best materials for self-shielding and power share. Factors such as cost, availability, and radiation resistance are also taken into consideration.

Suggested for: Self-Shielding and Power Share

Replies
1
Views
1K
Replies
0
Views
407
Replies
2
Views
2K
Replies
1
Views
1K
Replies
5
Views
915
Replies
15
Views
2K
Back
Top