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| General-I |
- The Radiation encountered with nuclear reactors can be classified, as
- Charge particles (α, β, fission fragments).
- Electromagnetic Radiation (X-ray, γ-ray).
- Neutrons.
- As the charge particles are mostly absorbed in reactor, they do not pose a direct health threat.
- However, when fission products are discharged due to any accidental release, they will have an influence.
- As we have studied neutron interactions in detail, it will be skipped.
- X-rays and γ-rays have long range and hence can have an influence on the health of operating personnel.
- Hence shielding is required to protect the plant personnel.
- Similarly, neutrons can leak out and hence have to be taken care of.
- Standards have been evolved for the protection of plant personnel and general public and these will be discussed subsequently.
- Prior to understanding the health effects, let us look at how radiation interacts with matter.
- First we shall look at interaction of electromagnetic radiation.
- γ-rays are emitted when nucleus de-excites from an excited state.
- On the other hand, X-rays are emitted when electrons move from one shell to another.
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