5.5- Nuclear hazards and human health risks
What is Nuclear Energy?
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Harmful Effects Of
Radiation
Radiation
Harmful Effects of
Radiation
Hair
Heart and Brain
Thyroid
Blood System
Reproductive Tract
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What is Nuclear Hazard ?
Harmful Effects Of
Radiation
Radiation
Radiation can be defined as the transmission or emission of energy in
the form of particles or waves through a material medium or space. This
includes:
·
Electromagnetic radiation such as radio waves,
heat, x rays, gamma radiation and even visible light.
·
Particle radiation such as alpha radiation,
neutron radiation, and beta radiation
·
Acoustic radiation such as seismic waves,
sound, and ultrasound
·
Gravitational radiation
Radiation can be categorized into non-ionizing or ionizing depending on
the radiated particle’s energy. Radioactive materials that emit α, β, or γ
radiation are the common sources of ionizing radiation. Visible light,
microwaves, infrared light, are the common sources of nonionizing radiation.
Both types of radiation are harmful to health even though they have few
advantages.
Harmful Effects of
Radiation
Radiation exposure can have different effects depending on the dose
received. A key factor in determining the health effects is whether it is
chronic or acute. When a dose of radiation is received at once, then it can be
called an acute exposure, and when a small dose of radiation is exposed for a
long period then it is chronic exposure.
Health effects of radiation can be classified into two categories: threshold effectsand non-threshold effects. Threshold
effects appear after a certain level of radiation exposure is reached and
enough cells have been damaged to make the effect apparent. Non-threshold
effects can occur at lower levels of radiation exposure. Here are few
common health effects or harmful effects of radiation on human body.
Hair
Loss of hair fall occurs when exposure to radiation is higher than 200
rems.
Heart and Brain
Intense exposure to radiation at 1000 to 5000 rems will affect the
functioning of the heart. Radiation kills nerve cells and small blood vessels
of heart which may cause immediate death. Brain cells are affected if the
radiation exposure is greater than 5000 rems.
Thyroid
Certain
body parts are affected specifically when exposed to different types of
radiation sources. The thyroid gland may be affected when exposed to
radioactive iodine. If exposed to a considerable amount of
radioactive iodine, whole or part of thyroid can be affected.
Blood System
A number of lymphocytic cells present in the blood will be reduced if a
person is exposed to 100 rems. This may cause several immune problems. This is
termed as mild radiation sickness. As per the reports from Nagasaki and
Hiroshima, symptoms may be present more than ten years from that exposure.
Reproductive Tract
As the cells of reproductive tract divide fastly, these are more prone
to be affected even if the exposure is not more than 200 rems.
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