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Friday, October 24, 2014

Radiation Pollution

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Nuclear Power Plants, transport and disposal of nuclear wastes, mining of radioactive substances, fall out of bomb explosions, nuclear weapons, testing of nuclear devices and nuclear accidents etc. are major sources of radiation pollution. These sources cause permanent damages to life and property. A nuclear reactor accident took place in 1986 in Chernobyl, Ukraine which killed at least 31 people and forced more than 200,000 people to vacate and relocate.

Radiation pollution may be both – Natural and Man- made. Cosmic radiations, ultra violet radiations etc. are examples of Natural Radiations. The application of explosive devices, testing of bombs, leakage from nuclear reactors etc. are manmade sources of radiation pollution.

Radio active substances emit rays like alpha (α) rays, gamma (¥) rays and beta (β) rays. These rays are emitted from unstable radioactive substances so as to become stable. In this way these are gradually reduced in their value. The time taken by a radioactive substance to get reduced up to the half of its initial value is called as half life period. The unit applied to express the decay of a radioactive substance is called as Becquerel.

Key Words:nuclear power, transport, Chernobyl, rays

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