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State the types of radioactive waste generated in a nuclear power station. Explain the methods employed for their disposal.

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Types of radioactive waste: The waste produced in nuclear power plant is in the form of solid, liquid & gases,

1. Solid Waste Disposal:-  Solid wastes removed from the reactor are very hot and radioactive. Solid waste is filled in a sealed container. And is kept under water for 5 to 10 years under supervision to reduces its temperature. The solid waste container is buried deeply in the ground by making tunnel, however the area must be unused land, away from populated area and there is less rain fall in that area. 

OR 

Solid waste is filled in a sealed container and is disposed off away from sea shore. o 

OR 

Many times old and unused coal mines, salt mines, can be used for waste disposal


2. Liquid Waste Disposal:-  The liquid waste is diluted to a sufficient level by adding large quantity of water. The liquid waste after analysis (concentration of radioactive material are measured.) is sealed in a container. Then it is disposal off into the sea several kilometers away from sea shore.


3. Gaseous Waste Disposal:-  Gaseous wastes are generally diluted with adding air. And passed through high efficiency filter. Then passed through radiation monitoring system. In this system concentration of radioactive material are measured. If it is safe then released to atmosphere at high level through large height chimney.

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