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Radioactive Wastes - Research Paper

Radioactive Wastes


, must for the protection of mankind be stored or
disposed in such a manner that isolation from the biosphere is assured
until they have decayed to innocuous levels. If this is not done, the world
could face severe physical problems to living species living on this planet.
Some atoms can disintegrate spontaneously. As they do, they emit
ionizing radiation. Atoms having this property are called radioactive. By
far the greatest number of uses for radioactivity in Canada relate not to
the fission, but to the decay of radioactive materials - radioisotopes.
These are unstable atoms that emit energy for a period of time that varies
with the isotope. During this active period, while the ...

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carried out with the same equipment: evaporation of the
waste solution mixed with the

1) borosilicate: any of several salts derived from both boric acid and
silicic acid and found in certain minerals such as tourmaline.

additives necesary for the production of borosilicate glass, calcination
and elaboration of the glass. These operations are carried out in a
metallic pot that is heated in an induction furnace. The vitrification of
one load of wastes comprises of the following stages. The first step is
'Feeding'. In this step the vitrification receives a constant flow of
mixture of wastes and of additives until it is 80% full of calcine. The
feeding rate and heating power are adjusted so that an aqueous phase of
several litres is permanently maintained at the surface of the pot. The
second step is the 'Calcination and glass evaporation'. In this step when
the pot is practically full of calcine, the temperature is progressively
increased up to 1100 to 1500 C and then is maintained ...

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ventilators provide air circulation to cool down glass.
The glass produced has the advantage of being stored as solid rather
than liquid. The advantages of the solids are that they have almost
complete insolubility, chemical inertias, absence of volatile products and
good radiation resistance. The ruthenium that escapes is absorbed by a
filter. The amount of ruthenium likely to be released into the environment
is minimal.
Another method that is being used today to get rid of radioactive
waste is the 'placement and self processing radioactive wastes in deep
underground cavities'. This is the disposing of toxic wastes by
incorporating them into molten silicate rock, with low ...

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"Radioactive Wastes." Essayworld.com. July 11, 2007. Accessed December 23, 2024. http://www.essayworld.com/essays/Radioactive-Wastes/67839.
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PAPER DETAILS
Added: 7/11/2007 07:50:08 AM
Category: Miscellaneous
Type: Premium Paper
Words: 1825
Pages: 7

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