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Regional Basic Professional Training Course in Korea

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❙ 339 ❙<br />

5. SITING CONSIDERATIONS<br />

future plant must be evaluated. There must therefore be a survey of the risks of impacts<br />

by projectiles, explosions, fire, and emissions of toxic gases so that the plant can be<br />

designed correctly. Mention must be made of any aggravation of the risks, carefully<br />

evaluated for modification projects.<br />

5.4.2. Sources of risk<br />

Most of the human activities likely to create constra<strong>in</strong>ts for the environment considered<br />

here come from <strong>in</strong>dustry, research, and means of transport. The sources of risk may be<br />

fixed, like the production and storage of hazardous materials, or mobile, such as the<br />

transport of these same materials, or flights by aircraft.<br />

The effects of an accidental aggression from the environment may be:<br />

Projectile impact;<br />

Pressure wave generated by one or more explosions;<br />

Fire;<br />

Corrosive toxic gases, smoke, dust.<br />

5.4.2.1. Missile impact:<br />

Except for missiles created by the explosion of rotat<strong>in</strong>g mach<strong>in</strong>es (break‐up of a turbo‐<br />

alternator), the ma<strong>in</strong> risk is connected with an aircraft crash on the plant.<br />

5.4.2.2. Explosions<br />

The explosion risk arises from substances created by the chemical <strong>in</strong>dustry, explosive to<br />

various degrees (dynamite, nitrate‐based fertilizers, etc.), or, most often, from

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