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Regional Basic Professional Training Course in Korea

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<strong>Regional</strong> <strong>Basic</strong> <strong>Professional</strong> <strong>Tra<strong>in</strong><strong>in</strong>g</strong> <strong>Course</strong> (BPTC) on Nuclear Safety<br />

The <strong>in</strong>tensity of ra<strong>in</strong> (or <strong>in</strong>dication of no ra<strong>in</strong>);<br />

An <strong>in</strong>dicator of the atmospheric turbulence, generally <strong>in</strong> the form of "stability class",<br />

such as the classical Pasquill-Gifford classes from A (unstable) to F (very stable).<br />

Different techniques of sampl<strong>in</strong>g of these data, for the release sequences, are currently used:<br />

Each hourly condition can be the start<strong>in</strong>g po<strong>in</strong>t of the release;<br />

Random sampl<strong>in</strong>g of the start<strong>in</strong>g po<strong>in</strong>t of the release;<br />

Cyclic sampl<strong>in</strong>g (with a chosen time <strong>in</strong>terval);<br />

Stratified sampl<strong>in</strong>g, where the meteorological sequences are grouped <strong>in</strong>to a limited<br />

number of categories (less time consum<strong>in</strong>g technique).<br />

9.5.5. Exposure pathways and dose assessment<br />

The ma<strong>in</strong> exposure pathways, dur<strong>in</strong>g and after the atmospheric dispersion, are:<br />

External exposure from the pass<strong>in</strong>g puffs (or the pass<strong>in</strong>g plume);<br />

External exposure from the deposited material on the ground;<br />

Internal exposure by <strong>in</strong>halation dur<strong>in</strong>g the passage of the puffs (generally<br />

committed doses to various organs and effective dose);<br />

Internal exposure by <strong>in</strong>gestion of contam<strong>in</strong>ated foodstuffs by dry and wet<br />

deposition (generally committed doses to various organs and effective dose), firstly<br />

by direct contam<strong>in</strong>ation and after by root uptake<br />

For each pathway, dose coefficients (or dose conversion factors) published by national<br />

<strong>in</strong>stitutes or by <strong>in</strong>ternational organizations (like ICRP or IAEA) that allow conversion, for<br />

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