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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 on‐site emergency response organization must have access to sufficient <strong>in</strong>formation<br />

about the event to assess the need for activation of off‐site emergency plans. Local, state,<br />

and national regulatory and emergency organizations will also require <strong>in</strong>formation, and<br />

appropriate communications arrangements must be <strong>in</strong> the emergency plan.<br />

3.6.2.2. Off‐site emergency response<br />

As with the on‐site emergency response, there must be a clearly def<strong>in</strong>ed organization and<br />

decision‐mak<strong>in</strong>g process to decide on an appropriate response, and to organize<br />

implementation measures. Generally, an off‐site emergency response <strong>in</strong>cludes three<br />

possible actions: shelter<strong>in</strong>g; chemical protection; and evacuation.<br />

Shelter<strong>in</strong>g<br />

In case of a small off‐site release, shelter<strong>in</strong>g of the nearby population may provide<br />

sufficient mitigation. In this context, shelter<strong>in</strong>g means requir<strong>in</strong>g the population to rema<strong>in</strong><br />

<strong>in</strong>doors, with doors and w<strong>in</strong>dows closed, until a release has ended and the plume of<br />

radionuclide has dispersed. Shelter<strong>in</strong>g can provide significant protection through<br />

shield<strong>in</strong>g aga<strong>in</strong>st “soft” radiation and the effect of slow <strong>in</strong>terchange between <strong>in</strong>terior and<br />

ambient air. Shelter<strong>in</strong>g is the m<strong>in</strong>imum level of protective action for the public, and<br />

<strong>in</strong>volves little risk but some <strong>in</strong>convenience.<br />

Chemical protection<br />

A significant contribution to risk from a radioactive release is uptake of radioactive iod<strong>in</strong>e<br />

<strong>in</strong>to the thyroid. Children are especially at risk of develop<strong>in</strong>g thyroid cancer from this<br />

source. A possible emergency preparedness measure is to supply normal iod<strong>in</strong>e pills to<br />

persons with<strong>in</strong> the emergency plann<strong>in</strong>g zone to be taken if a release conta<strong>in</strong><strong>in</strong>g iod<strong>in</strong>e is<br />

expected. In this way, radioiod<strong>in</strong>e will be prevented from concentrat<strong>in</strong>g <strong>in</strong> the thyroid,<br />

afford<strong>in</strong>g a measure of protection.<br />

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