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Regional Basic Professional Training Course in Korea

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❏ physical separation.<br />

❙ 303 ❙<br />

4. DESIGN OF NUCLEAR REACTORS<br />

Separation by geometry (distance, orientation, etc.), by appropriate barriers, or by a<br />

comb<strong>in</strong>ation thereof.<br />

❏ postulated <strong>in</strong>itiat<strong>in</strong>g event4.<br />

An event identified dur<strong>in</strong>g design as capable of lead<strong>in</strong>g to anticipated operational<br />

occurrences or accident conditions.<br />

❏ protection system.<br />

System which monitors the operation of a reactor and which, on sens<strong>in</strong>g an abnormal<br />

condition, automatically <strong>in</strong>itiates actions to prevent an unsafe or potentially unsafe<br />

condition.<br />

❏ safety function.<br />

A specific purpose that must be accomplished for safety.<br />

❏ safety group.<br />

The assembly of equipment designated to perform all actions required for a particular<br />

postulated <strong>in</strong>itiat<strong>in</strong>g event to ensure that the limits specified <strong>in</strong> the design basis for<br />

anticipated operational occurrences and design basis accidents are not exceeded.<br />

❏ safety system.<br />

A system important to safety, provided to ensure the safe shutdown of the reactor or the<br />

residual heat removal from the core, or to limit the consequences of anticipated<br />

operational occurrences and design basis accidents.<br />

❏ safety system sett<strong>in</strong>gs.<br />

The levels at which protective devices are automatically actuated <strong>in</strong> the event of<br />

anticipated operational occurrences or accident conditions, to prevent safety limits be<strong>in</strong>g

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