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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 />

systems; combustible gas control and analyz<strong>in</strong>g systems; vent<strong>in</strong>g and purg<strong>in</strong>g systems;<br />

and associated <strong>in</strong>strumentation. The operational conditions specified shall be such that the<br />

release of radioactive materials from the conta<strong>in</strong>ment system will be restricted to those<br />

leakage paths and rates assumed <strong>in</strong> the accident analyses. Precautions for access control<br />

shall be specified <strong>in</strong> order to ensure that the conta<strong>in</strong>ment system’s effectiveness is not<br />

impaired.<br />

Where remote shutdown <strong>in</strong>strumentation and control are provided <strong>in</strong> the plant design to<br />

account for the possible loss of habitability of the ma<strong>in</strong> control room, the operability<br />

requirements for the essential items (e.g. temperature, pressure, flow, neutron flux) shall<br />

be stated to permit the plant to be shutdown and ma<strong>in</strong>ta<strong>in</strong>ed <strong>in</strong> a safe condition from a<br />

location or locations outside the ma<strong>in</strong> control room.<br />

10.3.2.5. Electrical power systems<br />

Requirements for availability of the electrical power sources shall be stated for all<br />

operational states. These <strong>in</strong>clude: off‐site sources; on‐site generation (diesels, gas turb<strong>in</strong>es,<br />

<strong>in</strong>clud<strong>in</strong>g associated fuel reserves); batteries and associated control; protective,<br />

distribution and switch<strong>in</strong>g devices. The operability requirements shall be such that<br />

sufficient power will be available to supply all safety‐related equipment required for the<br />

safe shutdown of the plant and for the mitigation and control of accident conditions. The<br />

operability requirements shall determ<strong>in</strong>e the necessary power, redundancy of supply l<strong>in</strong>es,<br />

maximum permissible time delay, and necessary duration of emergency power supply.<br />

10.3.2.6. Other systems<br />

Ventilation systems<br />

Where applicable, appropriate limits shall be established on ventilation system operability<br />

where such systems have been provided for the purpose of controll<strong>in</strong>g airborne<br />

radioactivity with<strong>in</strong> stated limits or for support of a safety system.<br />

❙ 646 ❙

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