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Regional Basic Professional Training Course in Korea

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6. Safety Classification Of Structures, Systems and Components<br />

particularly: the system for the control room (and the associated chilled water<br />

production); those ensur<strong>in</strong>g an eng<strong>in</strong>eered safeguard function: those <strong>in</strong>dispensable to<br />

the operation of the eng<strong>in</strong>eered safeguard systems; those for electrical rooms<br />

hous<strong>in</strong>g equipment ensur<strong>in</strong>g an eng<strong>in</strong>eered safeguard function; and those for rooms<br />

hous<strong>in</strong>g electrical equipment for the hous<strong>in</strong>g electrical equipment for the diesel<br />

generators<br />

Activity measurements actuat<strong>in</strong>g safeguards systems<br />

Electrical systems correspond<strong>in</strong>g to portions of the follow<strong>in</strong>g functions support<strong>in</strong>g<br />

the above functions: emergency power supply (diesel generators, storage batteries<br />

and battery chargers, associated distribution networks), component cool<strong>in</strong>g,<br />

essential service water.<br />

6.5.2. Non Class 1E<br />

6.5.2.1 Def<strong>in</strong>ition of non class 1E<br />

The electrical systems and equipment necessary for perform<strong>in</strong>g the follow<strong>in</strong>g safety<br />

functions :<br />

− return<strong>in</strong>g the reactor to the cold shutdown state and ma<strong>in</strong>ta<strong>in</strong><strong>in</strong>g it there;<br />

− surveillance of the post‐accident phase;<br />

− retention of gaseous effluents;<br />

− fuel handl<strong>in</strong>g where failure could result <strong>in</strong> radioactive releases;<br />

− cool<strong>in</strong>g of spent fuel;<br />

− isolation of the primary system from the auxiliary systems;<br />

❙ 403 ❙

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