04.02.2013 Views

Regional Basic Professional Training Course in Korea

Regional Basic Professional Training Course in Korea

Regional Basic Professional Training Course in Korea

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

<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 emergency core cool<strong>in</strong>g system shall be designed to permit appropriate periodic<br />

<strong>in</strong>spection of important components and to permit appropriate periodic test<strong>in</strong>g to confirm<br />

the follow<strong>in</strong>g:<br />

The structural <strong>in</strong>tegrity and leak‐tight <strong>in</strong>tegrity of its components;<br />

The operability and performance of the active components of the system <strong>in</strong> normal<br />

operation, as far as feasible; and<br />

The operability of the system as a whole under the conditions specified <strong>in</strong> the<br />

design basis, to the extent practicable.<br />

Heat transfer to an ultimate heat s<strong>in</strong>k<br />

Systems shall be provided to transfer residual heat from structures, systems and<br />

components important to safety to an ultimate heat s<strong>in</strong>k. This function shall be carried out<br />

at very high levels of reliability <strong>in</strong> operational states and <strong>in</strong> design basis accidents.<br />

The reliability of the systems shall be achieved by an appropriate choice of measures<br />

<strong>in</strong>clud<strong>in</strong>g the use of proven components, redundancy, diversity, physical separation,<br />

<strong>in</strong>terconnection and isolation.<br />

Adequate consideration shall be given to extend<strong>in</strong>g the capability to transfer residual heat<br />

from the core to an ultimate heat s<strong>in</strong>k so as to ensure that, <strong>in</strong> the event of a severe<br />

accident, acceptable temperatures can be ma<strong>in</strong>ta<strong>in</strong>ed <strong>in</strong> structures, systems and<br />

components important to the safety function of conf<strong>in</strong>ement of radioactive materials.<br />

4.1.5.3. Conta<strong>in</strong>ment system<br />

Design of the conta<strong>in</strong>ment system<br />

A conta<strong>in</strong>ment system shall be provided <strong>in</strong> order to ensure that any release of radioactive<br />

materials to the environment <strong>in</strong> a design‐basis accident would be below specified limits.<br />

❙ 256 ❙

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!