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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 />

for the reactor coolant pressure boundary, particularly <strong>in</strong> locations of high irradiation, and<br />

other important components as appropriate, for determ<strong>in</strong><strong>in</strong>g the metallurgical effects of<br />

factors such as irradiation, stress corrosion crack<strong>in</strong>g, thermal embrittlement and age<strong>in</strong>g of<br />

structural materials.<br />

Indicators for the <strong>in</strong>tegrity of the reactor coolant pressure boundary (such as leakage)<br />

shall be monitored. The results of such measurements shall be taken <strong>in</strong>to consideration <strong>in</strong><br />

the determ<strong>in</strong>ation of which <strong>in</strong>spections are necessary for safety.<br />

If the safety analysis of the nuclear power plant <strong>in</strong>dicates that particular failures <strong>in</strong> the<br />

secondary cool<strong>in</strong>g system may result <strong>in</strong> serious consequences, it shall be ensured that it is<br />

possible to <strong>in</strong>spect the relevant parts of the secondary cool<strong>in</strong>g system.<br />

Inventory of reactor coolant<br />

Provision shall be made for controll<strong>in</strong>g the <strong>in</strong>ventory and pressure of coolant to ensure<br />

that specified design limits are not exceeded <strong>in</strong> any operational state, with volumetric<br />

changes and leakage taken <strong>in</strong>to account.<br />

Cleanup of the reactor coolant<br />

Adequate facilities shall be provided for removal of radioactive substances from the<br />

reactor coolant, <strong>in</strong>clud<strong>in</strong>g activated corrosion products and fission products leak<strong>in</strong>g from<br />

the fuel.<br />

Removal of residual heat from the core<br />

Means for remov<strong>in</strong>g residual heat shall be provided. Their safety function shall be to<br />

transfer fission product decay heat and other residual heat from the reactor core at a rate<br />

such that specified fuel design limits and the design basis limits of the reactor coolant<br />

pressure boundary are not exceeded.<br />

❙ 254 ❙

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