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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 />

vessels are those that had been used for the calculations dur<strong>in</strong>g the design of the power<br />

plant. The results from fatigue monitor<strong>in</strong>g are used for the lifetime management. They<br />

show areas where it could be necessary to extend <strong>in</strong>‐service <strong>in</strong>spections, or maybe areas<br />

where the extent of the <strong>in</strong>spection can be decreased or the <strong>in</strong>spection <strong>in</strong>terval can be<br />

enlarged.<br />

Fatigue monitor<strong>in</strong>g systems record the measured data cont<strong>in</strong>ually. The data are analyzed<br />

periodically. Necessary corrective actions are performed dur<strong>in</strong>g a refuel<strong>in</strong>g outage.<br />

Usually those systems have no alarm levels.<br />

12.4.3. Surveillance test<br />

12.4.3.1 Typical surveillance test<br />

Typical surveillance tests for process control are:<br />

Functional tests for <strong>in</strong>dividual pumps (feed rates, actuation, <strong>in</strong>terlocks, etc);<br />

Functional tests of specific valves (shutoff time, leakages, diagnostic<br />

measurements, etc.)<br />

Functional tests of snubbers (mechanical and hydraulic snubbers)<br />

Functional tests of fans (e.g. conta<strong>in</strong>ment cool<strong>in</strong>g fans, ma<strong>in</strong> control room fans,<br />

etc.)<br />

Functional tests of electrical parts and emergency diesel generators (mechanical<br />

components operability and electrical capability, etc.)<br />

Monitor<strong>in</strong>g of records, bar charts, logg<strong>in</strong>g sheet for systems and component<br />

important to safety<br />

Test<strong>in</strong>g the actuat<strong>in</strong>g signal (e.g. reactor protection system actuates several valves)<br />

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