Regional Basic Professional Training Course in Korea

the safety function
would be required
(e.g. RHR)
3 1. Supporting of class
1, 2 and 3 safety
functions (no
increase in radiation
exposure)
2. Prevention of
radiation exposure
from sources outside
reactor coolant
system
3. Reactivity control
on a slower time
scale than in class 1
and 2
4. Maintaining
sub‐criticality of
fuel (outside reactor
coolant system)
5. Removal of decay
heat from irradiated
fuel (outside reactor
coolant system)
6. Safety Classification Of Structures, Systems and Components
emergency core cooling (e.g. refueling water storage tank).
3 Equipment, not included in SC‐1 or SC‐2, that is designed to
accomplish the following nuclear safety functions that:
1. ensure hydrogen control of the primary containment
atmosphere to acceptable limits, except for primary
containment boundary extension function;
2. remove radioactive material from the atmosphere of
confined spaces outside primary containment. (e.g. control
room or fuel building) containing SC‐1, SC‐2, or SC‐3
equipment;
3. introduce negative reactivity to achieve or maintain
sub‐critical reactor conditions (e.g. boron makeup);
4. provide or maintain sufficient reactor coolant inventory for
core cooling (e.g. reactor coolant normal makeup system);
5. maintain geometry within the reactor to ensure core
reactivity control or core cooling capability (e.g. core
support structures);
6. structurally load‐bear or protect SC‐l, SC‐2, or SC‐3
equipment (This applies to concrete or steel structures that
are not within the scope of the KEPIC MN (nuclear
mechanical) in accordance with Notice of MEST
No.2008‐14, and its corresponding code (ASME Boiler and
Pressure Vessel Code Section III);
7. provide radiation shielding for the control room or off‐site
personnel;
8. ensure required cooling for liquid‐cooled stored fuel (e.g.
spent fuel storage pool and cooling system);
9. ensure nuclear safety functions provided by SC‐1, SC‐2, or
SC‐3 equipment (e.g. provide heat removal for SC‐l, SC‐2,
or SC‐3 heat exchangers, provide lubrication of SC‐2 or
SC‐3 pumps, provide fuel oil to the emergency diesel
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