Primary reactor auxiliary cooling system PRACS

Primary Reactor Auxiliary Cooling System (PRACS)... [Pg.519]

Four primary reactor auxiliary cooling systems (PRACS) are used A cooling coil is installed in the inlet plenum of each IHX and a heat transfer coil is installed in the mr cooler of ultimate heat sink Coolant is circulated by EM pumps supported by emergency AC power The air cooler consists of a blower, a stack, vanes and dampers The blower is supported by the emergency AC power The vanes and the dampers are operated by the emergency DC power Decay heat removal by natural circulation is possible to mitigate a total blackout event (loss of all AC power)... [Pg.521]

Decay heat removal Primary reactor auxiliary cooling system (PRACS) Steam/water system Active Active N/C operation available Non-safety grade... [Pg.527]

The natural air cooling system in the reactor vessel is designed so that it is capable of removing decay heat without operation of the Primary Reactor Auxiliary Cooling System (PRACS). [Pg.536]

LOF Primary Reactor Auxiliary Cooling System (PRACS) Reactor Vessel Auxiliary Cooling System (RVACS) TOP Mechanical stop of hydraulic drive system of reflector... [Pg.541]

Reactor vessel auxiliary cooling system (RVACS) and primary reactor auxiliary cooling system (PRACS), see Fig. XV-3. [Pg.432]

The DHRS consists of a combination of one loop of DRAGS and two loops of the primary reactor auxiliary cooling system (PRACS). The heat exchanger of DRAGS is dipped in the upper plenum within the RV. The heat exchanger of each PRAGS is located in the primary-side upper plenum of an IHX. AU of these systems can be operated based on a fiiUy passive feature with natural circulation, which requires no active components such as pumps (Yamano, 2010). [Pg.288]

RVACS - Reactor vessel auxiliary cooling system DHX - Direct heat exchanger PRACS - Primary reactor auxiliary cooling system RV -Reactor vessel... [Pg.429]

LORL, loss of reactor level LOHS, loss of heat sink RV, reactor vessel GV, guard vessel D/2AC5, direct reactor auxiliary cooling system DHRS, decay heat removal system PRACS, primary reactor auxiliary cooling system AM, accident management. [Pg.302]