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Emergency Core Cooling System
Any accident resulting in a loss of reactor coolant automatically sets off the Emergency Core Cooling System (ECCS).
Made up of multiple safety systems, each one functioning independently, ECCS also has its own diesel-driven standby generators that take over if external power is lost.
High Pressure Core Flooder (HPCF) and Reactor Core Isolation Cooling (RCIC) Systems
These systems inject water into the core to cool it and reduce reactor pressure.
Low Pressure Flooder (LPFL) System
Once pressure in the reactor vessel is reduced, this system injects water into the reactor vessel. The reactor core is then cooled safely.
Automatic-Depressurization System
Should the high-pressure injection system fails, this system lowers the reactor vessel pressure to a level where the LPFL system can function.
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