Pool-type nuclear reactor system having a parallel flow path for residual heat removal

A pool-type nuclear reactor system comprising:

• a normal coolant circulation flow path configured that after a low-temperature coolant pumped by a pump located in a low-temperature pool flows into a core inlet plenum, the coolant is heated while passing through the core, and is accommodated into a high-temperature pool, and, during normal operation, a high-temperature coolant located in a high-temperature pool is cooled while passing through an intermediate heat exchanger and is re-introduced into the low-temperature pool;
• an emergency coolant circulation flow path configured that, in the event of a power outage accident, after the high-temperature coolant located in the high-temperature pool heated by the core is re-introduced into the low-temperature pool, the coolant flows into the core inlet plenum through the pump and is cooled during the re-introduction process or after the re-introduction;
• and
• a parallel flow path for residual heat removal configured to connect the core inlet plenum and the low-temperature pool so that, during normal operation, a portion of the low-temperature coolant located in the core inlet plenum flows to the low-temperature pool, and, in the event of a power outage accident, a portion of the low-temperature coolant located in the low-temperature pool flows to the core inlet plenum.

A pool-type nuclear reactor system characterized by comprising:

• a core unit having a core and a core inlet plenum;
• a high-temperature pool for accommodating a high-temperature coolant heated while passing through the core;
• an intermediate heat exchanger for heat exchange with the high-temperature coolant of the high-temperature pool during normal operation;
• an auxiliary cooling system for cooling while flowing the high-temperature coolant in the event of a power outage accident;
• a low-temperature pool for accommodating a low-temperature coolant cooled by the intermediate heat exchanger or the auxiliary cooling system;
• a pump that provides a driving force for flowing the low-temperature coolant located in the low-temperature pool into the core inlet plenum;
• and
• a parallel flow path for residual heat removal that connects the core inlet plenum and the low-temperature pool and allowing the coolant to flow,
• wherein the parallel flow path for residual heat removal has a preset flow resistance so that the coolant can flow from the core inlet plenum to the low-temperature pool during normal operation and flow from the low-temperature pool to the core inlet plenum in the event of a power outage accident.