| 摘要 |
PROBLEM TO BE SOLVED: To provide an atomic reactor capable of stably removing decay heat by a decay heat removal system even when the power supply is totally turned off.SOLUTION: A decay heat removal system for removing the decay heat generated when the reactor is stopped by exchanging heat between a reactor coolant circulating inside a reactor vessel and the atmospheric air via a coolant medium circulating in a closed circuit in natural convection includes: a chimney-shaped air flow passage 30 provided with an air inlet port 31 and an air discharge port 32 to circulate the air in natural convection; a decay heat removal exchanger provided inside the core coolant for exchanging heat between the coolant medium and the core coolant; an air cooler 40 provided in the air passage 30 for exchanging heat between the coolant medium and the air; an air flow controller 50 having an inlet dumper 51 and a discharge dumper 52 for adjusting the amount of an air flow passing through the air cooler 40 provided in the air passage 30; and a thermoelectric generation device 60 provided on the outer wall of the air passage 30 for generating the power based on a temperature difference between the outside and the inside of the flow passage so as to become a power supply source of the air flow controller 50 when the power is totally turned off. |
