Passive decay heat removal system for liquid metal cooling pool type reactor

Abstract

The invention discloses a passive decay heat removal system for a liquid metal cooling pool type reactor. The passive decay heat removal system is composed of a coolant inlet, a gravity-type heat pipe, an upper partition plate, a lower partition plate, a box body, a coolant outlet, a gas riser pipe, an exhaust stack, a thermal isolation layer, pipelines connected between devices, and valves. According to the invention, when a reactor is under accident states like station blackout, water supply interruption of a main heat exchanger or earthquake, a ventilation door of the exhaust stack is opened; cold air from the interior of a reactor containment enters into the box body through the coolant inlet, cools the condensing section of the gravity-type heat pipe and enters the gas riser pipe from the coolant outlet; hot air flows out of the reactor containment through the gas riser pipe; thus, the process has passive characteristic. The passive decay heat removal system provided by the invention has simple structure, is convenient to start, can simultaneously remove core decay heat and prevent radioactive substances in a reactor pit from escaping, and has passiveness, independence and high reliability.

Description

technical field [0001] The invention belongs to the technical field of reactor system component design, and in particular relates to a liquid metal cooling pool type reactor passive accident residual heat discharge system. Background technique [0002] The liquid metal cooling pool reactor adopts an integrated pool structure and uses a new type of coolant, liquid metal, as a coolant. It has good neutronics performance, thermal hydraulic performance and inherent safety, and is an important development direction of advanced fission reactors in the future. Among the six types of reactors with the most development potential recommended by the International Atomic Energy Agency (IAEA), lead-cooled fast reactors and sodium-cooled fast reactors are both liquid metal-cooled pool reactors. At present, lead-cooled reactors and lead-bismuth cooling Design and development of reactors and sodium-cooled reactors. [0003] In recent years, the research and development of passive safety sy...

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Problems solved by technology

[0009] The purpose of the present invention is to address the needs of liquid metal cooling pool reactor accident waste heat discharge, overcome the complex structure of the current prior art system, affect the reactor economy and the lack of heat discharge capacity, and provide a simple structure, high reliability, Passive accident waste heat removal system with independence and redundant safety

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