System for generating power through decay heat of reactor core melting objects

Abstract

The invention discloses a system for generating power through decay heat of reactor core melting objects and belongs to the technical field of reactor safety system design. The system comprises a thermoelectric conversion component (1), a heat transfer component (2) and an electric energy storage, transmission and distribution component (3), wherein the heat transfer component (2) and the electric energy storage, transmission and distribution component (3) are connected with the thermoelectric conversion component (1). The thermoelectric conversion component (1) comprises a high-temperature end (18) and a low-temperature end (19). The high-temperature end (18) is connected with a heat source (4) through the heat transfer component (2). The low-temperature end (19) is connected with a hot trap (5) through the heat transfer component (2). According to the system, decay heat of a reactor core is used, power is generated in a passive mode of thermoelectric conversion, the system can guarantee that a power source is provided for an important monitoring instrument under the serious accident condition and a serious accident relieving facility, and the probability safety index of the frequency of radioactive substances released to the environment under the serious accident condition is remarkably improved.

Description

technical field [0001] The invention relates to the design technology of the reactor safety system, in particular to a system for generating electricity through thermoelectric conversion and utilization of the decay heat of the molten material melted down in a serious accident of a nuclear reactor. Background technique [0002] In the Fukushima nuclear accident in 2011, due to the tsunami, units 1 to 4 lost all external power supplies, lacked effective emergency power supply, and important monitoring instruments related to safety in multiple power plants lost their functions, and the safety facilities for performing accident mitigation functions were also not available. Can be put into operation, and eventually caused a catastrophic serious accident. [0003] After the Fukushima accident, nuclear safety regulators and the nuclear industry in various countries have put forward higher requirements for the safety of nuclear power plants. China's newly designed third-generation...

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Problems solved by technology

[0002] In the Fukushima nuclear accident in 2011, due to the tsunami, units 1 to 4 lost all external power supplies, lacked effective emergency power supply, and important monitoring instruments related to safety in multiple power plants lost their functions, and the safety facilities for performing accident mitigation functions were also not available. Can be put into operation, eventually causing a catastrophic serious accident

[0005] In severe accidents, nuclear power plants still need to ensure the power supply for necessary monitoring instruments or safety system equipment. At present, most nuclear power plants use diesel generators and battery packs as emergency power sources, but they are still limited by diesel storage capacity or battery capacity.

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