Large passive pressurized water reactor nuclear power plant crucible-type reactor core catcher

A core capture, passive technology, applied in nuclear power generation, reactors, nuclear engineering and other directions, can solve problems such as failure and radioactive material release

A core capture, passive technology, applied in nuclear power generation, reactors, nuclear engineering and other directions, can solve problems such as failure and radioactive material release

CN103177779AInactive Publication Date: 2013-06-26SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Large passive pressurized water reactor nuclear power plant crucible-type reactor core catcher

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] When a serious accident occurs in a nuclear power plant, the core begins to melt and collapse, and the molten material gradually accumulates in the lower chamber of the pressure vessel. In order to alleviate the consequences of serious accidents, the first function is the IVR function. Cooling water enters the reactor chamber through the reactor cavity water injection port 5, the water level in the reactor cavity gradually rises, and a two-phase natural circulation is established in the insulation layer 3. Water vapor comes out from insulation layer outlet 2. When the IVR function is successfully executed, the decay heat of the core melt can be conducted out through the wall of the reactor pressure vessel 1, thereby maintaining the integrity of the reactor pressure vessel 1.

[0017] When the IVR function cannot be successfully performed, the co...

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Abstract

The invention discloses a large passive pressurized water reactor nuclear power plant crucible-type reactor core catcher which comprises a reactor cavity concrete bottom plate (4), a crucible cooling system water filling nozzle (6), a crucible cooling system water vapor outlet (7), a crucible component (8), a crucible cooling system cavity (9) and a melt collector (10). The reactor core catcher is organically combined with an interactive voice response (IVR) system, the safety of the nuclear power plant can be further improved, and the reliability of the system is higher due to the crucible design.

Description

technical field [0001] The invention relates to the technical field of large-scale passive pressurized water reactors, in particular to a crucible-type core collector of a large-scale passive pressurized water reactor nuclear power plant. Background technique [0002] The use of the core trap can make the molten material from the pressure vessel effectively stay in a certain device. By adopting the corresponding external cooling technology of the molten material, the interaction between the core molten material and the concrete can be effectively prevented, thereby reducing the The risk of melting through the bottom of the small containment vessel, and significantly reducing the release of fission products to the environment, greatly reducing the radioactive consequences of severe accidents. [0003] In the design of the existing large passive PWR nuclear power plant, the technology of In-vessel retention (IVR) is adopted to ensure that the lower head of the reactor pressure...

Claims

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Application Information

Patent Timeline
26 Jun 2013
Publication
CN103177779A
IPC
G21C9/016
CPC
Y02E30/30
Inventors
黄高峰; 刘鑫