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Reactor core melt grouping catcher

A core melt and trap technology, which is applied in the field of nuclear safety control, can solve the problems of not considering the group capture of core melt, and achieve the effects of effective cooling, increased storage ratio, and minimized release

Pending Publication Date: 2021-07-27
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, all the above-mentioned patents related to the core catcher do not consider the use of independent containers to collect the core melt in groups

Method used

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  • Reactor core melt grouping catcher
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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The structure of the reactor core melt group trap of the exemplary invention is as follows Figure 1-2 As shown, it includes the upper hemisphere 1 of the high-temperature-resistant ceramic shell, the lower hemisphere 2 of the high-temperature-resistant ceramic shell, the upper hemisphere 3 of the metal liner, the main molten material sipping channel 4, the auxiliary molten material sipping channel 5, the inner tank counterweight 6, and the outer shell Counterweight 7, fixing bolt 8, metal liner lower hemisphere 10, screw thread 11.

[0027] The upper hemisphere 1 and the lower hemisphere 2 of the high-temperature-resistant ceramic shell are made of ceramics or ceramic composite materials (here specifically zirconia or SiC) with a melting point not lower than 1800°C, and they are connected together by threads 11 to form Co...

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Abstract

The invention belongs to the technical field of nuclear safety control, and relates to a reactor core melt grouping catcher. The grouping catcher comprises a double-layer spherical shell structure formed by a high-temperature-resistant ceramic shell and a metal inner container, wherein a fully-sealed hollow structure is formed in the metal inner container and used for trapping reactor core melts through a main melt sipping channel and an auxiliary melt sipping channel which are formed in the high-temperature ceramic shell, the area of the main melt sipping channel is larger than that of the auxiliary melt sipping channel, and a certain included angle alpha is formed between the axis of the main melt sipping channel and the axis of the auxiliary melt sipping channel. By using the reactor core melt grouping catcher provided by the invention, the reactor core melt can be grouped and trapped through the independent container.

Description

technical field [0001] The invention belongs to the technical field of nuclear safety control, and relates to a reactor core melt group catcher. Background technique [0002] After the serious accidents at the Three Mile Island and Chernobyl nuclear power plants, the nuclear power industry began to focus on research and research on the prevention and mitigation of severe accidents. Due to engineering and other requirements. When a serious accident occurs in a pressurized water reactor nuclear power plant, the loss of core waste heat removal means will evaporate and exhaust the coolant, the core will be exposed and continue to heat up, the fuel elements will melt due to the loss of cooling, and the core melt will fall into the pressure vessel ( RPV) lower chamber, which in turn causes the failure of the lower head of the pressure vessel. If effective measures cannot be taken to cool it, the core melt may melt through the pressure vessel. After the pressure vessel melts thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/016
CPCG21C9/016Y02E30/30
Inventor 韩旭邢继王一光元一单
Owner CHINA NUCLEAR POWER ENG CO LTD
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