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A core melt grouping and capturing vessel

A technology of core melt and melt, applied in the direction of reactors, greenhouse gas reduction, climate sustainability, etc., can solve problems such as group capture of core melt that has not been considered, minimize the release of radioactive substances, and realize automatic sealing effect

Active Publication Date: 2019-12-13
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] All the above-mentioned patents related to the core catcher do not consider the use of independent containers to capture the core melt in groups

Method used

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  • A core melt grouping and capturing vessel
  • A core melt grouping and capturing vessel
  • A core melt grouping and capturing vessel

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Experimental program
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Embodiment Construction

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, it is a double-layer spherical shell structure core melt group collection container provided by the present invention, which is the key equipment to realize the independent collection of reactor core melt group. The collection container includes a shell 1 and a rotatable inner tank 2 arranged in the outer shell 1. A gap 13 between the outer shell 1 and the inner tank 2 is provided, and the maximum width of the gap 13 of the shell inner tank is smaller than that of the inner tank 2. 8% of the diameter. The material of shell 1 can be TaN, ZrN, WB 2 , SiC and ZrB 2, the material of the liner 2 can be a metal or an alloy with a melting point higher than 1500°C. A plurality of liner supports 7 with fixed positions are arranged in the space 13 of the inner liner of the outer casing. The in...

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Abstract

The invention relates to a core melt grouping trapping container. The container comprises a housing and an inner container rotatingly ranged in the housing. A housing-inner container gap is formed between the housing and the inner container. Multiple fixed inner container supports are arranged in the gap. The inner wall of the housing is provided with blocking bosses. The inner wall of the inner container is provided with an inner container eccentric balance weight. After the inner container is filled with melt, the center of gravity of the inner container produces an offset, and in a container rolling state, the blocking bosses lock the inner container so that the inner container is in a seal state. Corresponding positions of the housing and the inner container are respectively provided with a housing melt inlet and an inner container melt inlet. The grouping trapping container is conducive to effective cooling and minimizes radioactive substance release. Relative displacement of the double-layer ball shell structure realizes container self-sealing. Through combination of a metal inner container gravity center offset design and the bosses of the inner wall of the refractory ceramic housing, the inner container is locked in a container rolling state.

Description

technical field [0001] The invention belongs to the field of core catcher design, in particular to a grouped catch container for core melt. 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 through, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C9/016
CPCG21C9/016Y02E30/30
Inventor 韩旭马卫民马一元一单师鹏王一光朱晨张丽郭强
Owner CHINA NUCLEAR POWER ENG CO LTD
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