Passive nuclear power station LOCA (Loss of Coolant Accident) accident mitigating system

An accident mitigation and passive technology, applied in the field of nuclear power plant safety, can solve problems such as nuclear power plant accidents, achieve reliable performance, easy market promotion and application, and mitigate the effects of harm

Inactive Publication Date: 2010-12-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

If not handled properly, it will cause serious accidents in nuclear power plants

Method used

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  • Passive nuclear power station LOCA (Loss of Coolant Accident) accident mitigating system
  • Passive nuclear power station LOCA (Loss of Coolant Accident) accident mitigating system
  • Passive nuclear power station LOCA (Loss of Coolant Accident) accident mitigating system

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Embodiment Construction

[0013] The invention provides a passive nuclear power plant LOCA accident mitigation system aimed at the deficiencies of the prior art. It is an accident mitigation system with simple structure, stable performance and high reliability developed by utilizing the strong moisture absorption function of lithium bromide solution. The specific structure, working process and best implementation mode of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] figure 1 It is a schematic diagram of passive nuclear power plant LOCA accident mitigation system. figure 2 It is a schematic diagram of a passive memory alloy intelligent switch device. In the figure, in the upper part of the containment shell 18, the first group of memory alloy intelligent switch device A is connected to the lid of the lithium bromide solution tank 1, and the first group of memory alloy intelligent switch device A is used as a valve for opening the box cov...

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Abstract

The invention discloses a passive nuclear power station LOCA (Loss of Coolant Accident) accident mitigating system belonging to the technical field of nuclear power station safety. Memory alloy is connected with a four-bar mechanism and a valve in series to form a corresponding memory alloy intelligent switching device by utilizing the characteristic that the memory alloy generates contraction deformation at certain temperature, and the memory alloy intelligent switching device is installed at a proper position in a containment and executes a corresponding brake action under the condition that high-temperature and high-pressure steam is filled in the LOCA accident containment. The strong moisture absorption characteristic of lithium bromide solution is utilized to absorb the high-temperature and high-pressure steam in the containment, thereby achieving the goal of mitigating the accident. Lots of passive modes of natural circulation, four-bar mechanism power transmission, pressure action and the like exist in the system. The system mainly adopts the passive automatic operation and has the advantages of convenient implementation, simple control and high reliability, safety and stability.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant safety, in particular to a passive nuclear power plant breach accident mitigation system. Specifically, when a breach accident (LOCA) occurs in a nuclear power plant, the coolant in the primary circuit is sprayed into the containment vessel, causing high temperature and high pressure in the containment vessel, which may cause serious accidents. It absorbs moisture and reduces pressure and temperature, so as to suppress or alleviate accidents and reduce the hazards of accidents. Background technique [0002] When a LOCA accident occurs in a pressurized water reactor nuclear power plant, the high-temperature and high-pressure water in the primary circuit will turn into steam, and the steam will be injected into the containment vessel, resulting in an increase in the pressure and temperature of the containment vessel. If not handled properly, it will cause serious accidents in nuclear po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/033
CPCY02E30/40Y02E30/30
Inventor 周涛李洋刘梦影
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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