Reliability analysis method for marine passive safety system

A technology of safety system and analysis method, which is applied in the field of probabilistic safety analysis and evaluation, can solve problems such as the consideration of the impact of no operating environment and the reliability of passive systems, and achieve the effects of expanding the scope of application, accurate calculation, and comprehensive calculation

Active Publication Date: 2018-01-19
HARBIN ENG UNIV
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Problems solved by technology

However, due to the influence of ocean conditions, the operating environment of the marine passive safety system is in a complex and changeable state. The natural circulation flow and heat transfer characteristics are affected by sea conditions such as swaying and tilting, and the operating characteristics of the passive safety system are

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  • Reliability analysis method for marine passive safety system
  • Reliability analysis method for marine passive safety system
  • Reliability analysis method for marine passive safety system

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Embodiment Construction

[0020] A kind of marine passive safety system reliability analysis method provided by the present invention is described in detail below in conjunction with accompanying drawing:

[0021] figure 1 It shows a reliability analysis flow chart of a marine passive safety system provided by the present invention.

[0022] The mechanism of the passive waste heat removal system is based on natural circulation and involves complex thermal-hydraulic processes. Especially under the condition of ocean motion, the realization of its system function is determined by the coupling of the operating state of the entire nuclear power plant. When using marine parameter processing technology to deal with complex and changeable sea conditions, the motion of the nuclear power plant is usually decomposed into 6 degrees of freedom motion, including rotational motion around each axis and linear motion along each axis. Its inclination, undulation and sway will change the geometric posture of the device...

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Abstract

The invention provides a reliability analysis method for a marine passive safety system, and belongs to the probability safety analysis and evaluation field of marine nuclear power units. The providedmethod comprises the following steps: (1) using complicated ocean motion as an uncertainty parameter, and combining thermotechnical hydraulic analytical calculation in the ocean condition; (2) screening system key parameters in the different running states by using a global sensitivity analysis method; (3) generating a response surface substitution model to improve the computational efficiency; and (4) integrating a physical invalid result to a PSA model, quantitatively calculating the reliability of the passive safety system under the different ocean conditions. The provided method is capable of integrating the complicated external operating environment to the probability safety analysis process, more efficiently, accurately and globally calculating the reliability of the passive safetysystem under the different ocean conditions, and expanding the application range of the passive system reliability analysis method.

Description

technical field [0001] The invention belongs to the field of probabilistic safety analysis and evaluation of marine nuclear power devices, and relates to a reliability evaluation method for a marine passive safety system. Background technique [0002] After the Fukushima accident in Japan, the new generation of reactor designs put forward higher requirements for inherent safety. The passive safety system relies on natural laws such as natural circulation and gravity as the driving force, reducing the dependence on external power supply and operator intervention; the passive safety system greatly simplifies the system layout, cancels valves, pumps and other equipment, and ensures While improving safety, it also greatly improves its economy. [0003] The passive safety system relies on the laws of physics to realize the system function, its driving force is small, and it is more sensitive to the fluctuation of the external operating environment and operating parameters. Unce...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 彭敏俊王晨阳夏庚磊丛腾龙王冰
Owner HARBIN ENG UNIV
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