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Availability assessment method and device for nuclear safety dcs system

A DCS system and nuclear safety technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as the complexity of the calculation process, and achieve the effects of improving accuracy, intuitive modeling methods, and easy understanding

Active Publication Date: 2021-10-08
CHINA TECHENERGY +1
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Problems solved by technology

[0011] In order to solve the technical problems of the Markov theory calculation method applied in the availability assessment of the nuclear safety DCS system in the prior art, the existing calculation process is too complicated, etc., the present invention provides a method and device for the availability assessment of the nuclear safety DCS system , by using the fault tree for usability evaluation, the modeling method is more intuitive and easy to review, the calculation method is relatively simple and easy to converge, and is suitable for engineering applications

Method used

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  • Availability assessment method and device for nuclear safety dcs system
  • Availability assessment method and device for nuclear safety dcs system
  • Availability assessment method and device for nuclear safety dcs system

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Embodiment

[0046] Such as figure 2 As shown, the present embodiment provides a method for evaluating the availability of a nuclear safety level DCS system (English full name Digital ControlSysytem, ​​digital instrument control system, also known as DCS system), the method comprising:

[0047] S110. Taking the unavailability of the nuclear safety level DCS system as the top event, according to the unavailability criterion, analyze the redundant structure and functional logic of the nuclear safety level DCS system, and build a fault tree from top to bottom; wherein, when the nuclear safety level DCS system When the corresponding subsystem in the fault tree includes a board, in the fault tree, the lowest layer of each functional unit in the subsystem is the board.

[0048] In this embodiment, preferably, the above method further includes: confirming factors that cause the nuclear safety-level DCS system to be out of operation or cause malfunctions that affect the economics of the power pla...

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Abstract

The invention belongs to the technical field of nuclear power control. In order to solve the technical problem that the existing Markov theory calculation method is applied to the availability evaluation of the nuclear safety DCS system, the existing calculation process is too complicated, the invention provides a nuclear safety DCS A system availability assessment method and device; the method includes: analyzing the redundant structure and functional logic of the nuclear safety level DCS system, and establishing a fault tree from top to bottom; wherein, when the nuclear safety level DCS system is in the fault tree When the corresponding subsystem in includes a board, in the fault tree, the lowest layer of each functional unit in the subsystem is a board; obtain the failure rate parameter and average fault maintenance of each board in the fault tree time, then obtain the availability parameters of the functional units, and analyze the availability of the nuclear safety DCS system in combination with the availability, redundant structure and functional logic of each functional unit in the fault tree.

Description

technical field [0001] The invention relates to the technical field of nuclear power safety control, in particular to an availability evaluation method and device for a nuclear safety level DCS system. Background technique [0002] Compared with thermal power, nuclear power has achieved good development due to its advantages in environmental protection and large power generation. However, the Fukushima nuclear power plant accident in Japan in 2011 made the safety of nuclear power plants a matter of great concern. Therefore, the nuclear power plant instrument and control system Various considerations have been added to safety factors in the design process. The nuclear safety level digital control system (Digital Control System, referred to as DCS) is the core control system of the nuclear power plant, and the availability of the nuclear safety level DCS system is used to evaluate the indicators of the nuclear safety level DCS system failure and maintenance process; therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q10/0639G06Q50/06
Inventor 江国进李明利孙永滨白涛张春雷马建新张智慧高超谢逸钦李刚莫昌瑜吴彬张杰
Owner CHINA TECHENERGY
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