KR-20260066483-A - Dependability Management Method and System

Abstract

A reliability management system according to one embodiment of the present invention comprises: a reliability implementation plan module responsible for inputting and searching reliability data; a maintenance case DB including power plant I&C equipment failures, etc.; and a reliability verification and validation module that performs verification and validation of reliability data through testing, wherein the reliability implementation plan created by the reliability implementation plan module and the maintenance case DB including actual power plant failures, etc., stored in the maintenance case DB including power plant I&C equipment failures, etc., are compared to perform a process to verify and validate whether reliability goals are achieved, thereby deriving a result value regarding whether reliability goals are achieved. The reliability implementation plan module is characterized by including an MTBF section, MTTR, FMEA section, maintenance method/procedure section, and related tool section to support an input screen, an FMEA monitoring screen, and a reliability value verification screen.

Inventors

• 강성곤
• 이동일
• 최서용

Assignees

• 한국수력원자력 주식회사

Dates

Publication Date

20260512

Application Date

20241104

Claims (7)

1. A character implementation plan module responsible for the input and retrieval of character data; DB of maintenance cases including power plant I&C equipment failures; and It includes a reliability verification and validation module that performs verification and validation of reliability data through testing, and performs a process to confirm and validate whether reliability goals are achieved by comparing the implementation plan created in the reliability implementation plan module with maintenance cases including actual power plant failures stored in the power plant I&C equipment failure maintenance case DB, thereby deriving a result value regarding whether reliability goals are achieved. The above reliability implementation plan module is a reliability management system comprising an MTBF section, MTTR, FMEA section, maintenance method/procedure section, and related tool section to support an input screen, an FMEA monitoring screen, and a reliability value verification screen.
2. In Article 1, The above power plant I&C equipment failure and maintenance case DB is a reliability management system including an I&C card failure DB, an I&C replacement cycle DB, and an I&C system failure DB.
3. In Article 1, Failure case-based data input module; An I&C facility that virtualizes the same facility applied to the above-mentioned nuclear power plant, created in the form of software, and linked to a simulator of the said nuclear power plant for the application of failure scenarios, and a virtual MMIC test facility that configures various failure scenarios of the actual above-mentioned nuclear power plant; and A reliability management system including a reliability management test facility that includes a module for deriving test results and reliability data.
4. For the management of credibility, the first step involves preparing an I&C facility credibility implementation plan. A step of performing the methods and procedures according to the reliability implementation plan of the above I&C facility reliability implementation plan during one cycle of nuclear power plant output operation using the I&C facility reliability management system; A step of analyzing whether the targets for MTBF and MTTR can be achieved using actual failure cases that occurred during the operation of the power plant and anticipated cases including failure possibilities from the maintenance case DB, such as failures of the power plant I&C equipment; When the credibility goal of the above I&C facility is achieved, a step of continuing to perform credibility management of the above I&C facility and inputting the result value into the step of applying the credibility management system of the above I&C facility to the credibility management system of the above I&C facility; and A method for managing reliability that includes the step of analyzing whether the reliability target of the I&C facility was not achieved, and feeding back the analysis results to a power plant DB for preparing a plan, when the above-mentioned I&C facility fails to achieve a reliability target.
5. In Article 4, The step of preparing the above I&C reliability implementation plan is a reliability management method prepared based on I&C equipment reliability data, such as MTBF values, MTTR values, and FMEA for each I&C facility installed in the power plant stored in the power plant DB, inspection and maintenance methods and procedures for the relevant I&C facilities, and specifications and drawings of the I&C facilities.
6. In Article 4, The above I&C reliability implementation plan includes a safety-grade I&C reliability implementation plan and a non-safety-grade I&C reliability implementation plan, and The above I&C reliability implementation plan is a reliability management method that includes design, maintenance, and testing standards for maintaining MTBF and MTTR targets as content for enhancing reliability (relevant I&C design requirements and specifications, cycles and periodic inspection methods, replacement cycles, failure response methods, testing methods and procedures, relevant equipment MTBF/MTTR, connectivity with maintenance-related companies, etc.).
7. In Article 5, Analyze and identify factors affecting reliability, maintainability, and maintainability in terms of availability during the Overrhaul (OH) period, and Based on the I&C architecture form, it is instrumental and structured in a tree format, and the lowest part consists of I&C devices (I&C CPU card, communication card, I/O card, CIM (Component Interface Module), and A reliability management method configured to derive the MTBF of each system based on quantitative data related to failure and availability, such as FMEA data and MTBF provided by the device supplier for each device, and ultimately derive the MTBF/MTTR value for the entire I&C architecture.

Description

Dependability Management Method and System for Nuclear Power Plant Equipment The present invention relates to a method and system for managing the reliability of nuclear power plant facilities, and more specifically, to provide a method and system for managing the reliability of nuclear power plant facilities to enable the practical implementation of a reliability program at the power plant site. Existing nuclear power plants are carrying out work to enhance equipment reliability by performing preventive maintenance, predictive maintenance, and corrective maintenance to improve the reliability of I&C facilities. Preventive maintenance refers to all maintenance activities carried out to prevent failures so that the operating condition and performance of power generation facilities can be maintained within the design standard range. Efforts are made to enhance equipment reliability by developing a Preventive Maintenance Template (PMT) for each I&C facility and performing preventive maintenance in advance. This preventive maintenance involves periodically inspecting I&C facilities during power plant operation to identify failures and issues with parts or equipment, and replacing parts or equipment as necessary. Predictive maintenance refers to the activity of predicting the likelihood of equipment failure in advance by measuring and analyzing equipment performance and operating status at fixed intervals, thereby enabling maintenance to be performed before a failure occurs. Breakdown maintenance refers to maintenance activities performed when facilities or equipment affecting nuclear power, industrial safety, or power plant reliability fail or experience performance degradation. It includes all activities necessary to restore them if they do not meet design, configuration, or performance standards. However, since the aforementioned activities focus on inspecting equipment components, there are significant difficulties in quantitatively verifying utilization and reliability from the perspective of an integrated I&C system. Therefore, it is not possible to maintain I&C facilities and reliability objectives, and to apply reliability enhancement measures that consider failure impact analysis in terms of power plant impact and maintainability aspects while considering the overall I&C architecture. Currently, in the construction phase of domestic nuclear power plants, only the overall I&C utilization rate, MTBF (Mean Time Between Failures), and MTTR (Mean Time To Repair) targets are described during I&C design development, and there is a problem in that there are no practical and specific plans and management activities to satisfy these targets during the operation phase. The IEC International Technical Standard (IEC-60300) requires activities to manage and maintain the reliability of I&C facilities through the concept of a Dependability Program. The New Character Program is defined as a process that manages factors affecting availability—specifically reliability, maintainability, and maintenance support—from the construction phase to the operation and decommissioning phases of a nuclear power plant. It is a program that ensures reliability by instilling confidence in customers and enabling cost-effective operations. Therefore, this invention is proposed as a method to practically implement such a reliability program at power plant sites. For the purpose of reliability management, we propose a method of preparing a Dependability Implementation Plan, performing activities to enhance the reliability of the I&C system based on I&C Architecture through a reliability management system in accordance with the plan, and recording the results of these activities in a reliability management system to maintain and manage reliability goals. FIG. 1 is a diagram showing a personality management procedure using a personality management system according to an embodiment of the present invention. FIG. 2 is an internal module configuration diagram of a new character management system according to an embodiment of the present invention, FIG. 3 is an example diagram of a confirmation and verification module screen of a new character management system according to an embodiment of the present invention, and FIG. 4 is a configuration diagram of a reliability management test facility of a reliability management system according to one embodiment of the present invention. The present invention will be described in more detail below with reference to the drawings. The drawings presented below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Furthermore, throughout the specification, the same reference numerals indicate the same components. It should be noted that the same components in the drawings are indicated by the same reference numerals wh