JP2007265112A - Maintenance support method and its device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily input a determination factor of the importance level of an apparatus installed in a nuclear power plant or the like for selecting the optimum maintenance method systematically, comprehensively and efficiently, and to mechanically output a determination result. <P>SOLUTION: This maintenance support method comprises a system/apparatus importance level displaying procedure of displaying, in a table form, the system/apparatus importance level information stored in an importance level database 2 of safety function, an importance level database 4 of supply function, and safety regulation database 6, a system diagram display procedure of displaying system diagram information stored in a CAD database 8, and an apparatus importance level display procedure of displaying, via the CAD database 8, the importance level information on the apparatus by selecting a system/apparatus displayed in the tabular form on the system diagram. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a maintenance support method and apparatus capable of evaluating the importance of equipment installed in a nuclear power plant and the like and selecting an optimum maintenance method according to the importance.

  Periodic inspections of nuclear power plants in Japan undergo inspections, maintenance work, fuel replacement, etc. in accordance with the contents stipulated in periodic inspections and periodic operator inspections after the reactors are opened and restored. In addition, equipment repairs and remodeling work for the purpose of renewing deterioration, etc. are being carried out. In many of the inspections and maintenance work of the equipment, time-planned maintenance that is performed every preset period is mainly applied.

  On the other hand, at nuclear power plants outside Japan, the status of equipment is monitored and maintenance is performed in accordance with the status, post-conservation maintenance that is performed when equipment fails, and without stopping the power station. Maintenance methods according to the importance of the equipment, such as maintenance during plant operation for equipment maintenance, are adopted.

  On the other hand, “Nuclear Power Station Maintenance Management Rules (JEAC4209)” has been established in Japan, and “Maintenance Management According to Importance (MR-2400)” defines the importance of maintenance management according to the importance. It is known that maintenance management has been required, and in “Draft Inspection Plan (MR-4300)”, it has been allowed to select and formulate maintenance methods from various maintenance methods. (For example, refer nonpatent literature 1).

  In view of such circumstances, in future nuclear power plant maintenance activities, a method for easily selecting an optimal maintenance method is required in consideration of the importance and risk of the equipment. There is also a need for a system that converts them into electronic data and manages them more efficiently and easily.

  Although there are concepts such as the importance and risk of the equipment installed in the nuclear power plants mentioned above, the definition is limited or ambiguous, or an appropriate method is selected from various maintenance methods. Even if a selection is made, the selection criteria are not always clear. As mentioned above, in order to specifically promote optimization of maintenance activities, it has not reached sufficient technology, but the importance of equipment installed at nuclear power plants, etc. is evaluated and The selection of the most appropriate maintenance method is being studied as shown in the six examples below.

  As one example, a “plant maintenance support device” is known (see, for example, Patent Document 1). This “plant maintenance support device” calculates the expected loss value from the probability of an event leading to a major accident (safety) and the probability of an event leading to plant shutdown (operating rate), and is optimally compared with the cost of the maintenance method This is a system for selecting a proper maintenance method.

  Secondly, “a support method and apparatus for facility repair planning work” is known (for example, see Patent Document 2). This “support method and equipment for facility repair planning work” evaluates the importance of the above equipment on a risk matrix set in advance based on the life evaluation of each equipment of the plant, and performs comparative examination between facilities or between plants. A method and apparatus for preparing a repair plan from

  Thirdly, an “equipment maintenance optimization system” is known (see, for example, Patent Document 3). This "Equipment Maintenance Optimization System" is a means to analyze and evaluate material deterioration / corrosion tendency, etc. against aging deterioration of plant equipment materials, and to quantitatively evaluate the effects of equipment failures. The maintenance location is optimized based on the means of identifying the maintenance location based on this, and setting the frequency of occurrence of the failure using the impact assessment method and the impact caused by the failure (frequency * impact). System.

  A fourth method is known as “plant equipment maintenance management method and apparatus” (for example, see Patent Document 4). This "plant equipment maintenance management method and apparatus" includes inspection information and operation history information input means for equipment constituting a plant, failure development means for analyzing a failure assumed from an inspection event, Failure function calculation means for calculating the unreliability of items, failure recovery expected cumulative cost calculation means for multiplying each unreliability and the cost required to recover the above events, and adding them according to the failure association development, and this failure phenomenon A method and apparatus for determining maintenance management time and method by comparing preventive maintenance cost and expected failure recovery cumulative cost, having preventive maintenance cost calculation means for calculating preventive maintenance cost for preventing .

  The fifth is known as “Examination Guidelines for Importance Classification of Safety Functions of Light Water Reactor Facilities for Power Generation” (see Non-Patent Document 2, for example). This “Guidelines for Reviewing the Classification of Safety Functions of Light Water Reactor Facilities for Power Generation” defines two safety functions for light water reactor facilities for power generation: prevention of abnormalities and mitigation of abnormal effects. The functions are classified into class 1 to class 3 importance, and the reliability and maintenance of the equipment according to each class are required. This guideline is aimed at ensuring the safety of nuclear reactor facilities, and does not have any particular viewpoint from the availability factor and the reliability of power supply.

Sixth, “Future study policy regarding inspection system” is known (for example, see Non-Patent Document 3). This “Future Study Policy on Inspection Systems” summarizes the thoughts of the administrative agency on the future state of inspection systems for nuclear power generation facilities. There is a policy to use risk information and power plant performance information as a reference for inspection of nuclear power facilities.
Japanese Patent No. 3054039 JP 2002-297709 A JP 2002-123314 A JP 2003-303014 A "Maintenance management according to importance (MR-2400)" and "Draft inspection plan (MR-4300)" in "Nuclear Power Station Maintenance Management Regulations (JEAC4209)", NEC Corporation, 2003 “Examination Guidelines for Importance Classification of Safety Functions of Light Water Reactor Facilities for Power Generation”, Nuclear Safety Commission, August 30, 1990 "Future study policy on inspection system" Ministry of Economy, Trade and Industry, General Resource and Energy Study Group Nuclear Safety and Security Committee (18th), June 14, 2004

  As described above, in the current maintenance activities of nuclear power plants in Japan, inspection and maintenance work of equipment and equipment is performed mainly with time-planned maintenance. On the other hand, if the deterioration / failure characteristics of the equipment / equipment are known to have a certain level of so-called wear-fault distribution characteristics that result in loss of function at some point in time with age and frequency of use, loss of function (generally It is said that the maintenance method (maximum effect) can be obtained by performing maintenance immediately (periodically shorter than the service life) immediately before the failure and the service life.

  However, in general, there are only a few facility devices having such characteristics, and there is a problem in that selective application is important because there is no effect in applying time-planned maintenance to all devices.

  In addition, even when the equipment is operating normally, there is a possibility that it may increase unnecessary risks such as assembly failure or characteristic change (removal of familiarity) because it is periodically disassembled and inspected. was there.

  For this purpose, appropriate maintenance according to the importance of equipment from various maintenance methods (combination with time-planned maintenance, condition monitoring maintenance, post-maintenance, and in-service maintenance) from maintenance activities centered on time-planned maintenance. There was a problem that maintenance activities were required to select and construct a proper maintenance method.

  The present invention has been made to solve the above problems, and in order to systematically, comprehensively and efficiently select an optimal maintenance method, determination of the importance of equipment installed in a nuclear power plant or the like. It is an object of the present invention to provide a maintenance support method and apparatus capable of easily inputting elements and further outputting a determination result mechanically.

  In order to achieve the above object, in the maintenance support method of the present invention, the importance information of the system / equipment stored in the safety function importance database, the supply function importance database, and the safety regulation database is displayed in a table format. System / equipment importance display procedure, system diagram display procedure for displaying system diagram information stored in the CAD database, and by selecting the system / device displayed in the table format on the system diagram The device importance level display procedure for displaying the importance level information of the device via the CAD database.

  In order to achieve the above object, in the maintenance support device of the present invention, the importance information of the system / equipment stored in the importance database of the safety function, the importance database of the supply function, and the safety regulation database is input. System / equipment importance input / output means, system diagram input / output means for inputting system diagram information stored in the CAD database, and systems / outputs output from the system / apparatus importance input / output means and displayed in a table format System / equipment importance display means for displaying importance of the system / equipment via the CAD database by selecting equipment importance information and system diagram information output from the system diagram input / output means, It is characterized by having.

  According to the maintenance support method and apparatus of the present invention, the importance evaluation of facilities / equipment is systematically and comprehensively selected by selecting the importance information and system diagram information of the system / equipment displayed in a table format. And can be performed efficiently.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a maintenance support apparatus and method according to the present invention will be described with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

  FIG. 1 is a block diagram showing a configuration of a maintenance support method and apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a detailed configuration of a data input / display unit in FIG.

  As shown in FIGS. 1 and 2, the maintenance support apparatus 11 includes a database input / output unit 7 that is a system / equipment importance input / output unit that displays the importance of the system / equipment in a table format, and a system diagram input / output unit. And a CAD data input / output unit 9.

  On the other hand, safety function importance level information created based on the safety function importance level classification examination guideline 1 is stored in the safety function importance level database 2. Importance information on the supply function created based on the importance 3 relating to supply reliability is stored in the importance database 4 of the supply function. In addition, safety regulation information created based on the reactor facility safety regulations 5 is stored in the safety regulation database 6.

  The above-mentioned database input / output unit 7 receives the importance information of the system / equipment stored in the importance database 2 of the safety function, the importance database 4 of the supply function, and the safety regulation database 6, and the data The data is output to the input / display unit 10.

  In this data input / display unit 10, the safety function importance database 2, the supply function importance database 4 and the safety regulation database 6 input from the database input / output unit 7 are related to the importance of the system / equipment. Information is displayed as a database list 12 in a table format.

  On the other hand, the system diagram information stored in the CAD system 8 is input to the CAD data input / output unit 9 and is output to the data input / display unit 10.

  In the data input / display unit 10, the system diagram information input from the CAD data input / output unit 9 is displayed as a design drawing 13 in a table format.

  In the data input / display unit 10, after selecting the system / device displayed in the database list 12, the device represented in the design drawing 13 is selected. Through this selection, the importance information of the system / device selected in the database list 12 is output to the CAD data input / output unit 9.

  The CAD data input / output unit 9 outputs the importance information of the system / device input from the data input / display unit 10 to the CAD system 8. In the CAD system 8, the importance level information is stored as system / equipment attribute information. Further, the CAD system 8 outputs the inputted importance information and the system diagram to the CAD data input / output unit 9. Importance information and system diagram information of the system / equipment input to the CAD data input / output unit 9 are output to the data input / display unit 10, and the system / equipment is color-coded according to importance. Can do.

  According to the present embodiment, it is possible to easily input the importance information of the system / device displayed in the table format to the CAD system via the system diagram. For this reason, it is possible to easily input an element for determining the importance of equipment installed in a nuclear power plant or the like, and to output a determination result mechanically. Thus, it is possible to visually confirm the importance from the system diagram together with the importance information of the input system / equipment, and to select the optimal maintenance method systematically, comprehensively and efficiently. Can do. Furthermore, the accountability of the correctness and validity related to the selection of the maintenance method can be fulfilled and the cost can be reduced.

  Next, a maintenance support method and apparatus according to another embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, in the design drawing 13 of the data input / display unit 10 described above, connection parts of devices having different importance levels are extracted, and the higher importance level is determined by damage or failure of the lower level importance level devices. Judgment is made as to whether or not this equipment will be affected. When there is an influence, the importance of the lower importance device is treated as equivalent to the importance of the higher importance device. Information treated as having the same importance is output to the database input / output unit 7 and the CAD data input / output unit 9.

  Information relating to importance update in the database input / output unit 7 is output to the safety function importance database 2 and the supply function importance database 4, and the importance information is updated. Information relating to the importance update in the CAD data input / output unit 9 is output to the CAD system 8, and the importance information of the related device is updated. At this time, the updated importance can be identified by changing the color classification.

  According to the present embodiment, it is possible to confirm on the system diagram the influence evaluation at the connection parts of devices having different importance levels, and it is possible to update the database information along with the importance level update. Furthermore, the accountability of the correctness and validity related to the selection of the maintenance method can be fulfilled and the cost can be reduced.

  FIG. 3 is a configuration diagram showing the creation of a database of safety function importance classification examination guidelines in FIG.

  As shown in FIG. 3, the safety function importance database 2 is, for example, a safety function described in “Examination Guidelines for Safety Function Importance Classification of Light Water Reactor Facilities for Power Generation” shown in Non-Patent Document 2. It is constructed based on the examination guideline 1 regarding the importance classification. In particular, the information related to the safety function importance level classification information 15 described in the examination guideline 1 regarding the safety function importance level classification is used. The safety function importance classification information 15 includes information such as safety function name, structure / system / equipment name, safety function classification (PS / MS), importance classification (class 1, 2, 3), etc. included. Further, the plant information 16 corresponding to the safety function importance level classification 15 is added. The plant information 16 includes names of structures, systems, and equipment.

  In the present embodiment, the safety function importance database 2 is tabulated with information related to safety function importance classification information 15, plant information 16, and the like described in the examination guideline 1 regarding safety function importance classification. It builds importance information on safety functions.

  According to the present embodiment, the safety function importance necessary for the safety function importance determination can be easily created based on the examination guideline 1 regarding the safety function importance classification. Furthermore, the safety function importance information stored in the database can quickly provide information necessary for determining the importance of the safety function.

  FIG. 4 is a configuration diagram showing the creation of a database of importance related to the supply reliability of FIG.

  As shown in FIG. 4, the database 4 of the importance level of the supply function is, for example, “maintenance management according to importance level (MR)” of “Nuclear Power Station Maintenance Management Regulations (JEAC4209-2003)” shown in Non-Patent Document 1. -2400) ”is constructed based on the importance classification 3 of the supply function by the business operator prepared in accordance with the provision of“ importance relating to supply reliability ”. In particular, information related to the supply function importance level classification 19 described in the supply function importance level classification 3 by the operator is used. The importance level classification 19 of the supply function includes information such as the name of the safety function, the name of the structure / system / equipment, and the importance level classification (classes 1, 2, 3). Furthermore, the plant information 20 corresponding to the importance classification 19 of the supply function is added. The plant information 20 includes names of structures, systems, and equipment.

  In the present embodiment, the supply function importance level database 4 includes information related to the supply function importance level classification 19 described in the maintenance management (MR-2400) 3 in a tabular format and supply function importance level information. Is to build.

  According to the present embodiment, it is possible to easily create the supply function importance necessary for determining the supply function importance. Thus, information necessary for determining the importance of the supply function can be quickly provided by the supply function importance information stored in the database. Furthermore, the cost for selecting a maintenance method can be reduced.

  FIG. 5 is a block diagram showing the creation of a database of the reactor facility security regulations of FIG.

  As shown in FIG. 5, the safety regulation database 6 is created in accordance with the clauses related to Section 3 “Restrictions on Operation” of “Nuclear Power Station Maintenance Management Regulations (JEAC4209)” shown in Non-Patent Document 1, for example. It is constructed based on the Reactor Facility Maintenance Regulation 5 which is each operation restriction condition. In particular, the information related to the maintenance regulations 23 described in the nuclear reactor maintenance regulations 5 is used. The maintenance rule information 23 includes information such as article number, operation restriction condition, required action, time required for the action (hereinafter referred to as AOT), total time of AOT, and the like. Furthermore, the plant equipment information 24 corresponding to the safety regulation information 23 is added. The plant equipment information 24 includes information on severeness for completing the measure, equipment corresponding to the plant, and the like.

  In the present embodiment, the safety regulation database 6 is for constructing safety regulation information in the form of a table of information related to the maintenance regulations information 23, the plant equipment information 24, etc. described in the reactor facility maintenance regulations 5. .

  According to the present embodiment, it is possible to easily retrieve the relevant security provision clause and AOT from the device information. Thus, even when the vehicle deviates from the operation restriction condition, it becomes possible to grasp the severity for completing the measure and confirm the importance in the safety regulations. Furthermore, the cost for selecting a maintenance method can be reduced.

  Here, the maintenance plan will be described.

  The maintenance support apparatus 11 in FIG. 1 further includes a device search unit (not shown) that searches for devices corresponding to the importance of the safety function and the importance of the supply function that are the targets of any maintenance plan. The importance information extracted from the retrieved safety function importance database 2 and supply function importance database 4 is displayed as a list on the data input / display unit 10.

In addition, a human interface (not shown) for realizing the function of outputting the list information is provided.

  According to the present embodiment, when performing a maintenance plan, it is possible to instantly search for a device corresponding to the maintenance plan, and it is possible to support a risk-based maintenance plan reflecting the importance. In addition, it is possible to fulfill the accountability of the correctness and validity related to the selection of the maintenance method and to reduce the cost.

  Further, the present invention is not limited to the above-described embodiments, and the system / equipment importance level display for displaying the importance levels of the system / equipment in a tabular format in a plurality of independent maintenance support apparatuses 11. The database input / output unit 7 as the output means and the CAD data input / output unit 9 as the system diagram input / output means may be provided separately, and various modifications can be made without departing from the gist of the present invention. Can do.

The block diagram which shows the structure of the maintenance assistance method and its apparatus of embodiment of this invention. The block diagram which shows the detailed structure of the data input / display part of FIG. The block diagram which shows the database preparation of the importance classification examination guideline of the safety function of FIG. FIG. 3 is a configuration diagram showing a database of importance levels related to supply reliability in FIG. 1. The block diagram which shows the database formation of the nuclear reactor facility security regulation of FIG.

Explanation of symbols

  1 ... Safety Function Importance Classification Review Guidelines, 2 ... Safety Function Importance Database, 3 ... Supply Reliability Importance, 4 ... Supply Function Importance Database, 5 ... Reactor Facility Safety Regulations, 6 ... Safety Specified database, 7 ... Database input / output unit, 8 ... CAD system, 9 ... CAD data input / output unit, 10 ... Data input / display unit, 11 ... Maintenance support device, 12 ... Database list, 13 ... Design drawing, DESCRIPTION OF SYMBOLS 15 ... Safety function importance classification, 16 ... Plant structure, system and equipment, 19 ... Supply function importance classification, 20 ... Plant structure, system and equipment, 23 ... Safety regulation information, 24 ... Plant equipment information.

Claims (7)

The system / equipment importance display procedure for displaying the importance information of the system / equipment stored in the safety function importance database, supply function importance database and safety regulation database in a table format,
A system diagram display procedure for displaying system diagram information stored in the CAD database;
A device importance display procedure in which importance information of the device is displayed via the CAD database by selecting a system / device related to the importance information displayed in the table format on the system diagram;
A maintenance support method characterized by comprising:   When the system / equipment importance display procedure affects devices of higher importance due to damage or failure of the lower importance equipment when devices of different importance are connected on the system diagram, The maintenance support method according to claim 1, further comprising a procedure for handling the importance of the lower importance device as being equivalent to the importance of the higher importance device.   The safety function importance database is used to evaluate the importance of safety functions of systems and devices in nuclear power plants based on the “Examination Guidelines on Safety Function Importance Classification of Light Water Reactor Facilities for Power Generation”. The maintenance function according to claim 1, further comprising safety function importance information constructed by clarifying the most important function of the system / equipment by collecting the evaluation results for each device. Support method.   The supply function importance database is based on the provisions concerning the “importance related to supply reliability” defined in “maintenance management according to importance” of “maintenance management regulations for nuclear power plants”. Importance information on the supply function constructed by clarifying the most important functions of the system / equipment by evaluating the importance of the supply reliability of the equipment, and further collecting the evaluation results for each system / equipment The maintenance support method according to claim 1, further comprising:   The safety regulation database extracts systems / equipment that may be a factor leading to a shift outside the operational restrictions stipulated in the “Operating Restrictions” section of the “Reactor Facility Safety Regulations”. The importance of supply reliability is evaluated from the ease of measures required for transition outside the operational limits for each system / equipment and the length of time for completing the measures, and this evaluation is performed for each system / device. The maintenance support method according to claim 1, further comprising security regulation information constructed by clarifying a function having the highest importance of the system / equipment by collecting results.   A device search procedure for searching for a device corresponding to an arbitrary maintenance method when making a maintenance plan, a list display procedure for displaying a list of the searched devices, and a human interface for realizing a procedure for outputting the list information; The maintenance support method according to claim 1, further comprising: System / equipment importance input / output means to which the importance information of the system / equipment stored in the safety function importance database, the supply function importance database and the safety regulation database is input,
System diagram input / output means for inputting system diagram information stored in the CAD database;
By selecting the importance information of the system / equipment output from the system / equipment importance input / output means and displayed in a table format and the system diagram information output from the system diagram input / output means via the CAD database System / equipment importance display means for displaying the importance of the system / equipment;
A maintenance support apparatus characterized by comprising:

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