2016 International Conference on Computer, Mechatronics and Electronic Engineering (CMEE 2016) ISBN: 978-1-60595-406-6
Component Ageing and Life Management Database
Design for Multi-Nuclear-Power-Plant
Da-jian SUN, Xiao-tian LIU, Yan-zhao ZHANG and Wen-xin TI
Suzhou Nuclear Power Research Institute, Suzhou 215004, China
Keywords: Multiple power plant, Multiple equipment, Ageing and life management.
Abstract. According to the requirement of the nuclear power plant ageing management, combined with the nuclear safety guide HAD103/12 “nuclear power plant ageing management" released by NNSA (national nuclear safety administration), this paper introduces the applicable to multiple power plant equipment ageing and life management of the database design requirements, the development process, general structure, composition and function, application scope, maintenance and safety related content.
Backgrounds
Nuclear power plant operation, maintenance need timely, targeted, accurate and complete enough information to make the right decision, the decision to maintain the safety and reliability of the plant whole life period is necessary.
The existing nuclear safety laws and regulations provide the guide to carry out inspection, maintenance and monitoring in service activities records need, also gives the appropriate advice record retrieval and security. However, the current nuclear safety regulations and relevant guides do not cover plant components, systems and structures ageing required detailed enough data and record management.
Nuclear power plant operating experience in recent years shows that now the data may include the basic data (design, manufacturing, equipment quality identification and debugging) and operation history data (running performance, process/system and environmental conditions, etc.) and maintenance historical data. But these data are often not systematic and comprehensive enough or not easily retrieved, hindering the quality trend analysis of components and the remaining service life and performance prediction of components; recognition and evaluation due to ageing effect of performance degradation and failure of components [1].
Purpose
Nuclear safety guide HAD103/12 "Nuclear Power Plant Ageing Management" provides:
Operation of the unit should be according to the ageing management program to establish the corresponding data collection and record keeping system, to promote the implementation and optimization of the ageing management program[2].
Ageing Related Data Acquisition Range
Nuclear power plant SSCs are varied, including structure, pressure equipment, mechanical, electrical, instrumentation and control equipment, etc. The relevant data required by the different types of components had some differences should be carefully identifying, screening the data the part should focus on, ensure the data accuracy and reliability. The required data and records of ageing and life management, in general can be divided into basic data, operation history data and maintenance history data [3][4].
The Design of the Database
On the basis of ageing management data collection and record keeping, nuclear power plant according to the needs of ageing and life management develop SSCs ageing and life management database, through the attention SSCs related data collection, use the basic data, operation history data and maintenance history data as the output, provide good support for ageing and life management.
Database Design Requirements
In order to meet the requirements of nuclear power plant SSCs ageing and life management, ageing and life management database should satisfy the following basic requirements: ensure the whole life period plant data integrity, accuracy, reliability and not easy to lost or damaged. Should guarantee the data information update and be able to flexible management for data and information. Ensure access to the data quickly and accurately. Provide appropriate data analysis, graphical display and report output tools.
Database design points include: unified architecture, integration platform; module design high cohesion and low coupling; guide configuration flexibility, plug-in plug and play; data level access control; standard data interface; equipment information input template; history data import.
Ageing and life management database design follows the advanced, safety, friendly, extensibility, openness and other design principles. Using the .Net Framework 4.0 and SQL SERVER 2012 database, ensure that the build system technology in the short term is never out of season. Fully consider the security mechanism in the process of system development, through the permissions strictly control access to data, by encrypting sensitive data to prevent data leakage, but also has perfect backup and restore functions, prevent loss of data. Concise and relaxed page, reduce user too many steps, giving users the important function page operating hints. By abstracting and inversion of control technology, be convenient to system on the replacement of the database and business adjustment. Easy to build a Web service, provide external system call function of this system.
Database Development Process
Systems development process as shown in figure 1, and generate the corresponding achievements.
The overall Structure of the Database
System functions can be divided into three layers: application function display layer, system and database management layer, data acquisition and basic database layer, as shown in figure 2.
Application function display layers: the main module function of ageing and life management database.
System and database management layer: the system permissions management, data management, automatic report generation and system log management, etc. And the encapsulation, access to the underlying database system for the upper application access database provides a unified access interface.
IAEA guide HAD guide PLant practice
Determine the overall development
plan
Demand analysis
General design
Detailed design
Code complete
Test with data
Software deployment
Unit testing Integration testing Demand analysis
report
General design report
Detailed design report
User manual Beta database
Verify
Overall functional
test
Test records Test records Test records System test report
Making data collection plan
Data collection and management specification
Equipment foundation information
Equipment operation data
Equipment monitoring/ detection data
Equipment maintenance data
Equipment ageing experience feedback
Data collection process management
Development report Equipment related
documents
Plant management activities
Data management activities
[image:3.595.138.459.67.612.2]Internal/external experience feedback
Figure 1 System Development Process.
The Composition and Function of Database
A p p li ca ti o n fu n ct io n d is p la y S y st em a n d d at ab as e m an ag em en t D at a ac q u is it io n an d d at ab as e Login User Information and functionality Database
module function Public function
Rights management Database management Ageing information management System log System management Basic
information Inspection data
Maintenance
data User data
[image:4.595.121.474.69.320.2]Import and export template
Figure 2. System Overall Structure.
Equipment Information Module. Power plant all kinds of information organization and management activities conducted with equipment commonly, the equipment information module provide classification, comb, storage, query, screening, and other functions of equipment information itself, also provide all kinds of relations information composition framework, the realization of ageing experience feedback, equipment documentation, management strategy function of module must be established on the basis of the established corresponding equipment information. Establish unified equipment information module can be used to compare similar equipment differences between different type of reactor and unit, based on the classification of the same information, and by defining different levels of mutual information in information management of the repeated work, improve the efficiency and accuracy.
Database should support: add, modify and delete of units, systems, equipment and components information; the bulk import of equipment or components information; equipment or components for the equipment or systems, and other various dimensions view. Add equipment or components information of database should include basic information, design level, design parameters, etc.; Database should support custom of equipment or components properties.
Equipment Document Module. Establish a device for equipment as an example, from the design, manufacture, operation and so on each stage of the document system, storage the main information of all relevant document, but not to store the document itself, users in the use of the system classification, query and other functions to find the required documents, from power station document by document coding system to obtain the latest version of the document.
Database should support add, modify and delete of equipment document information and the bulk import of equipment documents. Equipment documents are limited to document information maintenance, does not include the actual document.
completely meet the requirement of related work. The module based on the experience of general principles of feedback system, highlights the ageing and life management need for experience feedback, redesign fields and by contact with other modules to strengthen experience feedback information and equipment, the material, the ageing mechanism of contact, make ageing related experience feedback information better service in the ageing and life management.
Database should support add, modify, delete and update of experience feedback, the bulk import of experience feedback and the upload of familiar documents and pictures include word, PDF, etc.
Management Strategy Module. Reflect the overall power plant from the aspects of equipment management of the ageing and life management strategy and the detailed content, to provide a term used to describe any management activities of all relevant elements of the storage, query, classification function, clear the purpose of management activities, effect and related power plant program files; Establish the relationship between management object, activity sources and activities data.
Database should support add, modify and delete of ageing management strategy, the bulk import of ageing management strategy, and ageing management strategies associated with ageing data.
Ageing Data Module. Provide ageing related all kinds of inspection and monitoring of data storage, management, query, statistics, and equipment information module and specific management activities (management strategy module), the user can easily from the angle of the equipment ageing mechanism or angle of other access to management activities data, to track and analyze, its support based on the data of equipment state and life assessment.
Database should support add, modify and delete of ageing data; Database should support the bulk import of ageing data; Database should support the upload of data files.
Equipment Information Summary. Database should support provides all unity of the current equipment or components, including experience feedback, equipment document, ageing strategy, ageing data, ageing evaluation status, life evaluation results and informative messages, etc.
The Application Range of the Database and the Matters Needing Attention
Database established in order to provide data for the following activities:
Identification and evaluation of components performance degradation and failure caused by ageing effect; determine the type and timing of the maintenance activities (including the calibration, repair, refurbishment and replacement of equipment); optimizing operation condition and operation, in order to reduce equipment ageing degradation; timely identify new ageing effect, avoid endanger the safety of nuclear power plant, reduce the operation reliability and lifetime of the nuclear power plant.
Ageing and life management database collect only ageing related information, events and inspection activities, the ageing not related information (such as: human factor) are not included in the database.
The Database Maintenance
As the nuclear power plant operation and work of ageing and life management, update and supplement the relevant information. And regularly or not regularly check to the information in the database, and to evaluate the document management process, ensure normal database management process and meet the demand of the ageing and life management.
Shall specify the specific requirements of nuclear power plant ageing and life management database, to ensure that the synchronous initiation of ageing and life management database establishment and ageing and life management implementation, check and acceptance, and real-time follow up in the ageing and life management, ensure the ageing and life management database information complete and accurate.
The Safety of the Database
Measures for the maintenance of the database security usually include:
external personnel); take measures to prevent unauthorized operation and casual damage to the database, for example, using the database separately from the main database, the database is under the control of the user; protect the data, to prevent data loss due to fire, computer crashed, or other events. To this end, at least for a copy of the data file and put it on the effectively control area. These safety measures should not restrict user access to the data, and should support them to the normal use of the data [5].
Conclusion
Established multiple power plant component ageing and life management database to store ageing related data for power plant and for subsequent ageing related work provides an important role, at the same time for multiple same equipment ageing related data contrast between power plant also provides a convenient functions, for power plant to carry out the ageing and life management work provides a very good tool.
Reference
[1] NNSA. HAF.JXXXX, Ageing nuclear power plant management of data collection and record keeping[S], 2010.
[2] NNSA. HAD103/12, Ageing nuclear power plant management[S], 2012.
[3] IAEA Safety Series NO.50-P-3, Plant ageing management of data collection and record keeping[S], 1991.
[4] IAEA Safety Standards Series No.NS-G-2.12, Ageing Management for Nuclear Power Plants[S], 2009.
