• Title/Summary/Keyword: integrated verification facility

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Design and Implementation of Integrated Verification Facility for Satellite Flight Software (위성비행소프트웨어 통합검증환경의 설계 및 구축)

  • Shin, Hyun-Kyu;Lee, Jae-Seung;Choi, Jong-Wook;Cheon, Yee-Jin
    • Aerospace Engineering and Technology
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    • v.11 no.1
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    • pp.49-56
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    • 2012
  • The flight software monitors the status of the satellite and performs attitude control and its own mission. Due to the operating environments and its uniqueness, the high level of reliability is required for the flight software. To this end, a variety of activities to meet the given requirements and improve the safety and reliability are made during the development of flight software. A variety of development environments should be provided to support execution of flight software on hardware or satellite simulator and dynamic verification of flight software through command/telemetry interface. The satellite flight software team has been developing the IVF to be applied to various satellite projects more effectively and to improve the reliability of flight software. In this paper, the design and configuration method of IVF for the effective verification of flight software is introduced.

Software Verification & Validation for Digital Reactor Protection System (디지털 원자로 보호계통의 소프트웨어 확인 및 검증)

  • Park, Gee-Yong;Kwon, Kee-Choon
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.185-187
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    • 2005
  • The reactor protection system is the most important function for the safe operation of nuclear powerplants (NPPs) in that such system protects a nuclear reactor tore whose damage can cause an enormous disaster to the nuclear facility and the public. A digital reactor protection system (DRPS) is being developed in KAERI for use in the newly-constructed NPPs and also for replacing the existing analog-type reactor Protection systems. In this paper, an software verification and validation (V&V) activities for DRPS, which are independent of the DRPS development processes, are described according to the software development life cycle. The main activities of DRPS V&V processes are the software planning documentations, the verification of software requirements specification (SRS) and software design specification (SDS), the verification of codes, the tests of the integrated software and system. Moreover, the software safety analysis and the software configuration management are involved in the DRPS V&V processes. All of the V&V activities are described, in detail, in this paper.

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Experimental Study on Design Verification of New Concept for Integral Reactor Safety System (일체형원자로의 신개념 안전계통 실증을 위한 실험적 연구)

  • Chung, Moon-Ki;Choi, Ki-Yong;Park, Hyun-Sik;Cho, Seok;Park, Choon-Kyung;Lee, Sung-Jae;Song, Chul-Hwa
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.2053-2058
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    • 2004
  • The pressurized light water cooled, medium power (330 MWt) SMART (System-integrated Modular Advanced ReacTor) has been under development at KAERI for a dual purpose : seawater desalination and electricity generation. The SMART design verification phase was followed to conduct various separate effects tests and comprehensive integral effect tests. The high temperature / high pressure thermal-hydraulic test facility, VISTA(Experimental Verification by Integral Simulation of Transient and Accidents) has been constructed to simulate the SMART-P (the one fifth scaled pilot plant) by KAERI. Experimental tests have been performed to investigate the thermal-hydraulic dynamic characteristics of the primary and the secondary systems. Heat transfer characteristics and natural circulation performance of the PRHRS (Passive Residual Heat Removal System) of SMART-P were also investigated using the VISTA facility. The coolant flows steadily in the natural circulation loop which is composed of the steam generator (SG) primary side, the secondary system, and the PRHRS. The heat transfers through the PRHRS heat exchanger and ECT are sufficient enough to enable the natural circulation of the coolant.

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Development of an Integrated Monitoring System for the Low and Intermediate Level Radioactive Waste Near-surface Disposal Facility (방사성폐기물 표층처분시설 통합 모니터링 시스템 개발)

  • Se-Ho Choi;HyunGoo Kang;MiJin Kwon;Jae-Chul Ha
    • Journal of Radiation Industry
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    • v.17 no.4
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    • pp.359-367
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    • 2023
  • In this study, the function and purpose of the disposal cover, which is an engineering barrier installed to isolate the disposal vault of the near-surface disposal facility for radioactive waste from natural/man-made intrusion, and the design details of the demonstration facility for performance verification were described. The Demonstration facility was designed in a partially divided form to secure the efficiency of measurement while being the same as the actual size of the surface disposal facility to be built in the Intermediate & low-level radioactive waste disposal site of the Korea Radioactive Waste Agency (KORAD). The instruments used for measurement consist of a multi-point thermometer, FDR (Frequency Domain Reflectometry) sensor, inclinometer, acoustic sensor, flow meter, and meteorological observer. It is used as input data for the monitoring system. The 3D monitoring system was composed of 5 layers using the e-government standard framework, and was developed based on 4 components: screen, control module, service module, and DBIO(DataBase Input Output) module, and connected them to system operation. The monitoring system can provide real-time information on physical changes in the demonstration facility through the collection, analysis, storage, and visualization processes.

Contribution of thermal-hydraulic validation tests to the standard design approval of SMART

  • Park, Hyun-Sik;Kwon, Tae-Soon;Moon, Sang-Ki;Cho, Seok;Euh, Dong-Jin;Yi, Sung-Jae
    • Nuclear Engineering and Technology
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    • v.49 no.7
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    • pp.1537-1546
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    • 2017
  • Many thermal-hydraulic tests have been conducted at the Korea Atomic Energy Research Institute for verification of the SMART (System-integrated Modular Advanced ReacTor) design, the standard design approval of which was issued by the Korean regulatory body. In this paper, the contributions of these tests to the standard design approval of SMART are discussed. First, an integral effect test facility named VISTA-ITL (Experimental Verification by Integral Simulation of Transients and Accidents-Integral Test Loop) has been utilized to assess the TASS/SMR-S (Transient and Set-point Simulation/Small and Medium) safety analysis code and confirm its conservatism, to support standard design approval, and to construct a database for the SMART design optimization. In addition, many separate effect tests have been performed. The reactor internal flow test has been conducted using the SCOP (SMART COre flow distribution and Pressure drop test) facility to evaluate the reactor internal flow and pressure distributions. An ECC (Emergency Core Coolant) performance test has been carried out using the SWAT (SMART ECC Water Asymmetric Two-phase choking test) facility to evaluate the safety injection performance and to validate the thermal-hydraulic model used in the safety analysis code. The Freon CHF (Critical Heat Flux) test has been performed using the FTHEL (Freon Thermal Hydraulic Experimental Loop) facility to construct a database from the $5{\times}5$ rod bundle Freon CHF tests and to evaluate the DNBR (Departure from Nucleate Boiling Ratio) model in the safety analysis and core design codes. These test results were used for standard design approval of SMART to verify its design bases, design tools, and analysis methodology.

A Railway Safety Proposal with Full System Commissioning (철도시스템의 종합시험운행을 통한 철도안전 확보방안)

  • Kim, Jeong-Joo;Lee, Hi-Sung;Moon, Dae-Seop
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.522-527
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    • 2005
  • Rail network authority have to do the safety ensuring activities including the maintenance of railway facility, integrated performance verification between the facilities and related rolling stock and safety inspections, etc. When constructing the new lines or revising the conventional lines, full system commissioning should be done before the revenue service with railway operator. To develop the optimal full system commissioning model, the status of domestic and foreign railway facility and railway accidents are analysed and the problems of the safety management are derived. As one of countermeasures for the problems, the procedures and criteria for the full system commissioning are developed.

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Multi-body dynamics model for spent nuclear fuel transportation system under normal transport test conditions

  • Seongji Han;Gil-Eon Jeong;Hyeonbeen Lee;Woo-Seok Choi;Jin-Gyun Kim
    • Nuclear Engineering and Technology
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    • v.55 no.11
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    • pp.4125-4133
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    • 2023
  • The transportation of spent nuclear fuel is an important process that involves road and sea transport from an interim storage facility to storage and final disposal sites. As spent nuclear fuel poses a significant risk, carefully evaluating its vibration and shock characteristics under normal transport conditions is essential. In this regard, full-scale multi-modal transport tests (MMTT) have been conducted domestically and internationally. In this paper, we discuss the process of developing a multi-body dynamics (MBD) model to analytically simulate conditions that cannot be considered in tests. The MBD model is based on the KORAD-21 transportation system was validated using the Korean MMTT results from 2020 to 2021. This paper summarizes the details of the development and verification of the MBD model for the KORAD-21 transportation system under normal transport test conditions. This approach can be applicable to various transportation scenarios and systems, and the results of this study will help to ensure that nuclear fuel transportation is conducted safely and effectively.

Critical Factors Influencing on the Level of Service for Proactive Maintenance in Educational Facilities (교육 시설물의 선제적 노후화 관리를 위한 유지관리 서비스 수준의 인지요인 도출)

  • Shin, SeungWoo;Yi, JuneSeong;Son, JeongWook
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.3
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    • pp.24-35
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    • 2015
  • Aging educational facility shall be managed and maintained through integrated service perspectives, in consideration of functions of each facility to provide safe and comfortable environment, rather than temporarily fixing/repairing problems. For doing this, it is a must to firstly understand the limitation of highly biased performance-based maintenance practice, which is a most common type applied at present, and therefore to establish maintenance system that reflects the functions and characteristics of maintenance service that a facility was designed with. Therefore, the objective of this study is to find items that have an influence on service level recognition in order to fairly evaluate service functions of educational facilities, and subsequently to use these factors as ingredients of establishing a consistent and efficient maintenance system. Therefore this study proposed explanatory variables to measure influential factors for each major maintenance category. Then appropriate statistical verification was carried out on questionnaires that collected from a number of industry experts to test its fe asibility.

A Study on the Implementation of the Integrated Information System for Emergency Handling in Multi-modal Transfer Stations (복합형 환승센터에서의 상황대응을 위한 통합정보시스템 구축에 관한 연구)

  • Kim, Hyun-Tae;Han, Jeong-Hun;Jang, Bong-Seob;Kim, Hwang-Bae
    • Journal of Korean Society for Geospatial Information Science
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    • v.16 no.3
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    • pp.87-94
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    • 2008
  • In this study, deals with selection of monitoring objects to handle emergency cases of multi-modal transfer stations and information required for emergency surveillance, recognition, verification, propagation, processing and situation closing. Furthermore, this article suggests integrated management scheme for the above information and methods which offer appropriate information required for situation handling decisions at each stage of situation changes. The transfer station which consists of facilities, passengers, and transportations has limitations in required monitoring information. So, for the situation recognition and handling strategy, case-based reasoning of the expert system was used to apply experience, knowledge, and past cases of situation handling experts. The article also suggests methods to control facilities which are operated at transfer stations and these methods can minimize spatial confusions and damages at the emergency situation. The real time situation information will be shared by proper facility controls to support services from external institutions.

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Conceptual Design of Intelligent Building Automation System Using Computer-Aided Systems Engineering Approach (시스템공학 접근법을 이용한 지능형 건물 자동화 시스템의 개념설계)

  • 유일상;박영원
    • Journal of the Korea Institute of Military Science and Technology
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    • v.3 no.2
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    • pp.166-178
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    • 2000
  • As the 21st century signifies an information-oriented society, the computer integration takes place in all walks of human presence. Needs for computer and network-integrated automation present new challenges in military as well as commercial facility systems engineering. Since the first intelligent building appeared in USA in 1984, it gradually became an essential capability for the building industry requirement these days. Intelligent Building System(IBS) is evolving to be very complex because there are many subsystems such as telecommunication(TC), office automation(OA), building automation(BA), security, construction environments, etc. During the planing phase of IBS development, therefore, a disciplined systems engineering must be performed to analyze stake- holder's requirements to build an optimized system while minimizing trial-and-error expenses and risks. This paper presents a conceptual design of BAS applying systems engineering methods. The contribution of this study includes the development of IBS subsystem specification for building automation subsystem, which is a part of IBS, using the methodology of requirement analysis, functional analysis, synthesis, and verification. A computer-aided systems engineering s/w, RDD-100, was used to improve the system design efficiency and to promote the product design knowledge management for reuse in later design programs.

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