• 플랜트 저널
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• 제13권4호
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• pp.41-47
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• 2017

본 논문은 해양플랜트 입찰단계에서 시스템엔지니어링(Systems Engineering)기법을 이용하여 해양플랜트를 구성하고 있는 장비 배치를 검증(Verification)할 수 있는 검증수행모델에 대한 연구이다. 해양플랜트 상부구조물(Topside) 유지보수 장비들을 엔지니어링하기 위하여는 Topside 장비 Layout검증이 선행되어야 한다. 하지만 입찰단계에서 완성도가 높지않는 FEED(Front End Engineering Design)결과물로 인한 많은 오류가 존재함에도 불구하고 검토시간의 부족 등의 이유로 검증을 수행하지 못하는 경우가 존재한다. 따라서 본 논문에서는 다학제간 접근방식인 시스템엔지니어링 프로세스를 간략화하여 적용함으로써 제한된 시간내 효과적으로 장비배치를 검증할 수 있는 검증수행모델을 제안하였다. 모델의 구성은 기능전개모델(Functional Deployment Model)을 통하여 구축하였으며 사례연구를 통하여 본 Topside 장비 배치에 대한 검증 수행모델을 검증하였다.

• Nuclear Engineering and Technology
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• 제53권2호
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• pp.455-465
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• 2021

The Molten Salt Reactor (MSR), one of the six advanced reactor types of the 4th generation nuclear energy systems, has many impressive features including economic advantages, inherent safety and nuclear non-proliferation. This paper introduces a system analysis code named TREND, which is developed and used for the steady and transient simulation of MSRs. The TREND code calculates the distributions of pressure, velocity and temperature of single-phase flows by solving the conservation equations of mass, momentum and energy, along with a fluid state equation. Heat structures coupled with the fluid dynamics model is sufficient to meet the demands of modeling MSR system-level thermal-hydraulics. The core power is based on the point reactor neutron kinetics model calculated by the typical Runge-Kutta method. An incremental PID controller is inserted to adjust the operation behaviors. The verification and validation of the TREND code have been carried out in two aspects: detailed code-to-code comparison with established thermal-hydraulic system codes such as RELAP5, and validation with the experimental data from MSRE and the CIET facility (the University of California, Berkeley's Compact Integral Effects Test facility).The results indicate that TREND can be used in analyzing the transient behaviors of MSRs and will be improved by validating with more experimental results with the support of SINAP.

• 대한인간공학회지
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• 제18권3호
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• pp.153-169
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• 1999

The design of nuclear control room is advancing toward totally computer based human system interfaces (HSI). Computer based interfaces offer the opportunity to provide improved support of operator performance, but if not properly deployed, can introduce new challenges. This paper reviews the Westinghouse AP-600 Human Factors Verification and Validation Plan selected for HSI evaluation model of Korea next generation nuclear control rooms. The AP-600 HSI evaluation model addressed 15 evaluation issues considering major activity class of operator and task complexity factors. This paper also describes the test procedures experimenters should follow to evaluate the addressed issues.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.2489-2491
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• 2005

Currently, Programmable Logic Contorller(PLC) uses Real Time Operation System(RTOS) as basic OS. RTOS executes defined results as to defined time. General features of RTOS emphasize the priority in each task, high-speed process of external interrupt, task scheduling, synchronization in task, the limitation of memory capacity. For safety critical placement, PLC software needs Verification and Validation(V&V). For example, nuclear power plant. In this paper, PLC RTOS is verified by formal methods. Particularly, formal method V&V uses verification tool called 'STATEMATE', and shows the results.

• 한국항공우주학회지
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• 제45권6호
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• pp.508-516
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• 2017

항공우주 시스템 개발에 있어 M&S (Modeling and Simulation)의 광범위한 사용이 보편화되고 있고 인증(Certification) 혹은 인정 (Accreditation)을 통해 부적절한 M&S의 사용으로 인한 사고나 위험을 제도적으로 방지하려는 노력이 있어 왔다. 본 연구는 이와 관련된 M&S의 VV&A (Verification, Validation, and Accreditation) 활동을 다루었다. 항공우주 M&S는 항공우주시스템 개발에 활용을 목적으로 하고 대부분 물리법칙 기반의 모델링 기법을 사용한다. 또한, 시제제작 후 검증용 데이터가 비행시험을 통해 최종 확보된다는 점에서 여타의 M&S와는 다른 접근방법이 필요하다. 본 연구는 이러한 특성을 고려하여 M&S 개발과 VV&A의 시작점이라 할 수 있는 항공우주 시스템 개발에 적합한 M&S의 수명주기 모델과 개발 패러다임을 다양한 문헌 연구를 토대로 제안하였다.

• 한국컴퓨터정보학회논문지
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• 제27권5호
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• pp.101-107
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• 2022

모델링 및 시뮬레이션은 목표 시스템의 동작 검증, 성능 분석, 운용 최적화, 예측을 위해 사용되는 기술이다. 이 기술의 대표적인 이산사건 시스템 명세(DEVS)는 모델들을 엄격한 형식론으로 정의하고 모델 간의 구조를 계층화한다. 이 DEVS 모델들의 원자 모델은 목표와 다른 의도로 동작하게 될 경우 시뮬레이션은 잘못된 의사결정으로 이어질 수 있다. 그럼에도 대부분 DEVS 시스템은 모델 테스트의 부재 또는 수동 테스트 환경으로 제공하여 개발자가 모델을 검증하는 데 오랜 시간이 소비된다. 본 논문에서는 파이썬 기반 DEVS에서 정확하고 빠른 원자 모델의 검증을 위해 스크립트 기반 테스트 시스템을 제안한다. 제안 테스트 시스템은 기존 방식인 수동 테스트와 새로운 방식인 스크립트 기반 테스트를 둘 다 사용한다. 우리 시스템의 실험 결과, 제안 테스트 방식은 스크립트를 10번 연속 실행 시 24ms 이내에 실행되었다. 그리하여 제안 시스템은 스크립트 기반 테스트를 사용해서 빠른 원자 모델 검증 시간을 보장하고, 테스트 스크립트의 재사용성을 향상한다.

• 한국군사과학기술학회지
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• 제9권1호
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• pp.60-71
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• 2006

With the increased reliance on M & S(Modeling & Simulation) in military training, defense analysis, and system acquisition. The credibility of M & S becomes even more critical issue in the M & S application community. In this paper, we have introduced the VV & A(Verification, Validation and Accreditation) concept of M & S for the assurance of its credibility, and proposed the VV & A model applicable to a military simulator development with the illustrative example of MSAM(Medium range-Surface to Air Missile) system simulator.

• 시스템엔지니어링학술지
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• 제5권2호
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• pp.11-16
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• 2009

This study introduces the verification, validation & accreditation (VV&A) process for modeling & simulation (M&S). VV&A is standard process for credibility of M&S. In several countries including USA, for weapon system of Defense Development using M&S, VV&A is necessary procedures to acquire official approving for credibility of M&S. Many countries have regular recommend practice guide (RPG) and instructive for VV&A of M&S. In this study, we focus the VV&A key concepts as Department of Defense RPG of USA and give the outline of the main VV&A concepts because we don't have any available VV&A Instructive. Also, this report documents the first significant VV&A application for a MITS(M-SAM Integrate Test System) including Verification and Validation(V&V) activity and tasks.

• International Journal of Internet, Broadcasting and Communication
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• 제16권1호
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• pp.169-175
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• 2024

In this paper, we introduce a novel approach to enhance document security by integrating Computer Generated Hologram(CGH) encryption technology with a system for document encryption, printing, and subsequent verification using a smartphone application. The proposed system enables the encryption of documents using CGH technology and their printing on the edges of the document, simplifying document verification and validation through a smartphone application. Furthermore, the system leverages high-resolution smartphone cameras to perform online verification of the original document and supports offline document decryption, ensuring tamper detection even in environments without internet connectivity. This research contributes to the development of a comprehensive and versatile solution for document security and integrity, with applications in various domains.

• Nuclear Engineering and Technology
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• 제31권2호
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• pp.157-171
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• 1999

In this work, an automatic software verification method for Nuclear Power Plant (NPP) protection system is developed. This method utilizes Colored Petri Net (CPN) for system modeling and Prototype Verification System (PVS) for mathematical verification. In order to help flow-through from modeling by CPN to mathematical proof by PVS, an information extractor from CPN models has been developed in this work. In order to convert the extracted information to the PVS specification language, a translator also has been developed. ML that is a higher-order functional language programs the information extractor and translator. This combined method has been applied to a protection system function of Wolsong NPP SDS2(Steam Generator Low Level Trip). As a result of this application, we could prove completeness and consistency of the requirement logically. Through this work, in short, an axiom or lemma based-analysis method for CPN models is newly suggested in order to complement CPN analysis methods and a guideline for the use of formal methods is proposed in order to apply them to NPP Software Verification and Validation.