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시스템엔지니어링 기법을 적용한 가압중수로 노심관리 지원시스템 개발 사례
염충섭,김진일,송용만,Yeom, Choong Sub,Kim, Jin Il,Song, Young Man 한국시스템엔지니어링학회 2013 시스템엔지니어링학술지 Vol.9 No.1
Systems Engineering Approach was applied to the development of operator-support core management system based on the on-site operation experience and document of core management procedures, which is for enhancing operability and safety in PHWR (Pressurized Heavy Water Reactor) operation. The dissertation and definition of the system were given on th basis of investigating and analyzing the core management procedures. Fuel management, detector calibration, safety management, core power distribution monitoring, and integrated data management were defined as main user's requirements. From the requirements, 11 upper functional requirements were extracted by considering the on-site operation experience and investigating documents of core management procedures. Detailed requirements of the system which were produced by analyzing the upper functional requirements were identified by interviewing members who have responsibility of the core management procedures, which were written in SRS (Software Requirement Specification) document by using IEEE 830 template. The system was designed on the basis of the SRS and analysis in terms of nuclear engineering, and then tested by simulation using on-site data as a example. A model of core power monitoring related to the core management was suggested and a standard process for the core management was also suggested. And extraction, analysis, and documentation of the requirements were suggested as a case in terms of systems engineering.
염충섭 ( Choong Sub Yeom ),임동렬 ( Dong Ryul Rhim ),이정익 ( Jeong Ik Lee ) 한국공업화학회 2014 공업화학전망 Vol.17 No.1
에너지원의 활용성 측면과 전력수급의 효율성을 향상시키기 위한 현실적 대안 중 초임계 CO2 발전 기술은 다양한 열원에 적용 가능한 범용적인 사이클로 발전 기술의 패러다임을 바꿀 수 있는 잠재력을 가지고 있다. 본 고에서는 초임계 CO2의 특성과 이를 이용하여 발전 사이클의 효율 및 소형화가 가능한 원리를 소개하고 최근에 초임계 CO2 발전 기술이 각광받기 시작한 근거를 검토하였다. 그리고 다양한 발전 분야에 대한 주요 국가의 초임계 CO2 발전 기술의 최신 개발 동향을 중심으로 기술하였다.
중소형 플랜트의 표준화된 플랜트 엔지니어링 활동 모델 개발: 상세설계를 중심으로
신중욱,염충섭,Shin, Jung Uk,Yeom, Choong Sub 한국시스템엔지니어링학회 2018 시스템엔지니어링학술지 Vol.14 No.1
Plant Engineering is a series of activities going through following life cycle phases: planning, basic design, detailed design, procurement and construction, commissioning, operation and maintenance, to produce a target product. From among these phases of plant engineering life cycle, a detailed design phase is an important phase producing final design deliveries. Luckily, through technical co-operation and experiences of constructing plants, large Korean engineering companies have accumulated know-hows of efficient detailed designs. However, smaller engineering companies have less experience of performing detailed designs so there is always a risk of causing design errors in the detailed design phase. To mitigate the risk of design errors in the detailed design phase, it is necessary to systematize a concrete activity model of a detailed design phase. In this paper, we have developed a prototype of a detailed design activity model through a widely used function modeling methodology called IDEF0.
A Study on the Possibility of Grid-Connected Application of Liquid Air Energy Storage System
Ga Yeon Ha(하가연),Choong Sub Yeom(염충섭) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Various technical approaches for energy storage system (ESS) have drawn attention for securing stability in the power system, which is due to the increase of power consumption and renewable energy generation. Among them, liquid air energy storage (LAES) is a system that liquefies air using dump or renewable power, stores it, and supplies power by using it when necessary. It has the merits of large-capacity, long-cycle, and no site restriction. In this study, to examine the grid connection of LAES in the point of view of the technical performance of the ESS, various ESS applications and technical requirements in terms of capacity, discharge time, reaction time, etc. were investigated. Based on the investigation, the characteristics and application requirements of each storage technology were compared to evaluate the grid-connected application of LAES. Finally, several methods of grid-connected applications for LAES could be identified.
모델 기반 중소형 플랜트 형상관리 시스템의 효과성 평가 사례
하가연,김진일,신중욱,염충섭,Ha, Ga Yeon,Kim, Jinil,Shin, Junguk,Yeom, Choong Sub 한국시스템엔지니어링학회 2021 시스템엔지니어링학술지 Vol.17 No.1
Plant Configuration Management(CM) is an activity to maintain consistency of design requirements, physical configuration, facility configuration information throughout the life cycle of the plant by systematically managing changes that occur during the plant design and operation process. Conformity between information must be ensured not only in the design stage, but also in the case of design changes in the operation and maintenance stages, and thus a computer system capable of efficiently managing them is required. In particular, in consideration of an application to small and medium-sized domestic plants, a computer system that can support configuration management at a low cost is needed. Accordingly, in this study, a configuration management system has been developed to support the management of plant design information and change procedures in the operation stage of small and medium-sized plants. Here, a case for quantitatively evaluating the effectiveness of the developed system is described.
원전 상태 감시 및 조기 경보용 빅데이터 시범 플랫폼의 설계를 위한 시스템 엔지니어링 방법론 적용 연구
차재민,손충연,황동식,신중욱,염충섭,Cha, Jae-Min,Shin, Junguk,Son, Choong-Yeon,Hwang, Dong-Sik,Yeom, Choong Sub 한국시스템엔지니어링학회 2015 시스템엔지니어링학술지 Vol.11 No.2
With the era of big data, the big data has been expected to have a large impact in the NPP safety areas. Although high interests of the big data for the NPP safety, only a limited researches concerning this issue are revealed. Especially, researches on the logical/physical structure and systematic design methods for the big data platform for the NPP safety were not dealt with. In this research, we design a new big data pilot platform for the NPP safety especially focusing on health monitoring and early warning services. For this, we propose a tailored design process based on SE approaches to manage inherent high complexities of the platform design. The proposed design process is consist of several steps from elicitate stakeholders to integration test via define operational concept and scenarios, and system requirements, design a conceptual functional architecture, select alternative physical modules for the derived functions and assess the applicability of the alternative modules, design a conceptual physical architecture, implement and integrate the physical modules. From the design process, this paper covers until the conceptual physical architecture design. In the following paper, the rest of the design process and results of the field test will be shown.
이미지 세그멘테이션 결과로부터 컨테이너 크레인의 장애물 충돌 경계를 추정하는 방법
유은섭(Eun-seop Yu),염충섭(Choong Sub Yeom),유보현(Bo Hyun Ryu) 대한기계학회 2022 大韓機械學會論文集A Vol.46 No.6
항만 컨테이너 크레인은 주행 시 작업자가 주변 환경을 인지하기 어렵기 때문에 2D 레이저 스캐너를 이용하여 주변 장애물을 감지하고 있다. 하지만, 위치가 고정된 컨테이너와 이동이 가능한 트럭을 구분할 수 없기 때문에 장애물이 감지된 경우 무조건 서행하여 작업 효율이 떨어진다. 이러한 문제를 해결하기 위해 본 논문에서는 컨테이너 크레인에 설치된 CCTV의 이미지를 기반으로 주변 장애물을 인식하고 충돌 경계를 추정할 수 있는 방법을 제안한다. 수집된 이미지는 세그멘테이션을 통해 장애물을 인식하고 경계선을 추출한다. 추출된 경계선은 PnP(perspective-n-point)를 통해 이미지 좌표계를 현실 좌표계로 변환하고 추출된 경계선을 기반으로 충돌 발생 근접 거리를 산출한다. 제안된 알고리즘은 컨테이너 크레인과 유사한 실험실 환경에서 3개의 장애물에 대해서 수행하였으며 최종 결과는 LiDAR 측정결과와 비교하여 유효성을 검증하였다. Because a container crane operator struggles to recognize the surrounding environment while driving, the container crane uses a 2D laser scanner to detect surrounding obstacles. However, because a container with a fixed location cannot be distinguished from a truck that can move, when an obstacle is detected, it unconditionally moves slowly, reducing the work efficiency. To solve this problem, this study proposes a method to recognize obstacles and estimate collision boundaries based on the CCTV images installed on container cranes. The collected images recognize obstacles by segmentation and extract boundaries. The extracted boundary line converts the image coordinate system to the real coordinate system using perspective-n-point (PnP) and calculates the collision proximity distance based on the extracted boundary line. The proposed algorithm was performed on three obstacles in a laboratory environment similar to that of a container crane, and the final result was validated by comparing it with the LiDAR measurement result.
플랜트 사업의 리스크 관리를 위한 gate review 수행 방안
김진일(Jin-Il Kim),염충섭(Choong-Sub Yeom),신중욱(Joong-Uk Shin),하가연(Ga-Yeon Ha) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Gate review is to determine whether to proceed to the next stage by reviewing the project performance and the plan for the next stage at a certain point in system development to reduce the risk of the project. For the successful development of large complex systems such as plants, it is essential to reduce risks by conducting systematic gate reviews. Such gate reviews are defined in various ways according to the characteristics of the industry or organization. In this paper, we discussed a method to effectively define how to perform gate reviews in the plant industry.