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A Study on HSI Concept Design for Monitoring and Controlling Multi-Module Small Modular Reactors
Young Do Koo(구영도),Sa Kil Kim(김사길),Moon Won Song(송문원),Kwang Il Jeong(정광일),Joon Ku Lee(이준구) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.11
Objective: The objective of the study is to elicit a basic concept for a new human-system interface (HSI) for integrated monitoring and controlling multi-module reactors, which is capable of minimizing any negative effects on the safety of the reactors or human performance. Background: Recently the researches on developing a new nuclear reactor system (i.e., small modular reactors (SMRs)) as well as improving the safety of the existing large-scale nuclear power plants (NPPs) are being carried out. In light water SMRs being developed, there are some characteristics in common, which are distinguished from the existing light water reactors: The safety of SMRs is secured through both advanced designs (e.g., passive safety systems, high level of automation, and so on) and proven technologies utilized also in the existing NPPs. Economy of SMRs due to less than 300 MWe production capacity is planning to be usually covered through multi-module SMR operation by one operator using an individual workstation in a single main control room, as well as a high level of automation technology. More works are accompanied because of more than one mission such as electricity generation, which is the conventional mission, and desalination or hydrogen production, which are new ones. According to these characteristics of SMRs, a new human-system interface (HSI) design being able to monitor and control integrated multi-module SMRs, differ from the existing HSI, is needed in common in SMRs. Specifically, in HSI, several essential capabilities are required: operator’s tasks for monitoring and controlling multiple reactors and access to information on reactors should be supported, and explanations for high levels of automation and alarms also have to be provided. Accordingly, a new HSI concept design proper to multi-module SMRs in view of users’ and regulatory requirements and considerations is necessary. Furthermore, competitiveness of SMR being developed in Republic of Korea can be strengthened by drawing a new HSI design. Method: Current HSI designs for a single reactor designed in accordance with standard design process (i.e., NUREG-0700 Rev.3) is expected to be constrained to monitor and control multi-module SMRs. Thus, a new HSI concept should be presented through addressing challengeable considerations or trying a novel approach. Functional requirements needed in providing plant status, alarm, and controls for multiple SMRs are considered from users’ or a regulatory point-of-view to draw a new HSI design concept, beyond addressing a single reactor only. In addition, HSIs in other multi-module SMRs or surrogate facilities are investigated. Results: New HSI concepts for monitoring and controlling multiple SMRs are proposed, and some of the design examples are drawn, which is distinguished for the existing HSI. Conclusion: As this study is a part of developing a new HSI design for multi-module SMRs, additional study will be sequentially performed based on the result drawn in the study. Application: The result of this study will be used as the input to a study for the basic design of the HSI to be available to multi-module reactors in the future.
소프트 스위칭 전류원 인버터를 이용한 계통연계형 전력변환기
최영도(Young-Do Choy),이준기(Joon-Gee Lee),백승택(Seung-Taek Baek),한병문(Byung-Moon Han),소용철(Yong-Chul So) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
This paper proposes a soft-switching current-source inverter with a switched-capacitor module. The sysetm operation was analyzed by a theoretical approach with equivalent circuits and verified by a computer simulation with ISPICE software. The proposed system could be effectively applied for the power converter of photovoltaic power generation interconnected with the power system
최영도,김유택,이영호,Choi, Young-Do,Kim, You-Taek,Lee, Young-Ho 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.6
It has been known that one of the main obstacles of improving the performance of positive displacement hydraulic turbine is pressure pulsation which occurs at the regions upstream and downstream of the turbine. In order to suppress the pressure pulsation. occurrence reason of the pressure pulsation should be understood in detail Therefore. this study aims to establish a CFD analysis method by which the phenomena of unsteady pressure pulsation can be examined with high accuracy. Internal flow field of the turbine is modeled simply to generalize the relation between the pressure pulsation and internal flow. The results show that the Present CFD method adopting unsteady calculation can be applied successfully to the analysis of the Phenomena of Pressure Pulsation. Occurrence of the Pressure pulsation is due to the difference of the rotational speed of turbine rotors When driving rotor rotates by uniform speed and fellowing rotor rotates by variable speed, very large Pressure pulsation occurs within the turbine periodically.
유효낙차에 따른 80kW급 횡류수차의 성능 및 내부유동 해석
최영도,임재익,이영호,Choi, Young-Do,Lim, Jae-Ik,Lee, Young-Ho 한국마린엔지니어링학회 2010 한국마린엔지니어링학회지 Vol.34 No.5
Recently, small hydropower attracts attention because of its clean, renewable and abundant energy resources to develop. However, suitable turbine type is not determined yet in the range of small hydropower and it is necessary to study for the effective turbine type. Therefore, a 80kW-Class cross-flow turbine is adopted in this study because of its simple structure and high possibility of applying to small hydropower. The result shows that as effective head increases, tangential and radial flow velocities increase and thus, the increased tangential velocity contributes to the increase of angular momentum and output torque. 최근 신재생에너지 연구개발과 관련하여 소수력발전에 대한 관심이 높아지고 있지만, 기존의 대수력용 수차 시스템과는 달리 소수력에 적당한 수차의 설계법이 아직 확립되어 있지 않기 때문에 고성능의 소수력용 수차의 개발이 요구되고 있다. 그러나, 복잡한 터빈의 구조에 의한 상대적으로 높은 제작단가는 소수력발전용 터빈의 개발에 큰 걸림돌로 작용하고 있다. 따라서, 본 연구에서는 수차의 형상이 상대적으로 간단하고 소수력자원에 적용하기가 용이한 80kW급 횡류형 수차에 대하여 유효낙차 변화에 따른 성능 및 내부유동에 대해서 검토하였다. 유효낙차가 증가함에 따라서 원주방향 및 반경방향 속도비가 증가하게 되며, 증가한 원주속도에 의해 각운동량이 증가하여 출력도 커지게 된다.