• Nuclear Engineering and Technology
• /
• v.49 no.2
• /
• pp.335-341
• /
• 2017

The main control room (MCR) in advanced nuclear power plants (NPPs) has changed from analog to digital control system (DCS). Operation and control have become more automated, centralized, and accurate due to the digitalization of NPPs, which has improved the efficiency and security of the system. New issues associated with human reliability inevitably arise due to the adoption of new accident procedures and digitalization of main control rooms in NPPs. The LingAo II NPP is the first digital NPP in China to apply the state-oriented procedure. In order to address issues related to human reliability analysis for DCS and DCS + state-oriented procedure, the Hunan Institute of Technology conducted a research project based on a cooperative agreement with the LingDong Nuclear Power Co. Ltd. This paper is a brief introduction to the project.

• Fire Science and Engineering
• /
• v.31 no.2
• /
• pp.52-60
• /
• 2017

Numerical simulations were performed to evaluate the habitability of an operator for a cabinet fire in the main control room of a nuclear power plant presented in NUREG-1934. To this end, a Fire Dynamics Simulator (FDS), as a representative fire model, was used. As the criteria for determining the habitability of operator, toxic products, such as CO, were also considered, as well as radiative heat flux, upper layer temperature, smoke layer height, and optical density of smoke. As a result, the probabilities of exceeding the criteria for habitability were evaluated through the sensitivity analysis of the major input parameters and the uncertainty analysis of fire model for various fire scenarios, based on V&V (Verification and Validation). Sensitivity analyses of the maximum heat release rate, CO and soot yields, showed that the habitable time and the limit criterion, which determined the habitability, could be changed. The present methodology will be a realistic alternative to enhancing the reliability for a habitability evaluation in the main control room using uncertain information of cabinet fires.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.65 no.9
• /
• pp.1497-1503
• /
• 2016

This paper presents the overall measurement system for on-line test of super-speed maglev train. The super-speed maglev train is composed of vehicle, propulsion, power, and so on. In order to evaluate and diagnose for sub-system, we made overall measurement system. Just like the other measurement system, it is designed to distributed type. The hardware is consist of SCXI, PXI, Terminal, UPS, and so forth. It is installed on a train, control room, power room and track to collect lots of signals. The software controls hardware system, monitors main data such as inverter current, converter voltage. Using the measurement system, we evaluated a lot of performances for vehicle, track, and so forth. Through the developed system have improved reliability and safety for super-speed maglev train.

• Proceedings of the KIEE Conference
• /
• 1999.07b
• /
• pp.686-689
• /
• 1999

발전소 운전원 훈련용 시뮬레이터는 중앙제어실(MCR:Main Control Room) 운전원의 운전결과가 실시간 운영체계하에 발전소 프로세스 모델 및 컴퓨터 시스템과 통합되어 실제 발전소와 같은 반응을 운전원에게 제공하여야 한다. 따라서 시뮬레이터에는 프로세스의 동특성 이외에도 제어시스템의 모델링 및 운전원과 인터페이스되는 제어기들이 실제적으로 구성되어야하며, 이들 제어기와 컴퓨터시스템간 다양한 입력간의 통신 및 동기(Synchronization)가 중요하다. 본 논문에서는 원자력 발전소 시뮬레이터에서 쓰이는 지능형 계기(Intelligent Type Instrument)로 분류된 기기를 살펴보고 시뮬레이션을 위해 개발 구현된 방법들을 기술하고자한다.

• Proceedings of the Earthquake Engineering Society of Korea Conference
• /
• 2002.09a
• /
• pp.341-348
• /
• 2002

In these days, The base isolation system is often used to improve the seismic capacity of the structures instead of conventional techniques of strengthening the structural members. The purpose of this study is to evaluate dynamic property evaluation of control equipment using lead Lead Rubber Bearing. In this study, a base isolation test of seismic monitoring control cabinet with LRB(lead rubber bearing) was performed. The cabinet will be installed on access floor in MCR(main control room) of nuclear power plant. Details and dynamic characteristics of the access floor were considered in the construction of testing specimen. N-S component of El Centre earthquake was used as seismic input motion. Acceleration response spectrums in the top of cabinets showed that the first mode frequency of cabinet with LRB(lead rubber bearing) was shifted to 7.5 Hz in compared with 18Hz of cabinet without LRB and the maximum peak acceleration was reduced in a degree of22 percent from 2.35 g to 1.84 g

• KIEAE Journal
• /
• v.17 no.1
• /
• pp.55-61
• /
• 2017

Purpose : As the necessity of reinforcement of infections management in medical facilities after MERS increased, Ministry of Health and Welfare promulgated the enforcement regulations of medical law on February 3, 2017. Its main objective is to improve patients' safety and medical-care quality through the establishment of isolation facilities from infectious diseases and the set-up of standards for In-patient and ICU facilities. The purpose of this study is necessarily to propose a standardized spatial composition model for ward modules by analyzing changing environments of in-patient facilities according to the strengthened medical law. Method: Theoretical studies will be undergone of Evidence-based Designs to improve patients' safety, medical quality, and domestic/overseas in-patient room guidelines. With reference to the status of 24 general hospitals over 500 beds, the spatial compositions of the in-patient rooms and the types of multi/single bed room modules will be analyzed. The directions of future in-patient room module changes through the study of the minimum ward module types and various ward types will be presented. Result: This paper will hopefully provide guidelines for hospitalization rooms that can be applied to the revised rules of medical law enforcement and provide a basis for a comprehensive study of patients' safety and efficient infection control as well.

• Journal of the Korean Society of Food Culture
• /
• v.21 no.2
• /
• pp.154-160
• /
• 2006

This study examines the service satisfaction rate on high school students(637) in order to provide the basic data for marketing direction by analyzing the importance and satisfaction rate of the service quality. In IPA for the service quality, as the following properties are high in expectation as well as satisfaction they needed to maintain. They are the taste, scent, saltiness, proper temperature of the food, the quantity main food, nutritional value, the degree of freshness, and the smell of dining room. The following properties need the excessive efforts. They are the number of side dishes, eating place, the shape and material quality of dish, the costume of dining workers. As the following showed low importance degrees as well as satisfaction degrees, they don't need concentrated efforts. They are the harmony of color and shape, the interior design of the dining room, the arrangement of tables and chairs, the atmosphere of dining room, and the effect of nutrition instruction. As the education of nutrition is compulsory among the school group meal, the analysis based on the response of questioned students is supposed to be more careful. The items showing low satisfaction degrees while high importance degrees are considered to make an operational plans for the improvement through a variety of menu, the quality of food, the quantity for side-dishes, health control, the cleanness of dishes, the kindness of cooks, the performance of nutritionists, the charge of school meal, and meal time.

• Nuclear Engineering and Technology
• /
• v.52 no.1
• /
• pp.87-100
• /
• 2020

Performance shaping factors (PSFs) in a human reliability analysis (HRA) are one that may influence human performance in a task. Most currently applicable HRA methods for nuclear power plants (NPPs) use PSFs to highlight human error contributors and to adjust basic human error probabilities (HEPs) that assume nominal conditions of NPPs. Thus far, the effects of PSFs have been treated independently. However, many studies in the fields of psychology and human factors revealed that there may be relationships between PSFs. Therefore, the inter-relationships between PSFs need to be studied to better reflect their effects on operator errors. This study investigates these inter-relationships using two data sources and also suggests a context-based approach to treat the inter-relationships between PSFs. Correlation and factor analyses are performed to investigate the relationship between PSFs. The data sources are event reports of unexpected reactor trips in Korea and an experiment conducted in a simulator featuring a digital control room. Thereafter, context-based approaches based on the result of factor analysis are suggested and the feasibility of the grouped PSFs being treated as a new factor to estimate HEPs is examined using the experimental data.

• The Korean Nurse
• /
• v.32 no.4
• /
• pp.48-62
• /
• 1993

This study was done for the purpose of analyzing the job-satisfaction and its depressive factors in human relation of operating room nurses of university hospital. Therfore, it makes an offer the basic data to help the resolution and prevention of the problems in operating room nurses. Furthermore, this study was conducted in order to find out some kinds of scientific data for the better control of depressive factors of job-satisfaction expressed by the operating room nurses. The structred questionaire reports of 246 operating room nurses who were employed in 5 different university hospitals which have over 1, 000 beds located in Seoul, Korea were used, which wer collected from August 24th to August 30th of 1992. The author visited supervisors of operating room in each university hospital and explained the aim of this study. The most of them(90.0%) answered to the questionaires. Analysis of the collected data were done by mean, standard deviation, percentage, t-test, F-test, Q-test, correlation analysis, one-way ANOVA.and stepwise multiple regression analysis. Major findings of this study were as follows: 1. The job of the operating room nurses were remarkably related with the satisfaction in human relation, which was defined as the behavioral job with thoughtful action rather than with mechanical action. However, the degree of satisfaction in human relation with personnel in other departments was found to be the lowest and its the main depressive factors were appeared due to the absence of interaction and uncooperative attitudes. Therefore, it was required that the members of other job need more cooperative attitude to the actual works in the operating room nurses. 2. The depressive factors in the satisfaction degree of human relation with offical seniors wer significantly related with their irresponsibility and partialness. Moreover, the job attitude of the operating room nurses is abundantly required to be improved, 3. The depressive factors in the satisfaction of human relation with medical doctors were significantly related with their insincerity and the class-consciousness. It is clearly suggested that the medical doctors do more cooperative behaviors for the jobs of the operating room without the suggested that the medical doctors do more cooperative behaviors for the jobs of the operating room without the superiority feeling of class-consciousness. 4. There was a significantly positive association between the satisfaction degree of human relation of the nurses with the following charateristics. (1) The registered nurses which had a tendency to be satisfied about the registered nurses' job. (2) The registered nurses which had a tendency to be a technique-aptitued in the motivation of the registered nurses'job. (3) The registered nurses which had a tendency to be satisfied about the total hospital working carrier and the aspects of old ages. Finally, these findings indicated that the operating room nurses should require the professional education courses associated with a high-development techniques and setisfaction in their jobs.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.13 no.4
• /
• pp.107-112
• /
• 2007

The vibration generated on shipboard is very important because it greatly affects on the comfortable mind of passenger and working conditions of crews. Shipboard vibration is closely concerned with the development of propulsion method and the type of main engine to decide speed of ship. To make the propulsion power, the main engine of ship have continuous explosion process in engine room, so the shipboard vibration is generated. The shipboard vibration causes the physiological and psychological damages to human body. In the case of the human body exposed to the shipboard vibration, the evaluation of human exposure to whole-body vibration is prescribed in ISO 6954 : 2000(E). In this paper, to evaluate the shipboard working environment, two kinds of vibration levels onboard ship were measured and compared with one another between engine rooms, engine control rooms and wheel house by the regulation of ISO 6954 : 2000(E).