• Nuclear Engineering and Technology
• /
• 제37권3호
• /
• pp.207-220
• /
• 2005

Nuclear power plants (NPP) are complex socio-technological systems that rely on the success of both hardware and human components. Empirical studies of plant operating experience show that human errors are important contributors to accidents and incidents, and that organizational factors play an important role in creating contexts for human errors. Current probabilistic safety assessments (PSA) do not explicitly model the systematic contribution of organizational factors to safety. As some countries, like the United States, are moving towards increased use of risk information in the regulation and operation of nuclear facilities, PSA quality has been identified as an area for improvement. The modeling of human errors, and underlying organizational weaknesses at the root of these errors, are important sources of uncertainty in existing PSAs and areas of on-going research. This paper presents a review of research into the following questions: Is there evidence that organizational factors are important to NPP safety? How do organizations contribute to safety in NPP operations? And how can these organizational contributions be captured more explicitly in PSA? We present a few past incidents that illustrate the potential safety implications of organizational deficiencies, some mechanisms by which organizational factors contribute to NPP risk, and some of the methods proposed in the literature for performing root-cause analyses and including organizational factors in PSA.

• Nuclear Engineering and Technology
• /
• 제36권1호
• /
• pp.64-72
• /
• 2004

The purpose of this study is to develop a system dynamics model for the assessment of the organizational and human factors in a nuclear power plant which contribute to nuclear safety. Previous studies can be classified into two major approaches. One is the engineering approach using tools such as ergonomics and Probability Safety Assessment (PSA). The other is the socio-psychology approach. Both have contributed to find organizational and human factors and to present guidelines to lessen human error in plants. However, since these approaches assume that the relationship among factors is independent they do not explain the interactions among the factors or variables in Nuclear Power Plants. To overcome these restrictions, a system dynamics model, which can show cause and effect relationships among factors and quantify the organizational and human factors, has been developed. Handling variables such as the degree of leadership, the number of employees, and workload in each department, users can simulate various situations in nuclear power plant organization. Through simulation, users can get insights to improve safety in plants and to find managerial tools in both organizational and human factors.

• Nuclear Engineering and Technology
• /
• 제51권1호
• /
• pp.104-115
• /
• 2019

Since the Fukushima Daiichi accident, there has been an emphasis on the risk resulting from multi-unit accidents. Human reliability analysis (HRA) is one of the important issues in multi-unit probabilistic safety assessment (MUPSA). Hence, there is a need to properly identify all the human and organizational factors relevant to a multi-unit incident scenario in a nuclear power plant (NPP). This study identifies and categorizes the human and organizational factors relevant to a multi-unit incident scenario of NPPs based on a review of relevant literature. These factors are then analyzed to ascertain all possible unit-to-unit interactions that need to be considered in the multi-unit HRA and the pattern of interactions. The human and organizational factors are classified into five categories: organization, work device, task, performance shaping factors, and environmental factors. The identification and classification of these factors will significantly contribute to the development of adequate strategies and guidelines for managing multi-unit accidents. This study is a necessary initial step in developing an effective HRA method for multiple NPP units in a site.

• 한국항공운항학회지
• /
• 제25권4호
• /
• pp.161-169
• /
• 2017

The Human Factors Analysis and Classification System (HFACS) is a general human error framework originally developed and tested within the U.S. military as a tool for investigating and analyzing the human causes of aviation accidents. Based upon Reason's (1990) model of latent and active failures, HFACS addresses human error at all levels of the system, including the condition of aircrew and organizational factors. As a result, this study aims to examine the influence between the latent conditions based on HFACS. This study seeks to verify the factors of "Organizational Influence" effecting the "Precondition for Unsafe Acts" of HFACS. The results of empirical analysis demonstrated that the organizational influence had a positive influence on precondition for unsafe act, especially the "Organizational Climate" of organizational influence had even greater influence on precondition for unsafe acts.

• 한국콘텐츠학회논문지
• /
• 제16권7호
• /
• pp.1-18
• /
• 2016

선행연구에 따르면 조직문화 및 조직내 커뮤니케이션이 지식경영과 조직성과에 영향을 미칠 수 있지만, 이런 모든 변인들 간의 관계를 보여주는 보다 통합적인 연구가 여전히 필요하다. 이 논문은 이러한 변인들의 상호간 관계 및 영향력을 제시함으로써, 지식경영 및 관련된 변인들을 통해 조직성과를 향상시키는 통합적인 접근방법을 개발하기 위한 다양한 방법들을 제시한다. 따라서 이 연구의 목적은 국가문화, 조직문화, 조직내 커뮤니케이션, 지식경영, 조직성과 간의 상호관계를 고찰하는 것이다. 이러한 변인들 간의 관계에 대한 종합적 문헌연구방법을 통해 상호관계가 개념적 모델로서 요약되었다. 이 모델에 의하면 조직내 커뮤니케이션, 지식경영, 조직문화는 조직성과에 영향을 미치며, 또한 조직내 커뮤니케이션과 조직문화는 지식경영에도 영향을 미친다. 이러한 개념적 모델에 기반하여, 조직성과를 최대한 향상시킬 방법을 찾고자 하는 인적자원 연구자 및 실무자들을 위한 시사점들이 제시되었다.

• 한국시스템다이내믹스연구
• /
• 제3권2호
• /
• pp.49-68
• /
• 2002

The intent of this study is to develop system dynamics model for assessment of organizational and human factors in nuclear power plant which can contribute to secure the nuclear safety. Previous studies are classified into two major approaches. One is engineering approach such as ergonomics and probability safety assessment(PSA). The other is social science approach such like sociology, organization theory and psychology. Both have contributed to find organization and human factors and to present guideline to lessen human error in NPP. But, since these methodologies assume that relationship among factors is independent they don't explain the interactions among factors or variables in NPP. To overcome these limits, we have developed system dynamics model which can show cause and effect among factors and quantify organizational and human factors. The model we developed is composed of 16 functions of job process in nuclear power, and shows interactions among various factors which affects employees' productivity and job quality. Handling variables such like degree of leadership, adjustment of number of employee, and workload in each department, users can simulate various situations in nuclear power plant in the organization side. Through simulation, user can get insight to improve safety in plants and to find managerial tools in the organization and human side. Analyzing pattern of variables, users can get knowledge of their organization structure, and understand stands of other departments or employees. Ultimately they can build learning organization to secure optimal safety in nuclear power plant.

• 한국안전학회지
• /
• 제30권1호
• /
• pp.87-93
• /
• 2015

Most incidents and accidents involved human during operating NPPs have a tendency to be structured by complicated and various organizational, individual, and environmental factors. The salient feature of the human error in NPP was extremely low frequency, extremely high complicated and extremely serious damage of human life and property. Our research team defined as 'rare human errors'. To prevent the rare human errors, the most researchers and analysts insist invariably that the root causes be made clear. The making them clear, however, is difficult because their root causes are very various and uncertain. However, These tools have limits that they do not adapt all operating situations and circumstances such as design base events. The purpose of this study is to improve the rare human error hazards consider the situational contex. Through this challenging try based on evidences to the human errors could be useful to prevent rare and critical events can occur in the future.

• 서비스연구
• /
• 제11권3호
• /
• pp.98-116
• /
• 2021

4차 산업혁명시대의 도래로 인해 현대사회는 과거와 다르게 경제, 경영, 문화 등 다양한 요소들이 변화하고 있다. 그 중 경영적 측면에서 나타나는 주된 특징은 유형재화 중심에서 무형재화 중심으로 변화하는 것이며 이에 기업들은 새로운 경영방식 도입, 제조에서 서비스로의 전환, 기술의 확장 등 혁신을 추구하기 위해 노력 하고 있다. 하지만 변화하는 시대 지속적 가치창출을 위해 가장 중요성이 높아지고 있는 인적자원에 관해서는 아직까지 단순한 방식의 전환에 머무르고 있어 실질적인 혁신을 가능케 하는 노력이 부족한 실정이다. 이에 본 연구에서는 서비스경제시대 새로운 인재상에 대한 기업에서의 활용성을 검증하고자 인재요소에 대한 중요성을 인식하고 기존 도출 된 서비스경제시대에 변화된 인재상 요소들이 조직문화와 조직구조의 유형에 따라 어떠한 관계와 차이가 있는지를 연구하였다. 최근 연구에서 도출, 검증 된 서비스경제시대 인재상요소를 활용하여 구성원들의 생각과 행동에 영향을 주는 요소인 조직문화와 조직구조의 유형으로 나누어 관계를 검증하였으며 그 결과 조직문화와 조직유형별로 유의미한 인재상에 다소 차이가 있었으나 두 가지 요소를 결합하여 해석하였을 경우에는 새로운 인재상이 모두 유의미한 것으로 나타났으며 이는 서비스경제시대 인재상이 실제 기업에 적합하다는 것으로 해석될 수 있다. 다만 본 연구의 지표가 한정적 이었다는 한계를 극복하기 위해 향후 다양한 요인들이 고려 된 표본과 체계화 된 조직유형 및 업종별 산업별 분류를 통한 연구가 지속적으로 이어져야 할 필요가 있다.

• 대한인간공학회지
• /
• 제25권3호
• /
• pp.77-83
• /
• 2006

The purpose of this study is to assess the organizational types and the job stress factors that affect the procedure-based job performances in nuclear power plants(NPPs). We derived 24 organizational factors affecting to the job stress in NPPs from the job stress analysis models of NIOSH(1989), Cooper(1990), and Karasek(1990). onsidering the safety characteristic in operating tasks of NPPs, we individuate among the tasks in NPPs through the division of duty and the analysis of cost activity. Through the questionnaire survey, a structured interview with the responsible employees, and expert panels, we assess 70 tasks among 777 tasks managed officially under the procedures. They are the representative tasks to the duties of each division and are directly related to the safety. We utilize the OPTI(organizational personality type indicators) to characterize the personality type of each organization in NPPs.

• 한국시스템다이내믹스연구
• /
• 제2권2호
• /
• pp.63-84
• /
• 2001

There are many activities to improve Nuclear Power Plant(NPP) performance and safety such as equipment improvement, redundancy and the like. Since public perception about NPP safety affects nuclear policy of site selection. Recent researches for NPP safety are including not only technical approaches but also social ones. In. this contexture, the purpose of this study is to develope cuassal loop digaram for assessment of organizational and human factors in NPP safety. Through real data from interview with NPP employees we develope causal loop diagram which can explain the relations of cause and effect among variables, and depict social system for organizational and human factors in NPP safety.