Proposal and Evaluation of a Method for Promoting Organizational Learning to Foster Safety Culture in Nuclear Power Plants

摘要

Safety is top priority in nuclear power plants. Safety culture, which is organizational culture which makes members of the organization to pay their attention to safety as their priority, is essential to keep safety. It is known that continuous learning activity using accident and incident database is necessary to develop safety culture. Nevertheless, the learning activity has not been continued, because of the lack of motivation to use database. In this study, therefore, the authors aim at developing a new method to promote learning activity to use database. First, a time-variation model of motivation for using database was constructed based on an interview with a worker in a nuclear power plant who uses his own database spontaneously. This model assumes that an attachment, which is an emotional bond to a particular object, was the most significant factor to enhance the motivation for using the database. Second, "Praising each other's data" and "adding original data", were proposed as a method to foster attachment to database. Then, a subject experiment for evaluating the proposed method was conducted. The result showed that the proposed method needs to be modified to include additional factors such as "Quality of praise", and "Degree of interest".