Perception Study of Safety Indicators in Nuclear Installations using Mann Withney Nonparametric Statistic Technique

Abstract A safety perception assessment of nuclear plants have been conducted. Factors to be considered in the assessment are demographic factors that illustrate the different job positions considered to affect the perception of safety indicators in the existing implementation. The study was conducted using nonparametric statistical techniques, especially Mann Whitney test techniques that emphasize the presence or absence of differences between two examples of independent or dependent populations. As a result, the perception pattern of safety indicator shows that there is no difference between the operational worker of the research reactor and the nuclear installation work unit. However, through internal grouping of a research reactor only based on position, education, and age groups, there is a difference in perception of safety indicators. In grouping based on the position structure of perception difference lies in all the characteristics whereas in the group based on education and age obtained there are two differences from the five characteristics considered. With a 4.05 scale likert scale, generally perceptions of safety considerations in accordance with their significance in both nuclear research reactor and nuclear installation work units can be considered good enough. When compared to other test techniques for each safety indicator it is found that almost all of the techniques employed result in acceptance of the null hypothesis which states that perceptions of the importance of safety do not differ between work units