저장 탱크에서 위험물 누출량 계산을 위한 모델링 연구

Abstract

For a few decades, due to the development of various industries such as the semiconductor, fine chemicals, etc., the usage of hazardous materials has been rapidly increased. Thus, chemical accidents such as dispersion, fire and explosions generated during the maintenance, repair and operation of processes can trigger massive losses both inside and outside of the workplaces. Recently, in HF(hydro fluorine) leak accidents of Gumi occurred in September 27, 2012, all workers inside the workplace were killed and many firefighters, police officers, nearby residents (about 11,000 people), crops and livestock also suffered from various losses. HF is used as a cleaner in semiconductor processing and this is colorless and odorless gas at room temperature and normal pressure. And this is very toxic gas to human body. Even a small amount of HF can cause serious damage to the community. Due to the frequency and risks of these hazardous chemical accidents, more specialized and comprehensive response strategies for hazardous chemicals have recently been required. Moreover, since the two laws for the registration and management of chemical substance have been enacted in Korea, it has been gaining more importance to manage hazardous substances. However, because of various limitations in terms of time, cost, and expertise, most companies have established qualitative safety strategies rather than quantitative ones. Therefore, in order to establish and verify accurate the impact of them, it is essential to analyze various possible accident scenarios based on the scientific simulations and determine what equipments would be effective to mitigate the accidents. In this study, the system, where a reserve tank is installed next to the dangerous substances tank, is analyzed with a mathematical modeling. If the leakage accident occurs, a pump transfers a chemical substance to the reserve tank. Throughout this system, a hazardous substance can be transferred to the reserve tank and the total leakage of a hazardous substance can be reduced. Since there is no research on these systems, it is impossible to evaluate the impact of various mitigation systems. The main goal of this study is to evaluate and verify the effect of a mitigation system and this can be widely applied in the consequence analysis of chemical accidents.