수소 저장탱크 폭발 파편의 비산거리 및 양거리 산정법에 대한 비교 분석

Hydrogen storage tank explosions pose serious risks due to high-pressure fragment dispersion. However, most existing research has focused on blast pressure and thermal effects. This study investigates the applicability of the quantity-distance (QD) concept, commonly used in the field of explosives and munitions, to hydrogen storage tank explosions, and conducts a comparative analysis with a theoretical method (i.e., the horizontal range method) for estimating fragment throw distances. This study considered the 2019 Gangneung hydrogen tank explosion and a hydrogen tank explosion experiment conducted in China as case studies. The analysis shows that although the horizontal range method offers high precision by reflecting the physical characteristics of fragments, it requires complex calculations and sensitive input variables. By contrast, the QD method provides a simple and consistent framework suitable for regulatory application; however, it lacks the ability to predict exact fragment trajectories. These two methods are therefore complementary and suitable in different contexts: the horizontal range method is appropriate for detailed risk assessments in specific scenarios, while the QD method is effective for estimating conservative safety distances under worst-case conditions. By applying both methods in a complementary manner or selecting the appropriate method based on the analysis purpose, a more comprehensive and reliable assessment of fragment impact zones can be achieved.