Abstract
If the storaged substances in a pressure vessel like H2, LNG and so on explode, the disaster range is expanded because the explosion power is increased and the fragments of the shells are scattered far and wide. As a result, there are some cases where the actual disaster range may be larger than the calculated one by the conventional method.
No report on the disaster of chemical plants has apparently been published. Hence, a computer simulation program which is able to calculate the disaster range of explosion in pressure vessels has been developed, and the accident of gas-explosion which occurred in 1986 has been analyzed by this program. It is shown that the calculated disaster range almost coincides with the actual one and it is recognized that this program is very useful for safety evaluation for chemical plants with many pressure vessels.
