On the Leakage Safety Analysis of $9\%$ Nickel Type LNG Storage Tank with Thermal Resistance Effects

In this study, the FE analysis has been presented for the leakage safety of nickel type LNG storage tank based on the thermal resistance effects between insulation panels, comer protection and prestressed concrete(PC) structures. The FEM calculated results show that the leakage safety of fiber glass blanket, perlite powder and cellular glass insulators does not guarantee any more due to a strength failure of the insulation structure. But the corner protection and PC structure of outer tank may delay or sustain the leaked LNG of 10 days even though the inner tank and insulation structure are simultaneously failed. This means that nickel steel type LNG storage tank may be safe because of a high strength of the corner protection and outer tank structures.