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Assuming an LNG storage tank leakage accident risk level as target element A, high-risk location, high-risk equipment, high-risk processes, high-risk personnel, and high-risk substances are respectively classified as B1, B2, B3, B4, and B5, and the secondary element is set to Cij (i = 1, 2, …, 5; j = 1, 2, … n).
Combined with the Analytic Network Process (ANP) and normal cloud model for quantitative analysis, a safety risk analysis and assessment model for LNG storage tanks based on the ANP-normal cloud model was developed. Safety analysis was conducted with the example of an LNG storage tank area of a factory.
The safety risk of the LNG storage tank leakage accident was calculated with Equation (11) in the paper. The calculation yields that R = [S1 S2 S3 S4 S5] × [Ex1 Ex2 Ex3 Ex4 Ex5] T = 0.7586 ∈ [0.5, 0.8). The same method was used for all the first-level indicators, and the evaluation results of the two methods are shown in Table 10. Table 10.
The LNG storage area uses two 30,000 m 3 bimetallic single-volume tanks with an operating pressure of 10 kPa g and a storage cycle is 7.5 days. The tanks are equipped with a safety control system and a fire protection system, with overpressure protection and negative pressure protection.
In this trend, the equipment, as the largest part of the LNG storage area, the possibility of accidents and the severity of consequences of the equipment are greatly increased. In recent years, LNG storage tank leaks and explosions have been more often caused by equipment failures.
Safety analysis was conducted with the example of an LNG storage tank area of a factory. The results show that the risk level for LNG tank leakage is level IV, with high-risk …
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The study focuses on the potential impact of tank area leakage on other systems within the station, in which liquid hydrogen storage absolute pressure for this simulation is set …
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