A 250,000 Kg of propane in a tank of 300 m³ at 20^oC, 8.2 bar abs, experienced a BLEVE. Assuming an atmospheric humidity corresponding to a water partial pressure of 2810N/m² and a heat of combustion of 46,350KJ/Kg, determine the following: 

(i) Size 

(ii )Duration 

(iii) Thermal flux at 250m from the BLEVE.