Construction Record of Liquid Argon Tank(Prismatic Membrane Tank)

摘要

IHI was awarded a contract to perform EP+SV works from Fermi National Accelerator Laboratory (Fermilab)in USA for a prismatic liquid argon storage tank (-189~°C), which is to be used as prototype for the LBNE Project.Fermilab decided this contract due to IHI's membrane cryostat technologies from its EPC(Engineering,Procurement and Construction) experience in in-ground LNG storage tanks. The structure for the prismatic liquid argon storage tanks, however,differs to that of in-ground membrane LNG storage tanks due to the shape of the argon storage tank being prismatic and the difference in the secondary barrier system used to maintain ambient temperature of the outer concrete tank in case of leakage from the membrane inner tank.