Transport container with coolable thermal shield

A transport container (1) for helium (He) comprising:

• an inner container (6) for receiving the helium (He), a coolant container (14) for receiving a cryogenic fluid (N2), an outer container (2) in which the inner container (6) and the coolant container (14) are received, and a thermal shield (21) in which the inner container (6) is received and which can be actively cooled using the cryogenic fluid (N2),
• said thermal shield (21) having at least one cooling line (26), which is fluidically connected to the coolant container (14) and in which the cryogenic fluid (N2) can be received in order to actively cool the thermal shield (21), and at least one return line (34, 35), by means of which the at least one cooling line (26) is fluidically connected to the coolant container (14) in order to return the cryogenic fluid (N2) back to the coolant container (14),
• wherein an inside diameter (d34, d35) of the at least one return line (34, 35) is larger than an outside diameter (d26) of the at least one cooling line (26).