THERMAL ANALYSIS OF THE TRANSHIELD 20 CONTAINER

This paper describes the thermal analysis of the Transhield 20 container which has been performed in support of its safety approval.   The Transhield 20 is a type B(U)F container developed by AEA Technology for the transport of bulk quantities of alpha-active intermediate level waste. Externally the package is an 6.1m x 2.4m x 2.6m ISO container while internally it contains a 1.9m diameter stainless steel pressure vessel The space between the external frame and the pressure vessel is mostly filled with cork. The Transhield 20 is designed to transport up to thirty five 2001 drums, held in five carousels. It can be adapted, however, to transport 5001 drums or other large items. Because it is intended for the transport of materials with low heat generation, the container is designed to carry a maximum total heat load of only 280W. A fuller description of the Transhield 20 container is given by Gaffka and Lawrence [ 1998].