 Although referred to as a test, the actual stresses the flask underwent were well below what they are designed to withstand, as much of the energy from the collision was absorbed by the train and also in moving the flask some distance.This flask is on display at the training center at Heysham 1 Power Station.Introduced in the early 1960s, Magnox flasks consists of four layers; an internal skip containing the waste; guides and protectors surrounding the skip; all contained within the steel main body of flask itself, with characteristic cooling fins; and (since the early 1990s) a transport cabin of panels which provide an external housing.