The TK-C30 Compound Unit for the Transport of Spent Fuel Assemblies From WWER-440 Type Nuclear Reactors

Brennstoffinstitut Freiberg (Freiberg Fuel Research Institute) has developed a shipping cask with a capacity of 54 spent fuel assemblies from WWER-440 type pressurized water reactors. This cask, known as CJO (see Fig. 1), consists of a )20 mm thick solid cylindrical shell made of a higher-strength weldable structural steel (H52-JN). It is closed with a lid of the same thickness by means of bolts. The cask has a ·diameter of approx. 2m and a height of approx. 4 m. Its total weight is 85,000 kg, contents included. The cask is fabricated out of three forgings, which are welded together over the entire wall length, and provided with fins all around in order to dissipate heat and diminish impact forces. A special rail car is used for transporting the cask (see Fig. 2). For this shipping cask, compliance with the Type B package requirements laid down in the IAEA recommendations /1/ had to be proved.