Safe transportation
Package options in Canada
There are several transportation package designs certified for use in Canada. They include the Used Fuel Transportation Package (UFTP) and the Dry Storage Container Transportation Package (DSC-TP). We are assessing the transportation of used nuclear fuel using both of these package designs.
Certifying package designs
When all requirements are met, the CNSC issues a certificate. It specifies procedures for manufacturing, operating and maintaining the package. It also defines the authorized contents the package can carry.
Transportation
Used nuclear fuel transportation packages
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Used Fuel Transportation Package (UFTP)
The UFTP has three main components: the body, lid and impact limiter. The body and lid are made of solid stainless steel with walls nearly 30 centimetres thick. The lid is attached to the body by 32 bolts.
Two Viton o-ring seals are installed between the body and the lid. The first inner seal provides containment for the package contents. The second outer seal provides redundant containment in case gas somehow bypasses the inner seal.
The impact limiter has a redwood core encased in a stainless steel skin. The stainless steel body and lid provide containment, shielding and impact resistance. The impact limiter is designed to protect the body and lid closure in the event of an accident. A UFTP can carry 192 used fuel bundles. It weighs almost 35 tonnes when loaded. Two trunions are used to lift the package and provide attachment points for tie-downs during transport.
Dry Storage Container Transportation Package (DSC-TP)
A DSC-TP consists of a dry storage container (DSC) with impact limiters on each end. The DSC includes a body and lid made of high-density concrete encased in carbon steel. The reusable impact limiters are stainless steel shells filled with rigid foam and are connected by steel cables. The DSC provides containment and shielding, while the impact limiters protect it in the event of an accident. A DSC can carry 384 used fuel bundles. It weighs approximately 100 tonnes when loaded.
