Description
The copper canister is primarily a corrosion barrier. The mechanical strength of the copper canister is of subordinate importance, but the canister must withstand the loads associated with handling, transport and deposition. The copper must also possess sufficient ductility to allow straining, either plastically or by creep when the canister is deformed by the external load against the insert. Furthermore, the copper canister must sustain loads caused by deformations of the cast iron insert in response to external loads.
SKB Number
SKB FEP Number
C04
Main Category
Main category for FEP
Internal process
System Component
System component to which the FEP applies
Cast iron insert and copper canister
Handling
Explanation of how the FEP is treated
Intact canister. Isostatic and shear loads modelled in design analysis of canister, see section 5.4.3 in SR-Site Main report, SKB TR-11-01. (Uneven loads from uneven swelling of the buffer and lack of straightness of the deposition hole as well as creep in copper included).
Considered as cause for failure when isostatic or shear loads on canister exceed design premises loads.
Failed canister. Neglected.
References
Bibliographic references to obtain more information
SR-Site Fuel and canister process report, TR-10-46, Section(s) 1.10, 3.4.3; SR-Site Main report, TR-11-01, Section(s) 5.4.3