Description

The canisters reach their maximum temperature in the repository after about 10 years. TIf the radial gap between the cast iron insert and the copper is closed at this temperature due to creep or plastic deformation (see FEP C04), cooling down to ambient temperature will cause a tensile strain in the copper shell due to the fact that the copper will shrink more than the cast iron when the temperature is decreasing.

SKB Number

SKB FEP Number

C05

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. Neglected since the thermal expansion will cause negligible strains in the materials. Failed canister. Neglected.

References

Bibliographic references to obtain more information

SR-Site Fuel and canister process report, TR-10-46, Section(s) 1.10, 3.4.4