Temporary cascade with life up to 500 years before recycling of the nuclear fuel.
Thank you very much. Do you have any references about it? What class of stainless steel?
Check the ref in http://rampac.energy.gov/docs/nrcinfo/NUREG_4363.pdf
and also http://www.posiva.fi/files/281/Posiva2005-02web.pdf
Both describe canisters made of ductile cast iron .
POSIVA 2005-02
Disposal Canister for Spent Nuclear Fuel –Design Report by Heikki Raiko
July 2005, POSIVA OY, FINLAND
Typical contents (in weight %) of the canister materials are as follows:
• Copper overpack; Cu 100 %
• Cast iron insert; Fe 92.8, C 3.2, Mg 0.05, Si 2.15, Mn 0.8, Ni 1.0 % (Werme & Ericsson 1995)
• Steel parts of the insert; Fe 98.3, C 0.2, Mn 1.5 % (SFS-EN 10025).
(reference E. Albertin)