RD&D-Programme 2004 - SKB

was lower by at least a factor of 100. The experiments were conducted in a glove box in an
atmosphere with 1–2 ppm oxygen. Typical corrosion rates were less than 0.1 micron per year
at 30°C and less than 1 micron per year at 50°C.
Programme
The field is judged today not to require any further research, development or demonstration.
New developments are being monitored and will be acted on when appropriate.
16.2.10 Stress corrosion cracking of cast iron insert
Conclusions in RD&D 2001 and its review
Not dealt with in RD&D 2001. SKB deems the risks of stress corrosion cracking to be small,
since only local areas in the insert have tensile stresses.
Newfound knowledge since RD&D 2001
No new knowledge has been forthcoming.
Programme
The field is judged today not to require any further research, development or demonstration.
New developments are being monitored and will be acted on when appropriate.
16.2.11 Radiation effects
A study of the risks of radiation embrittlement was carried out prior to RD&D 2001. The study
shows that the risks are negligible and that the effect during 100,000 years would not even be
measurable /16-11/.
Conclusions in RD&D 2001 and its review
Not dealt with in RD&D 2001.
Newfound knowledge since RD&D 2001
No new knowledge has been forthcoming.
Programme
The field is judged today not to require any further research, development or demonstration.
New developments are being monitored and will be acted on when appropriate.
16.2.12 Corrosion of copper canister
Under currently known conditions at the deep repository level, the canister is expected to
remain intact for a very long time.
Conclusions in RD&D 2001 and its review
In SKI’s view, there are questions that need to be further investigated, primarily the properties
of copper oxide films, and in particular the influence of chloride and sulphide ions, and the
influence of concrete on copper (saline alkaline water).
RD&D-Programme 2004 189