RD&D-Programme 2004 - SKB

15.2.5 Heat transport
Dealt with in section 15.1.4.
15.2.6 Water and gas transport in canister cavity,
boiling/condensation
The process is strongly coupled to several other processes. The processes are dealt with
collectively in section 16.2.
15.2.7 Thermal expansion/cladding failure
Conclusions in RD&D 2001 and its review
No research programme for this area was included in RD&D 2001, and no direct viewpoints
were offered in the review.
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.
15.2.8 Advection and diffusion
Solutes in the interior of the canister can be transported by advection and diffusion. These
processes are not discussed explicitly, but dealt with (often with pessimistic simplifications)
integrated with other processes. Transport of radionuclides in the near-field is dealt with in
section 18.3.
15.2.9 Residual gas radiolysis/acid formation
Conclusions in RD&D 2001 and its review
No research programme for this area was included in RD&D 2001, and no direct viewpoints
were offered in the review.
Newfound knowledge since RD&D 2001
The canisters may contain more water (600 grams) than has previously been assumed
(50 grams).
Programme
Radiolysis calculations will be carried out to determine whether the canister must be filled
with an inert gas in order to prevent radiolytic formation of nitric acid.
15.2.10 Water radiolysis
Conclusions in RD&D 2001 and its review
SKB decided to study iron corrosion in initially oxygen-free water under gamma irradiation.
No direct viewpoints were offered in the review.
170 RD&D-Programme 2004