CORROSION BEHAVIOUR OF CONTAINER MATERIALS FOR THE DISPOSAL OF HIGH LEVEL WASTES IN ROCK SALT FORMATIONS
In 1983 - 1984 extensive laboratory-scale experiments (immersion tests) to evaluate the long-term corrosion behaviour of selected materials in salt brines and first in-situ experiments were performed. In the laboratory experiments the materials Ti 99.8-Pd, Hastelloy C4 and hot-rolled low carbon steel (reference materials in the joint European corrosion programme) as well as cast steel, spheroidal cast iron, Si cast iron and the Ni Resists type D2 and D4 were investigated. The investigated parameters were: temperature (90 degrees C, 170 degrees C, 100 degrees C), gamma radiation (10**5 rad/h) and different compositions of salt brines. The results obtained show that, in addition to Ti 99.8-Pd, also Hastelloy C4 and unalloyed steels are in principle suitable for being used for long-term stable HLW containers if the gamma dose rate is reduced by suitable shielding. Furthermore, the susceptibility of Hastelloy C4 to crevice corrosion must be taken into account. Further studies will be necessary to provide final evidence of the suitability of the materials examined. These will mainly involve clarification of questions related to hydrogen embrittlement (Ti 99.8-Pd, unalloyed steels) and to the influence of pressure and saline impurities (e.g. J, Br) on corrosion.
Bibliographic Reference: EUR 10400 EN (1986) FS, 63 P., BFR 250, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124124800 / Last updated on: 1987-01-01
Available languages: en