Corrosion of carbon steel overpacks for the geological disposal of radioactive waste
This is the final report of a three-year research programme investigating the long-term corrosion of carbon steel overpacks for the disposal of nuclear waste in granitic and argillaceous environments. The aim of the work has been to develop mechanistic mathematical models of uniform and localised corrosion, and to test their validity by comparing them with experimental data. It has been found that both models overestimate the rate of attack by factors of 4-6. It is recommended that additional work should be undertaken to improve the uniform corrosion model by including the retarding influence of accumulated corrosion products. However, in the case of localised corrosion, attention should focus on improving the estimate of the maximum period for localised attack, based on the criterion that such corrosion is only feasible under aerobic conditions. If, as seems likely, this period is only 20-40 years, the extent of penetration may then be estimated with sufficient accuracy from experimental data. However, the localised corrosion model in its present form will still have an important role in investigating the importance of different environmental conditions, with regard to the rate of corrosion penetration.
Bibliographic Reference: EUR 13671 EN (1991) 61 pp., FS, ECU 6.25
ISBN: ISBN 92-826-2910-4
Record Number: 199111157 / Last updated on: 1994-12-02
Original language: en
Available languages: en