Modelling Studies for the Assessment of the Advanced Cold Process Canister

by J. Henshaw, AEA Technology, Oxon, United Kingdom,
A. R. Hoch, AEA Technology, Oxon, United Kingdom,
S. M. Sharland, AEA Technology, Oxon, United Kingdom,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991


The Advanced Cold Process Canister (ACPC) is a new concept for the encapsulation of spent nuclear fuel for geological disposal. It consists of steel canister encased in a copper overpack. In this paper, modelling studies to assess the performance of the ACPC under repository conditions are presented. The production of nitric acid and ammonia through radiolysis of any water remaining inside the canister under fault conditions has been examined in this study. However, results suggest that only low levels are possible, and the risk of stress-corrosion cracking is considered small. The corrosion behaviour subsequent to a breach in the outer canister was also considered. A model was constructed to predict the hydrogen gas production due to corrosion reactions, and evolution of the corrosion behaviour.

Subject Headings: Corrosion | Fuels | Nuclear power | Steel | Radioactive wastes | Computer software | Computer models

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