Which risk increases when a geological repository's waste canister integrity weakens during alpha decay?

💡 Explanation

Breaching results from alpha decay inducing helium production in the canister material, which can lead to embrittlement; because this weakening degrades the engineered barriers against radionuclide migration, diminished shielding of remaining radiation occurs, therefore weakening the canister is problematic rather than alternatives, without decay involved.

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