Post-Closure Performance Assessment for Deep Borehole Disposal of Cs/Sr Capsules

Geoff A. Freeze, Emily Stein and Patrick V. Brady
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Geoff A. Freeze: Sandia National Laboratories, Albuquerque, NM 87185, USA
Emily Stein: Sandia National Laboratories, Albuquerque, NM 87185, USA
Patrick V. Brady: Sandia National Laboratories, Albuquerque, NM 87185, USA

Energies, 2019, vol. 12, issue 10, 1-15

Abstract: Post-closure performance assessment (PA) calculations suggest that deep borehole disposal of cesium (Cs)/strontium (Sr) capsules, a U.S. Department of Energy (DOE) waste form (WF), is safe, resulting in no releases to the biosphere over 10,000,000 years when the waste is placed in a 3–5 km deep waste disposal zone. The same is true when a hypothetical breach of a stuck waste package (WP) is assumed to occur at much shallower depths penetrated by through-going fractures. Cs and Sr retardation in the host rock is a key control over movement. Calculated borehole performance would be even stronger if credit was taken for the presence of the WP.

Keywords: boreholes; cesium (Cs); strontium (Sr) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (3)

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