Cliff Retreat Rates Associated with a Low-Level Radioactive Waste Disposal Facility in Los Alamos, New Mexico, USA

Author:

Goehring Brent1ORCID,Miller Elizabeth2ORCID,Birdsell Kay1,Schultz-Fellenz Emily S.2ORCID,Kelley Richard1,French Sean3,Stauffer Philip H.1ORCID

Affiliation:

1. Los Alamos National Laboratory, Earth and Environmental Sciences Division, Los Alamos, NM 87545, USA

2. Los Alamos National Laboratory, Analytics, Intelligence, and Technology Division, Los Alamos, NM 87545, USA

3. Los Alamos National Laboratory, Chemistry Division, Los Alamos, NM 87545, USA

Abstract

We present an analysis and interpretation of potential cliff stability at a low-level waste disposal facility at Los Alamos National Laboratory, New Mexico, using cliff morphologic and fracture characteristics coupled with carbon-14 surface exposure dating. Our study is important as it directly bears on the licensing criteria for low-level radioactive waste sites. We find that future characteristic cliff failures will likely not breach disposal pits and shafts over the 1000-year minimum regulatory period. Further, we find, using a multivariate regression model, that slope angle and cliff face aspect are sub-equal in importance to predict regions of high risk of failure when combined with surface exposure ages and assuming that old exposure ages are most indicative of stability (instability) and therefore can aid decision making in final design implementation.

Funder

U.S. DOE-Environmental Management

Publisher

MDPI AG

Reference28 articles.

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2. Department of Energy (2001). Radioactive Waste Management, U.S. Department of Energy Order DOE O 435.1; Department of Energy.

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4. Recent acceleration in coastal cliff retreat rates on the south coast of Great Britain;Hurst;Proc. Natl. Acad. Sci. USA,2016

5. The Effect of Rock Collapse on Coastal Cliff Retreat along the Chalk Cliffs of Northern France;Carlier;J. Coast. Res.,2018

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