Simulation of gas phase transport of carbon-14 at Yucca Mountain, Nevada, USA

Waste Management
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Abstract

We have simulated gas phase transport of Carbon-14 at Yucca Mountain, Nevada. Three models were established to calculate travel time of Carbon-14 from the potential repository to the mountain surface: a geochemical model for retardation factors, a coupled gas-flow and heat transfer model for temperature and gas flow fields, and a particle tracker for travel time calculation. The simulations used three parallel, east-west cross-sections that were taken from the Sandia National Laboratories Interactive Graphics Information System (IGIS). Assuming that the repository is filled with 30- year-old waste at an initial areal power density of 57 kw/acre, we found that repository temperatures remain above 60??C for more than 10,000 years. For a tuff permeability of 10-7 cm2, Carbon-14 travel times to the surface are mostly less than 1,000 years, for particles starting at any time within the first 10,000 years. If the tuff permeability is 10-8 cm2, however, Carbon- 14 travel times to the surface range from 3,000 to 12,000 years, for particle starting within the 10,000 years.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Simulation of gas phase transport of carbon-14 at Yucca Mountain, Nevada, USA
Series title Waste Management
DOI 10.1016/0956-053X(94)90045-0
Volume 14
Issue 5
Year Published 1994
Language English
Publisher Pergamon Press Inc
Publisher location Tarrytown, NY, United States
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Waste Management
First page 409
Last page 420