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http://dx.doi.org/10.7733/jkrws.2012.10.4.295

Radionuclides Transport from the Hypothetical Disposal Facility in the KURT Field Condition on the Time Domain  

Hwang, Youngtaek (Chung-nam National University)
Ko, Nak-Youl (Korea Atomic Energy Research Institute)
Choi, Jong Won (Korea Atomic Energy Research Institute)
Jo, Seong-Seock (Chung-nam National University)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.10, no.4, 2012 , pp. 295-303 More about this Journal
Abstract
Based on the data observed and analyzed on a groundwater flow system in the KURT (KAERI Underground Research Tunnel) site, the transport of radionuclides, which were assumed to be released at the supposed position, was calculated on the time-domain. A groundwater pathway from the release position to the surface was identified by simulating the groundwater flow model with the hydrogeological characteristics measured from the field tests in the KURT site. The elapsed time when the radionuclides moved through the pathway is evaluated using TDRW (Time Domain Random Walk) method for simulating the transport on the time-domain. Some retention mechanisms, such as radioactive decay, equilibrium sorption, and matrix diffusion, as well as the advection-dispersion were selected as the factors to influence on the elapsed time. From the simulation results, the effects of the sorption and matrix diffusion, determined by the properties of the radionuclides and underground media, on the transport of the radionuclides were analyzed and a decay chain of the radionuclides was also examined. The radionuclide ratio of the mass discharge into the surface environment to the mass released from the supposed repository did not exceed $10^{-3}$, and it decreased when the matrix diffusion were considered. The method used in this study could be used in preparing the data on radionuclide transport for a safety assessment of a geological disposal facility because the method could evaluate the travel time of the radionuclides considering the transport retention mechanism.
Keywords
Particle tracking simulation; Groundwater pathway; Radionuclide transport; Time domain random walk;
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Times Cited By KSCI : 3  (Citation Analysis)
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