Effective diffusivity of carbon dioxide and iodine through G tunnel tuff

Conference · Mon Dec 31 00:00:00 EST 1990

OSTI ID:138157

Bardakci, T; King, F G; Sein, M K ^[1]

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1. North Carolina A and T State Univ., Greensboro, NC (USA)

The Topopah Spring Member of the Paintbrush Tuff in Yucca Mountain Nevada is a prime candidate for the site of the first national high level radioactive waste repository. Spent fuel from power reactors is currently considered to be the most significant commercial high level nuclear waste form. The effective diffusivity of carbon dioxide and iodine through G tunnel tuff were determined using a steady-state method and an unsteady-state method respectively. Results show that the effective diffusivity of carbon dioxide and iodine through dry tuff increased with temperature. The effective diffusivity of carbon dioxide decreased as the moisture content of the G tunnel tuff increased. An empirical correlation was obtained to estimate the effective diffusivity of carbon dioxide as a function temperature and the percent saturation. Specific surface area and pore volume of tuff was determined using a mercury porosimeter. A scanning electron microscope was utilized to further characterize the porous structure of the tuff samples.

• Research Organization: Materials Research Society, Pittsburgh, PA (United States)
• OSTI ID: 138157
• Report Number(s): CONF-891129-; TRN: JT9071%%478
• Resource Relation: Conference: 13. symposium scientific basis for nuclear waste management, Boston, MA (United States), 27 Nov - 2 Dec 1989; Other Information: PBD: 1990; Related Information: Is Part Of Scientific basis for nuclear waste management 13; Oversby, V.M. [ed.] [Lawrence Livermore National Lab., CA (USA)]; Brown, P.W. [ed.] [Pennsylvania State Univ., University Park, PA (USA)]; PB: 784 p.
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
DIFFUSION
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
RADIONUCLIDE MIGRATION
IODINE
TUFF
YUCCA MOUNTAIN
SITE CHARACTERIZATION
BOREHOLES
CARBON 14
DISSOLVED GASES
FLOW MODELS
INGESTION
IODINE 129
MOISTURE
POROSIMETERS
RADIATION HAZARDS
RADIATION PROTECTION
RESEARCH PROGRAMS
SCANNING ELECTRON MICROSCOPY
SPENT FUELS
STEADY-STATE CONDITIONS
SURFACE AREA
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
Yucca Mountain Project