Studies of the mobility of uranium and thorium in Nevada Test Site tuff
- Lawrence Berkeley Lab., CA (United States)
Hydro-geochemical processes must be understood if the movement of radionuclides away from a breached radioactive waste canister is to be modeled and predicted. In this respect, occurrences of uranium and thorium in hydrothermal systems are under investigation in tuff and in rhyolitic tuff that was heated to simulate the effects of introduction of radioactive waste. In these studies, high-resolution gamma spectrometry and fission-track radiography are coupled with observations of alteration mineralogy and thermal history to deduce the evidence of, or potential for movement of, U and Th in response to the thermal environment. Observations to date suggest that U was mobile in the vicinity of the heater but that localized reducing environments provided by Fe-Ti-Mn-oxide minerals concentrated U and thus attenuated its migration.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- OSTI ID:
- 138338
- Report Number(s):
- LBL-29700; ON: DE92000647; TRN: JT9212%%580
- Resource Relation:
- Other Information: PBD: Jun 1991; Related Information: Is Part Of Earth Sciences Division annual report 1990; PB: 197 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
THORIUM
RADIONUCLIDE MIGRATION
TUFF
URANIUM
ADSORPTION
DECAY
FISSION TRACKS
GAMMA SPECTROSCOPY
HEATING
HYDROLOGY
IRON OXIDES
MANGANESE OXIDES
MATHEMATICAL MODELS
MICRORADIOGRAPHY
MINERALS
NEVADA TEST SITE
PROGRESS REPORT
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE STORAGE
SIMULATION
SORPTIVE PROPERTIES
TITANIUM OXIDES
Yucca Mountain Project