36Cl studies of water movements deep within unsaturated tuffs
- 1. Los Alamos National Lab., NM (USA)
- 2. Hydro Geo Chem., Inc., Tucson, AZ (USA)
- 3. Rochester Univ., NY (USA). Nuclear Structure Research Lab.
Description
Measurements of 36Cl in cuttings from a borehole that was drilled 387 m into unsaturated tuffs indicate the possible detection of significant radioactive decay of cosmogenic 36Cl in two of the samples. However, the 36Cl/Cl ratio was found to vary with the amount of pulverization of the cuttings. Work is in progress to separate the 36Cl/Cl data into cosmogenic and in situ components. The cosmogenic component will be used to trace very slow water movements through the unsaturated zone. Bomb pulse 36Cl was observed as deep as 153 m, and this identification is not constrained by the problem with pulverization. This work shows the efficacy of 36Cl measurements for detecting modern water movements deep in the unsaturated zone. 9 refs., 3 tabs
Availability note (English)
MF available from INIS under the Report Number; NTIS, PC A02/MF A01 as DE90010621; OSTI; INIS; US Govt. Printing Office Dep.
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Additional details
Additional titles
- Augmented title (English)
- Yucca mountain project
Publishing Information
- Imprint Pagination
- 8 p.
- Report number
- LA-UR--90-1461
Conference
- Title
- 5. international conference on accelerator mass spectroscopy.
- Dates
- 23-27 Apr 1990.
- Place
- Paris (France).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21059642
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; S58: GEOSCIENCES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BOREHOLES; CHLORINE 36; DECAY; ENVIRONMENTAL EXPOSURE PATHWAY; FLUID FLOW; GROUND WATER; HIGH-LEVEL RADIOACTIVE WASTES; LEACHING; MASS SPECTROMETERS; PERMEABILITY; RADIOECOLOGICAL CONCENTRATION; RADIONUCLIDE MIGRATION; TUFF; UNDERGROUND DISPOSAL; YUCCA MOUNTAIN
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CAVITIES; CHLORINE ISOTOPES; DISSOLUTION; ECOLOGICAL CONCENTRATION; ELECTRON CAPTURE RADIOISOTOPES; ENVIRONMENTAL TRANSPORT; HYDROGEN COMPOUNDS; IGNEOUS ROCKS; ISOTOPES; LIGHT NUCLEI; MANAGEMENT; MASS TRANSFER; MATERIALS; MEASURING INSTRUMENTS; MOUNTAINS; NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; POLAR SOLVENTS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; RADIOISOTOPES; ROCKS; SEPARATION PROCESSES; SOLVENTS; SPECTROMETERS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES; WATER; YEARS LIVING RADIOISOTOPES
Optional Information
- Contract/Grant/Project number
- Contract W-7405-ENG-36
- Secondary number(s)
- CONF-900491--1.