Study plan for water movement test: Site Characterization Plan Study 8.3.1.2.2.2

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The water movement tracer test is designed to produce information derived from isotopic measurements of soil and tuff samples collected from Yucca Mountain that is pertinent for assessing the performance of a nuclear waste repository. Measurements of chlorine isotropic distributions will help characterize the percolation of precipitation into the unsaturated zone. The {sup 36}Cl in the unsaturated zone occurs from atmospheric fallout of {sup 36}Cl produced by cosmic-ray secondaries reacting with {sup 40}Ar and, to a lesser extent, with {sup 36}Ar. It also occurs as global fallout from high-yield nuclear weapons tests conducted at the Pacific Proving Grounds between 1952 ... continued below

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21 p.

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Norris, A. E. September 1989.

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Description

The water movement tracer test is designed to produce information derived from isotopic measurements of soil and tuff samples collected from Yucca Mountain that is pertinent for assessing the performance of a nuclear waste repository. Measurements of chlorine isotropic distributions will help characterize the percolation of precipitation into the unsaturated zone. The {sup 36}Cl in the unsaturated zone occurs from atmospheric fallout of {sup 36}Cl produced by cosmic-ray secondaries reacting with {sup 40}Ar and, to a lesser extent, with {sup 36}Ar. It also occurs as global fallout from high-yield nuclear weapons tests conducted at the Pacific Proving Grounds between 1952 and 1962. When chloride ions at the surface are washed underground by precipitation, the radioactive decay of the {sup 36}Cl in the chloride can be used to time the rate of water movement. The {sup 36}l half-life of 301,000 yr permits the detection of water movement in the range of approximately 50,000 to 2 million years. These data are part of the input for developing numerical models of ground water flow at this site. 5 refs., 4 figs., 4 tabs.

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21 p.

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NTIS, PC A03/MF A01 - OSTI; OSTI as DE89016019

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  • Other Information: PBD: Sep 1989

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  • Other: DE89016019
  • Report No.: LA--11605-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/137509 | External Link
  • Office of Scientific & Technical Information Report Number: 137509
  • Archival Resource Key: ark:/67531/metadc625646

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  • September 1989

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  • June 16, 2015, 7:43 a.m.

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  • March 10, 2016, 1:47 p.m.

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Norris, A. E. Study plan for water movement test: Site Characterization Plan Study 8.3.1.2.2.2, report, September 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc625646/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.