Modeling fluid-rock interaction at Yucca Mountain, Nevada; A progress report, April 15, 1992

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Volcanic rocks at Yucca Mountain, Nevada aie being assessed for their suitability as a potential repository for high-level nuclear waste. Recent progress in modeling fluid-rock interactions, in particular the mineralogical and chemical changes that may accompany waste disposal at Yucca Mountain, will be reviewed in this publication. In Part 1 of this publication, ``Geochemical Modeling of Clinoptilolite-Water Interactions,`` solid-solution and cation-exchange models for the zeolite clinoptilolite are developed and compared to experimental and field observations. At Yucca Mountain, clinoptilolite which is found lining fractures and as a major component of zeolitized tuffs, is expected to play an important role in ... continued below

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72 p.

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Viani, B.E. & Bruton, C.J. August 1, 1992.

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Description

Volcanic rocks at Yucca Mountain, Nevada aie being assessed for their suitability as a potential repository for high-level nuclear waste. Recent progress in modeling fluid-rock interactions, in particular the mineralogical and chemical changes that may accompany waste disposal at Yucca Mountain, will be reviewed in this publication. In Part 1 of this publication, ``Geochemical Modeling of Clinoptilolite-Water Interactions,`` solid-solution and cation-exchange models for the zeolite clinoptilolite are developed and compared to experimental and field observations. At Yucca Mountain, clinoptilolite which is found lining fractures and as a major component of zeolitized tuffs, is expected to play an important role in sequestering radionuclides that may escape from a potential nuclear waste repository. The solid-solution and ion-exchange models were evaluated by comparing predicted stabilities and exchangeable cation distributions of clinoptilolites with: (1) published binary exchange data; (2) compositions of coexisting clinoptilolites and formation waters at Yucca Mountain; (3) experimental sorption isotherms of Cs and Sr on zeolitized tuff, and (4) high temperature experimental data. Good agreement was found between predictions and expertmental data, especially for binary exchange and Cs and Sr sorption on clinoptilolite. Part 2 of this publication, ``Geochemical Simulation of Fluid-Rock Interactions at Yucca Mountain,`` describes preliminary numerical simulations of fluid-rock interactions at Yucca Mountain. The solid-solution model developed in the first part of the paper is used to evaluate the stability and composition of clinciptilolite and other minerals in the host rock under ambient conditions and after waste emplacement.

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72 p.

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INIS; OSTI as DE92041080

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  • Other Information: PBD: Aug 1992

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  • Other: DE92041080
  • Report No.: UCRL-ID--109921
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/138469 | External Link
  • Office of Scientific & Technical Information Report Number: 138469
  • Archival Resource Key: ark:/67531/metadc619519

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  • August 1, 1992

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2016, 2:32 p.m.

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Viani, B.E. & Bruton, C.J. Modeling fluid-rock interaction at Yucca Mountain, Nevada; A progress report, April 15, 1992, report, August 1, 1992; California. (digital.library.unt.edu/ark:/67531/metadc619519/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.