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Title: Natural geochemical analogues of the near field of high-level nuclear waste repositories

Abstract

United States practice has been to design high-level nuclear waste (HLW) geological repositories with waste densities sufficiently high that repository temperatures surrounding the waste will exceed 100{degrees}C and could reach 250{degrees}C. Basalt and devitrified vitroclastic tuff are among the host rocks considered for waste emplacement. Near-field repository thermal behavior and chemical alteration in such rocks is expected to be similar to that observed in many geothermal systems. Therefore, the predictive modeling required for performance assessment studies of the near field could be validated and calibrated using geothermal systems as natural analogues. Examples are given which demonstrate the need for refinement of the thermodynamic databases used in geochemical modeling of near-field natural analogues and the extent to which present models can predict conditions in geothermal fields.

Authors:
 [1]
  1. Lawrence Berkeley Lab., CA (United States)
Publication Date:
Research Org.:
US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Div. of Regulatory Applications; Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses
OSTI Identifier:
146990
Report Number(s):
NUREG/CP-0147; CONF-9107285-; CNWRA-93-020
ON: TI96001409; TRN: 96:001448
Resource Type:
Conference
Resource Relation:
Conference: Workshop on the role of natural analogs in geologic disposal of high-level nuclear waste, San Antonio, TX (United States), 22-25 Jul 1991; Other Information: PBD: Sep 1995; Related Information: Is Part Of Workshop on the role of natural analogs in geologic disposal of high-level nuclear waste: Proceedings; Kovach, L.A. [ed.] [Nuclear Regulatory Commission, Washington, DC (United States). Div. of Regulatory Applications]; Murphy, W.M. [ed.] [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses]; PB: 120 p.
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 54 ENVIRONMENTAL SCIENCES; HIGH-LEVEL RADIOACTIVE WASTES; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL; NATURAL ANALOGUE; USA; RADIOACTIVE WASTE MANAGEMENT; GEOCHEMISTRY

Citation Formats

Apps, J A. Natural geochemical analogues of the near field of high-level nuclear waste repositories. United States: N. p., 1995. Web.
Apps, J A. Natural geochemical analogues of the near field of high-level nuclear waste repositories. United States.
Apps, J A. 1995. "Natural geochemical analogues of the near field of high-level nuclear waste repositories". United States. https://www.osti.gov/servlets/purl/146990.
@article{osti_146990,
title = {Natural geochemical analogues of the near field of high-level nuclear waste repositories},
author = {Apps, J A},
abstractNote = {United States practice has been to design high-level nuclear waste (HLW) geological repositories with waste densities sufficiently high that repository temperatures surrounding the waste will exceed 100{degrees}C and could reach 250{degrees}C. Basalt and devitrified vitroclastic tuff are among the host rocks considered for waste emplacement. Near-field repository thermal behavior and chemical alteration in such rocks is expected to be similar to that observed in many geothermal systems. Therefore, the predictive modeling required for performance assessment studies of the near field could be validated and calibrated using geothermal systems as natural analogues. Examples are given which demonstrate the need for refinement of the thermodynamic databases used in geochemical modeling of near-field natural analogues and the extent to which present models can predict conditions in geothermal fields.},
doi = {},
url = {https://www.osti.gov/biblio/146990}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1995},
month = {Fri Sep 01 00:00:00 EDT 1995}
}

Conference:
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