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Title: Numerical analysis of thermal-hydrological conditions in thesingle heater test at Yucca Mountain

Abstract

The Single Heater Test (SHT) is one of two in-situ thermal tests included in the site characterization program for the potential underground nuclear waste repository at Yucca Mountain. The heating phase of the SHT started in August 1996, and was completed in May 1997 after 9 months of heating. The coupled processes in the unsaturated fractured rock mass around the heater were monitored by numerous sensors for thermal, hydrological, mechanical and chemical data. In addition to passive monitoring, active testing of the rock mass moisture content was performed using geophysical methods and air injection testing. The extensive data set available from this test gives a unique opportunity to improve the understanding of the thermal-hydrological situation in the natural setting of the repository rocks. The present paper focuses on the 3-D numerical simulation of the thermal-hydrological processes in the SHT using TOUGH2. In the comparative analysis, they are particularly interested in the accuracy of different fracture-matrix-interaction concepts such as the Effective Continuum (ECM), the Dual Continuum (DKM), and the Multiple Interacting Continua (MINC) method.

Authors:
;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
926728
Report Number(s):
LBNL-41684
R&D Project: 0; BnR: YN0100000; TRN: US0803129
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58; ACCURACY; AIR; HEATERS; HEATING; MOISTURE; MONITORING; NUMERICAL ANALYSIS; RADIOACTIVE WASTES; SIMULATION; SITE CHARACTERIZATION; TESTING; YUCCA MOUNTAIN

Citation Formats

Birkholzer, Jens T., and Tsang, Yvonne W.. Numerical analysis of thermal-hydrological conditions in thesingle heater test at Yucca Mountain. United States: N. p., 1998. Web. doi:10.2172/926728.
Birkholzer, Jens T., & Tsang, Yvonne W.. Numerical analysis of thermal-hydrological conditions in thesingle heater test at Yucca Mountain. United States. doi:10.2172/926728.
Birkholzer, Jens T., and Tsang, Yvonne W.. Sat . "Numerical analysis of thermal-hydrological conditions in thesingle heater test at Yucca Mountain". United States. doi:10.2172/926728. https://www.osti.gov/servlets/purl/926728.
@article{osti_926728,
title = {Numerical analysis of thermal-hydrological conditions in thesingle heater test at Yucca Mountain},
author = {Birkholzer, Jens T. and Tsang, Yvonne W.},
abstractNote = {The Single Heater Test (SHT) is one of two in-situ thermal tests included in the site characterization program for the potential underground nuclear waste repository at Yucca Mountain. The heating phase of the SHT started in August 1996, and was completed in May 1997 after 9 months of heating. The coupled processes in the unsaturated fractured rock mass around the heater were monitored by numerous sensors for thermal, hydrological, mechanical and chemical data. In addition to passive monitoring, active testing of the rock mass moisture content was performed using geophysical methods and air injection testing. The extensive data set available from this test gives a unique opportunity to improve the understanding of the thermal-hydrological situation in the natural setting of the repository rocks. The present paper focuses on the 3-D numerical simulation of the thermal-hydrological processes in the SHT using TOUGH2. In the comparative analysis, they are particularly interested in the accuracy of different fracture-matrix-interaction concepts such as the Effective Continuum (ECM), the Dual Continuum (DKM), and the Multiple Interacting Continua (MINC) method.},
doi = {10.2172/926728},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Aug 08 00:00:00 EDT 1998},
month = {Sat Aug 08 00:00:00 EDT 1998}
}

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