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The International INTRAVAL project. Phase 1 case 2. Radionuclide migration in single natural fractures in granite

Technical Report:

Abstract

The INTRAVAL study addresses validation of geosphere transport models for use in repository performance assessment by examining various test cases relevant to radioactive waste disposal. This report describes the results from INTRAVAL test case 2 which is based on a set of laboratory experiments studying migration of non-sorbing as well as sorbing tracers in a single fracture in granitic cores. Three project teams have investigated this test case. Models including advection, dispersion, sorption to the fracture surface, matrix diffusion and sorption within the rock matrix were calibrated against the experimental breakthrough curves. Obtained best-fit values of the parameters determining the interaction between tracer and rock were in fair agreement with independently measured data. Models neglecting matrix diffusion and sorption within the rock matrix gave poor fits to the experimental data. These results suggest the need to include matrix diffusion and matrix sorption in the model to represent data for this test case. Furthermore, it was not possible to distinguish between hydrodynamic dispersion and channelling dispersion since equally good fits were obtained with both models. Equally good fits were also obtained with models assuming constant fracture aperture and variable fracture aperture. In the context of performance assessment of repositories in fractured  More>>
Authors:
Skagius, K [1] 
  1. ed.
Publication Date:
Dec 31, 1992
Product Type:
Technical Report
Report Number:
INIS-XN-417
Reference Number:
SCA: 052002; 540230; PA: AIX-24:002759; EDB-93:006183; ERA-18:005153; SN: 93000913402
Resource Relation:
Other Information: PBD: 1992
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; GRANITES; RADIONUCLIDE MIGRATION; COMPUTER CODES; FLOW MODELS; RADIOACTIVE WASTE DISPOSAL; COORDINATED RESEARCH PROGRAMS; ADVECTION; BENCH-SCALE EXPERIMENTS; DISPERSIONS; EXPERIMENTAL DATA; GEOLOGIC FRACTURES; ROCK-FLUID INTERACTIONS; SENSITIVITY ANALYSIS; SORPTION; TRACER TECHNIQUES; 052002; 540230; WASTE DISPOSAL AND STORAGE; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
OSTI ID:
10108924
Research Organizations:
Nuclear Energy Agency, 75 - Paris (France)
Country of Origin:
NEA
Language:
English
Other Identifying Numbers:
Other: ON: DE93609568; TRN: XN9200021002759
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
[38] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Skagius, K. The International INTRAVAL project. Phase 1 case 2. Radionuclide migration in single natural fractures in granite. NEA: N. p., 1992. Web.
Skagius, K. The International INTRAVAL project. Phase 1 case 2. Radionuclide migration in single natural fractures in granite. NEA.
Skagius, K. 1992. "The International INTRAVAL project. Phase 1 case 2. Radionuclide migration in single natural fractures in granite." NEA.
@misc{etde_10108924,
title = {The International INTRAVAL project. Phase 1 case 2. Radionuclide migration in single natural fractures in granite}
author = {Skagius, K}
abstractNote = {The INTRAVAL study addresses validation of geosphere transport models for use in repository performance assessment by examining various test cases relevant to radioactive waste disposal. This report describes the results from INTRAVAL test case 2 which is based on a set of laboratory experiments studying migration of non-sorbing as well as sorbing tracers in a single fracture in granitic cores. Three project teams have investigated this test case. Models including advection, dispersion, sorption to the fracture surface, matrix diffusion and sorption within the rock matrix were calibrated against the experimental breakthrough curves. Obtained best-fit values of the parameters determining the interaction between tracer and rock were in fair agreement with independently measured data. Models neglecting matrix diffusion and sorption within the rock matrix gave poor fits to the experimental data. These results suggest the need to include matrix diffusion and matrix sorption in the model to represent data for this test case. Furthermore, it was not possible to distinguish between hydrodynamic dispersion and channelling dispersion since equally good fits were obtained with both models. Equally good fits were also obtained with models assuming constant fracture aperture and variable fracture aperture. In the context of performance assessment of repositories in fractured rock, the major outcome from this test case is additional support for the inclusion of matrix diffusion and matrix sorption in the transport models. 17 refs., 14 figs., 3 tabs.}
place = {NEA}
year = {1992}
month = {Dec}
}