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Effect of sodium chloride concentration on diffusivity in rock matrix

Technical Report:

Abstract

The effect of salt concentration of test water on the diffusion properties of rock was studied in the study. The diffusion coefficients were determined by tracer method using nonsorbing {sup 36}Cl-isotope as a tracer and 1 M NaCl solution as water. The results were compared with the results of a previous study where diffusivities were determined by tracer techniques using 0.0044 M NaCl solution as water and by electrical resistivity method, where the samples were saturated with 1 M NaCl solution. Two different rock types, gneiss around a slickenside fracture and granite around a partially filled carbonate fracture, were used in the studies. The apparent diffusivities measured in this study did not deviate essentially from each other. The effective diffusivities, on the contrary, depended clearly on the salt concentration of water used to saturate the rock samples. The porosities determined by water saturation method were considerably higher than the porosities evaluated from the diffusion coefficients.
Authors:
Uusheimo, K; Muurinen, A [1] 
  1. Helsinki Univ. of Technology, Otaniemi (Finland). Reactor Lab.
Publication Date:
Jul 01, 1990
Product Type:
Technical Report
Report Number:
YJT-90-11
Reference Number:
SCA: 540250; 052002; PA: AIX-23:007601; SN: 92000619546
Resource Relation:
Other Information: PBD: Jul 1990
Subject:
54 ENVIRONMENTAL SCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; GNEISSES; PERMEABILITY; POROSITY; GRANITES; SODIUM CHLORIDES; DIFFUSION; AQUEOUS SOLUTIONS; QUANTITY RATIO; TESTING; WATER; TRACER TECHNIQUES; CHLORINE 36; 540250; 052002; SITE RESOURCE AND USE STUDIES; WASTE DISPOSAL AND STORAGE
OSTI ID:
10104086
Research Organizations:
Voimayhtioeiden Ydinjaetetoimikunta, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE92612731; TRN: FI9100121007601
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FIN
Size:
26 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Uusheimo, K, and Muurinen, A. Effect of sodium chloride concentration on diffusivity in rock matrix. Finland: N. p., 1990. Web.
Uusheimo, K, & Muurinen, A. Effect of sodium chloride concentration on diffusivity in rock matrix. Finland.
Uusheimo, K, and Muurinen, A. 1990. "Effect of sodium chloride concentration on diffusivity in rock matrix." Finland.
@misc{etde_10104086,
title = {Effect of sodium chloride concentration on diffusivity in rock matrix}
author = {Uusheimo, K, and Muurinen, A}
abstractNote = {The effect of salt concentration of test water on the diffusion properties of rock was studied in the study. The diffusion coefficients were determined by tracer method using nonsorbing {sup 36}Cl-isotope as a tracer and 1 M NaCl solution as water. The results were compared with the results of a previous study where diffusivities were determined by tracer techniques using 0.0044 M NaCl solution as water and by electrical resistivity method, where the samples were saturated with 1 M NaCl solution. Two different rock types, gneiss around a slickenside fracture and granite around a partially filled carbonate fracture, were used in the studies. The apparent diffusivities measured in this study did not deviate essentially from each other. The effective diffusivities, on the contrary, depended clearly on the salt concentration of water used to saturate the rock samples. The porosities determined by water saturation method were considerably higher than the porosities evaluated from the diffusion coefficients.}
place = {Finland}
year = {1990}
month = {Jul}
}