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Title: Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials

Abstract

A backfill placed between a nuclear waste canister and the host geology of a nuclear waste repository can impede the migration of water through the waste package and retard the movement of radionuclides into the geologic formation. Hydraulic conductivities and swelling pressures are being determined as functions of the density of the compacted backfill, temperature, radiation dose, hydraulic head and the chemical composition of the permeating fluid. Bentonite clays and bentonite/sand mixtures have received initial emphasis. Sodium bentonite and calcium bentonite samples compacted to a dry density of 2.1 q/cm/sup 3/ had hydraulic conductivities in the range of 10/sup -12/ to 10/sup -13/ cm/s. In addition, batch distribution ratios (R/sub d/) for Sr, Cs, Am, Np, I, U and Tc have been measured for a number of candidate backfill materials. Both initial permeability and sorption studies have used a synthetic basaltic ground water.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest Lab., Richland, WA (USA)
OSTI Identifier:
5718936
Report Number(s):
PNL-SA-9645; CONF-811122-44
ON: DE82005921; TRN: 82-007009
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the Materials Research Society, Boston, MA, USA, 16 Nov 1981
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE STORAGE; BACKFILLING; BENTONITE; CLAYS; HYDRAULICS; MIXTURES; PERMEABILITY; RADIONUCLIDE MIGRATION; SAND; UNDERGROUND STORAGE; DISPERSIONS; ENVIRONMENTAL TRANSPORT; FLUID MECHANICS; MANAGEMENT; MASS TRANSFER; MECHANICS; STORAGE; WASTE MANAGEMENT; WASTE STORAGE; 052002* - Nuclear Fuels- Waste Disposal & Storage

Citation Formats

Westsik, Jr, J H, Bray, L A, Hodges, F N, and Wheelwright, E J. Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials. United States: N. p., 1981. Web.
Westsik, Jr, J H, Bray, L A, Hodges, F N, & Wheelwright, E J. Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials. United States.
Westsik, Jr, J H, Bray, L A, Hodges, F N, and Wheelwright, E J. Thu . "Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials". United States.
@article{osti_5718936,
title = {Permeability, swelling, and radionuclide-retardation properties of candidate backfill materials},
author = {Westsik, Jr, J H and Bray, L A and Hodges, F N and Wheelwright, E J},
abstractNote = {A backfill placed between a nuclear waste canister and the host geology of a nuclear waste repository can impede the migration of water through the waste package and retard the movement of radionuclides into the geologic formation. Hydraulic conductivities and swelling pressures are being determined as functions of the density of the compacted backfill, temperature, radiation dose, hydraulic head and the chemical composition of the permeating fluid. Bentonite clays and bentonite/sand mixtures have received initial emphasis. Sodium bentonite and calcium bentonite samples compacted to a dry density of 2.1 q/cm/sup 3/ had hydraulic conductivities in the range of 10/sup -12/ to 10/sup -13/ cm/s. In addition, batch distribution ratios (R/sub d/) for Sr, Cs, Am, Np, I, U and Tc have been measured for a number of candidate backfill materials. Both initial permeability and sorption studies have used a synthetic basaltic ground water.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Conference:
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