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Title: Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions

Abstract

In a final repository for spent nuclear fuel, the waste canister may be surrounded by some backfill. For low-permeability backfills, the transport of dissolved species such as corrosive agents for radionuclides leached after canister penetration is faster by diffusion than by flow. In fissured rock the migrating species will have a large cross-section area for transport while in the bulk of the backfill, but a very small area for transport at the mouth of the fissure. A somewhat idealized physical model has been used as a basis for a mathematical model that has been solved analytically. It shows the influence of fissure widths, backfill thickness, and distance between fissures. Some calculations are performed using some geometrical configurations of interest. They show that the influence of fissure width on the transport rate is small.

Authors:
Publication Date:
Research Org.:
Royal Inst. of Tech., Dept. of Chemical Eng., S-100 44 Stockholm
OSTI Identifier:
5907489
Resource Type:
Journal Article
Journal Name:
Nucl. Technol.; (United States)
Additional Journal Information:
Journal Volume: 72:2
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; RADIOACTIVE WASTE DISPOSAL; RADIONUCLIDE MIGRATION; ROCKS; SOILS; SPENT FUELS; UNDERGROUND DISPOSAL; BACKFILLING; DIFFUSION; DISSOLUTION; FRACTURES; LEACHING; MATHEMATICAL MODELS; PERMEABILITY; RADIOACTIVE WASTE FACILITIES; ROCK MECHANICS; ROCK-FLUID INTERACTIONS; SPENT FUEL CASKS; STRUCTURAL MODELS; THICKNESS; CASKS; CONTAINERS; DIMENSIONS; ENERGY SOURCES; ENVIRONMENTAL TRANSPORT; FAILURES; FUELS; MANAGEMENT; MASS TRANSFER; MATERIALS; MECHANICS; NUCLEAR FACILITIES; NUCLEAR FUELS; REACTOR MATERIALS; SEPARATION PROCESSES; WASTE DISPOSAL; WASTE MANAGEMENT; 052002* - Nuclear Fuels- Waste Disposal & Storage; 510301 - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- Soil- (-1987)

Citation Formats

Neretnieks, I. Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions. United States: N. p., 1986. Web.
Neretnieks, I. Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions. United States.
Neretnieks, I. Sat . "Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions". United States.
@article{osti_5907489,
title = {Stationary transport of dissolved species in the backfill surrounding a waste canister in fissured rock: Some simple analytical solutions},
author = {Neretnieks, I.},
abstractNote = {In a final repository for spent nuclear fuel, the waste canister may be surrounded by some backfill. For low-permeability backfills, the transport of dissolved species such as corrosive agents for radionuclides leached after canister penetration is faster by diffusion than by flow. In fissured rock the migrating species will have a large cross-section area for transport while in the bulk of the backfill, but a very small area for transport at the mouth of the fissure. A somewhat idealized physical model has been used as a basis for a mathematical model that has been solved analytically. It shows the influence of fissure widths, backfill thickness, and distance between fissures. Some calculations are performed using some geometrical configurations of interest. They show that the influence of fissure width on the transport rate is small.},
doi = {},
journal = {Nucl. Technol.; (United States)},
number = ,
volume = 72:2,
place = {United States},
year = {1986},
month = {2}
}