4SIGHT Manual: A Computer Program for Modelling Degradation of Underground Low Level Waste Concrete Vaults.
4SIGHT Manual: A Computer Program for Modelling
Degradation of Underground Low Level Waste Concrete
Snyder, K. A.; Clifton, J. R.
NISTIR 5612; 73 p. June 1995.
Available from: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
Order number: PB95-231593
building technology; computer models; concretes;
corrosion; corrosion of reinforcement; degradation;
leaching; radioactive wastes; service life; sulfate
A computer program has been written to facilitate
performance assessment of concrete vaults used in Low
Level Waste (LLW) disposal faciliites. The computer
program is a numerical computer model of degradation in
concrete. A one-dimensional finite difference equation
is used to propagate ions by precipitation/dissolution
of available salts. The precipitation/dissolution of
salts, in turn, changes the transport properties, which
changes the rate of ion transport. The result is a
model which incorporates the synergism of multiple
degradation mechanisms. This Report is self-contained.
It includes the installation instructions, user manual,
technical details, and source code. The program was
written using a literate programming tool and the
"pretty-printing" output of the source code is attached
at the end of this report.