4SIGHT Manual: A Computer Program for Modelling Degradation of Underground Low Level Waste Concrete Vaults

Published

June 1, 1995

Author(s)

Kenneth A. Snyder, J R. Clifton

Abstract

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

Citation

NIST Interagency/Internal Report (NISTIR) - 5612

Report Number

5612

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

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Keywords

building technology, computer models, concretes, corrosion, corrosion of reinforcement, degradation, leaching, radioactive wastes, service life, sulfate attack

Citation

Snyder, K. and Clifton, J. (1995), 4SIGHT Manual: A Computer Program for Modelling Degradation of Underground Low Level Waste Concrete Vaults, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916573 (Accessed April 25, 2026)

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