Thermoelastic/Plastic Analysis of Waste-Container Sleeve. II. Influence of Large Displacements on Sleeve Loading. Technical Memorandum Report RSI-0017

摘要

Modification of the thermoelastic/plastic finite element program to account for large displacements possibly associated with the development of an extensive plastic zone about a radioactive waste container emplaced in a typical repository room (SALT-4/T model) has been completed. Comparisons of radial stresses acting on the waste container and borehole wall displacements computed by the modified and conventional analyses techniques reveal little difference between the two sets of results over a 10 year heating period. Because no significant differences in results arise even under these exaggerated conditions, the more costly large displacement option need be used only sparingly as an occasional control check on the conventional procedure. As a consequence, economy of computer run time can be maintained without sacrifice of accuracy. (ERA citation 03:000327)