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Co2 transport through the capillary fringe in sand

F. Caron

出版	AECL Research., 1994
URL	http://books.google.com.hk/books?id=1lVj0AEACAAJ&hl=&source=gbs_api

註釋

Much experimental information is available on the performance of uo2 fuel elements, some of which has been interpreted in terms of simple mathematical models. however, because of the interaction between experimental variables it is often difficult to identify the correlation between causes and effects; and it becomes necessary to identify the most probable cause by numerical evaluation of the effects of competing phenomena. numerical evaluation techniques for predicting fuel element performance are obviously useful in guiding fuel design, but at our present stage of development cannot replace proof testing or experimental investigations; rather, numerical evaluation should proceed along with experimental work, each throwing some insight into the physical processes in the system under study. a general description of the computer program to simulate fuel performance and the experimental data against which it was assessed has been given in reference(1); the purpose of the present report is to give a detailed breakdown of the logic and the way it is incorporated in the program, and to be a guide for potential users. readers are therefore advised to first read reference(1) to acquire a more general idea of the limitations and capabilities of the program. the program is written in fortran specifically for use on the crnl - cdc - 6600 computer. it predicts quantities such as sheath strain (due primarily to fuel thermal expansion, not swelling), fission product gas release and the resultant internal gas pressure, the possible effect of internal gas pressure on fuel-clad interfacial pressure and hence heat transfer, stress and strain in the clad, and the overall interactions of these variables to give the final quantities of interest; fuel temperatures, clad strain and fission product gas release. possible interactions are represented diagrammatically in figure 1, and described more thoroughly in the text following.