An Experimental Investigation of Natural Convection Heat Transfer Within Horizontal Spent-Fuel Assemblies
- 1 December 1996
- journal article
- research article
- Published by Informa UK Limited in Nuclear Technology
- Vol. 116 (3), 306-318
- https://doi.org/10.13182/nt96-a35286
Abstract
Natural convection heat transfer is experimentally investigated in an enclosed horizontal rod bundle, which characterizes a spent-fuel assembly during transport and some dry storage scenarios. The objective of this experimental study is to obtain convection correlations that can be used to easily incorporate convective effects into analytical models of horizontal spent-fuel systems and also to investigate the physical nature of natural convection in enclosed horizontal rod bundles in general. The resulting data consist of correlations of convective Nusselt number, which are defined in terms of the maximum and average assembly temperatures. The correlations have been corrected for radiation heat transfer using a numerical technique. The data suggest the presence of conduction and convection regimes, distinguished by a critical Rayleigh number. The correlation of the convection regime suggests turbulent flow conditions. Predictions of maximum assembly temperature using the presented correlations are compared with additional experimental data obtained in a horizontal enclosed rod bundle. Further comparisons are made with predictions from the widely used Wooten-Epstein equation and a recently developed theoretical approach based on an effective thermal conductivity model. Favorable results are obtained, especially for thermal conditions that favor natural convection, such as relatively low enclosure temperatures and abovestandard atmospheric pressure.Keywords
This publication has 11 references indexed in Scilit:
- Natural convection heat transfer within horizontal spent nuclear fuel assembliesPublished by Office of Scientific and Technical Information (OSTI) ,1995
- Plume-rise effect on natural convection heat transfer in staggered arrays of circular heating elementsJournal of Thermophysics and Heat Transfer, 1990
- Single PWR spent fuel assembly heat transfer data for computer code evaluationsPublished by Office of Scientific and Technical Information (OSTI) ,1986
- An Experimental Study of Free Convection Heat Transfer From a Horizontal Cylinder in a Vertical Array Set in Free Space Between Parallel WallsJournal of Heat Transfer, 1983
- Scoping design analyses for optimized shipping casks containing 1-, 2-, 3-, 5-, 7-, or 10-year-old PWR spent fuelPublished by Office of Scientific and Technical Information (OSTI) ,1983
- Spent-fuel dry-storage testing at E-MAD (March 1978-March 1982)Published by Office of Scientific and Technical Information (OSTI) ,1982
- Effect of Vertical Separation Distance and Cylinder-to-Cylinder Temperature Imbalance on Natural Convection for a Pair of Horizontal CylindersJournal of Heat Transfer, 1981
- The Overall Convective Heat Transfer from Smooth Circular CylindersPublished by Elsevier BV ,1975
- Arrays of heated horizontal cylinders in natural convectionInternational Journal of Heat and Mass Transfer, 1972
- Interactions in natural convection from an array of heated elements, experimentalInternational Journal of Heat and Mass Transfer, 1969