Theoretical models to predict the transient heat transfer performance of HIFAR fuel elements under non-forced convective conditions

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dc.contributor.authorGreen, WJen_AU
dc.date.accessioned2007-11-22T04:15:32Zen_AU
dc.date.accessioned2010-04-30T04:32:55Zen_AU
dc.date.available2007-11-22T04:15:32Zen_AU
dc.date.available2010-04-30T04:32:55Zen_AU
dc.date.issued1987-04en_AU
dc.description.abstractSimple theoretical models have been developed which are suitable for predicting the thermal responses of irradiated research fuel elements of markedly different geometries when they are subjected to loss-of-coolant accident conditions. These models have been used to calculate temperature responses corresponding to various non-forced convective conditions. Comparisons between experimentally observed temperatures and calculated values have shown that a suitable value for surface thermal emissivity is 0.35; modelling of the fuel element beyond the region of the fuel plate needs to be included since these areas account for approximately 25 per cent of the thermal power dissipated; general agreement between calculated and experimental temperatures for both transient and steady-state conditions is good - the maximum discrepancy between calculated and experimental temperatures for a HIFAR Mark IV/V fuel element is approx 70 deg C and for an Oak Ridge Reactor (ORR) box-type fuel element approx 30 deg C; and axial power distribution does not significantly affect thermal responses for the conditions investigated. Overall the comparisons have shown that the models evolved can reproduce experimental data to a level of accuracy that provides confidence in the modelling technique and the postulated heat dissipation mechanisms and that these models can be used to predict thermal responses of fuel elements in accident conditions that are not easily investigated experimentally.en_AU
dc.identifier.citationGreen, W. J. (1987). Theoretical models to predict the transient heat transfer performance of hifar fuel elements under non-forced convective conditions (AAEC/E646). Lucas Heights, NSW: Australian Atomic Energy Commission Research Establishment, Lucas Heights Research Laboratories.en_AU
dc.identifier.govdoc365en_AU
dc.identifier.isbn0642598592en_AU
dc.identifier.otherAAEC-E-646en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/245en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectFuel elementsen_AU
dc.subjectLoss of coolanten_AU
dc.subjectTheoretical dataen_AU
dc.subjectReactor accidentsen_AU
dc.subjectHIFAR Reactoren_AU
dc.subjectFuel platesen_AU
dc.subjectThermal conductionen_AU
dc.titleTheoretical models to predict the transient heat transfer performance of HIFAR fuel elements under non-forced convective conditionsen_AU
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