Effect of Geometry Variation on Temperature Prediction in the TN-32 Used Nuclear Fuel Storage Cask

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" Effect of Geometry Variation on Temperature Prediction in the TN-32 Used Nuclear Fuel Storage Cask "
Higley, Megan Hadj-Nacer, Mustafa

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1106282
Doc. No	:	TLpq2384223815
Main Entry	:	Hadj-Nacer, Mustafa
	:	Higley, Megan
Title & Author	:	Effect of Geometry Variation on Temperature Prediction in the TN-32 Used Nuclear Fuel Storage Cask\ Higley, MeganHadj-Nacer, Mustafa
College	:	University of Nevada, Reno
Date	:	2019
student score	:	2019
Degree	:	M.S.
Page No	:	112
Abstract	:	During vacuum drying, low pressures in combination with the relatively high heat generation rate may cause the temperatures of the fuel cladding to exceed the limit of roughly 400°C set by the Nuclear Regulatory Commission. The low pressures (rarefied gas) conditions within the cask may induce an additional thermal resistance for heat transfer by conduction at the solid-gas interface, and it is this resistance, also called “temperature-jump,” that causes the temperature of the used nuclear fuel assemblies to increase considerably. The objective of this work is to accurately predict the peak cladding temperature during the low-pressure conditions associated with vacuum drying. Other models and experimental results indicate that the peripheral basket-rail gap is the most sensitive component in peak cladding temperature (PCT) prediction within the continuum regime, and its sensitivity is even more pronounced for rarefied conditions. Several geometrically-accurate two-dimensional computational fluid dynamics (CFD) models were built in order to predict PCTs under conditions associated with vacuum drying while taking into account a variety of probable gap geometries.
Subject	:	Mechanical engineering