TITLE

Using Coupled Mesoscale Experiments and Simulations to Investigate High Burn-Up Oxide Fuel Thermal Conductivity

AUTHOR(S)
Teague, Melissa; Fromm, Bradley; Tonks, Michael; Field, David
PUB. DATE
December 2014
SOURCE
JOM: The Journal of The Minerals, Metals & Materials Society (TM;Dec2014, Vol. 66 Issue 12, p2569
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Nuclear energy is a mature technology with a small carbon footprint. However, work is needed to make current reactor technology more accident tolerant and to allow reactor fuel to be burned in a reactor for longer periods of time. Optimizing the reactor fuel performance is essentially a materials science problem. The current understanding of fuel microstructure have been limited by the difficulty in studying the structure and chemistry of irradiated fuel samples at the mesoscale. Here, we take advantage of recent advances in experimental capabilities to characterize the microstructure in 3D of irradiated mixed oxide (MOX) fuel taken from two radial positions in the fuel pellet. We also reconstruct these microstructures using Idaho National Laboratory's MARMOT code and calculate the impact of microstructure heterogeneities on the effective thermal conductivity using mesoscale heat conduction simulations. The thermal conductivities of both samples are higher than the bulk MOX thermal conductivity because of the formation of metallic precipitates and because we do not currently consider phonon scattering due to defects smaller than the experimental resolution. We also used the results to investigate the accuracy of simple thermal conductivity approximations and equations to convert 2D thermal conductivities to 3D. It was found that these approximations struggle to predict the complex thermal transport interactions between metal precipitates and voids.
ACCESSION #
99619633

 

Related Articles

  • "MOX for Peace" a Reality. Bariteau, Jean-Pierre // Nuclear Plant Journal;Jan/Feb2006, Vol. 24 Issue 1, p35 

    The article reports on the construction of a Mixed Oxide (MOX) Fuel Fabrication facility which will be operated at the Department of Energy Savannah River Site near Aiken, South Carolina. The Department of Energy contracted with Duke, COGEMA, Stone and Webster (DCS) to design the facility. The...

  • Between MOX and a hard place. Reparaz, Adolfo // Bulletin of the Atomic Scientists;Sep/Oct2003, Vol. 59 Issue 5, p46 

    Focuses on the controversy surrounding the mixed oxide (MOX) fuel program of the U.S. and Russia. Use of MOX in commercial nuclear power reactors; History of MOX; Economic aspects of the U.S-Russia MOX fuel agreement.

  • PUT THE MOCKERS ON MOX.  // Ecologist;Jun2001, Vol. 31 Issue 5, p17 

    Reports that the Friends of the Earth (FoE) organization has demanded a full disclosure of the plan of British Nuclear Fuel Ltd. (BNFL) to develop mixed-oxide fuel reactors. BNFL plant that could develop the fuel reactors according to FoE.

  • Sellafield MOX forced to close.  // ENDS (Environmental Data Services);Aug2011, Issue 439, p14 

    The article reports on the closure of the Sellafield plutonium-uranium mixed oxide (MOX) nuclear fuel manufacturing plant in Cumbria, England after the Fukushima disaster in Japan left it without any customers. It cites the need for a plant to be built and operated for 30 years. The MOX was the...

  • NuScale study confirms suitability of SMR design to use MOX fuel. Nathan, Stuart // Engineer (Online Edition);1/25/2016, p1 

    The article reports that Great Britain's plutonium stockpile could be used to fuel a new design of small modular reactor proposed by American company NuScale Power. The firm reported that its small modular reactor (SMR) design has been evaluated for partial or full fuelling with mixed uranium...

  • Continuous process of powder production for MOX fuel fabrication according to “GRANAT” technology. Morkovnikov, V. E.; Raginskiy, L. S.; Pavlinov, A. P.; Chernov, V. A.; Revyakin, V. V.; Varikhanov, V.; Revnov, V. N. // AIP Conference Proceedings;2000, Vol. 532 Issue 1, p199 

    The paper deals with the solution to the problem of a continuous pilot plant development for mixed oxide fuel powder production on the basis of the home “GRANAT” technology, which had been tested before on a small-scale pilot-commercial batch-operated plant of the same name and...

  • HEU Commercial Down-blending -- A Non-Proliferation Winner! Person, Gary A.; George, Robert // Proceedings of the Institute of Nuclear Materials Management Ann;2010, p1 

    Over the past decade, the National Nuclear Security Administration's (NNSA) Surplus U.S. Highly Enriched Uranium (HEU) Disposition Program has eliminated 118 metric tons of surplus U.S. weapons-usable HEU by down-blending it to low-enriched uranium (LEU) for use in power and research reactors in...

  • Mixing it up: American nuclear power gets a lesson in MOX. Davis, Kathleen // Electric Light & Power;May2003, Vol. 81 Issue 5, p1 

    Discusses the use of mixed oxide (MOX) fuel in relation to nuclear energy in the U.S. Contract signed by the Department of Energy with a consortium led by Duke Energy for the design of a commercial MOX fuel; Composition of the MOX nuclear fuel; Eventual deactivation of a mixed oxide fuel...

  • German Nuclear Waste May be Headed to Savannah River Site.  // Nuclear Waste News;5/6/2014, Vol. 34 Issue 8, p1 

    The article reports on the negotiations between the German and U.S. governments for the proposed highly radioactive nuclear waste shiploads from German prototype reactor to the Savannah River Site (SRS) in South Carolina. SRS spokesperson Jim Giusti reveals the statement of interest signed by...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics