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OECD/NEA Sandia Fuel Project phase I: Benchmark of the ignition testing
Adorni, M.,Herranz, L.E.,Hollands, T.,Ahn, K.I.,Bals, C.,D'Auria, F.,Horvath, G.L.,Jaeckel, B.S.,Kim, H.C.,Lee, J.J.,Ogino, M.,Techy, Z.,Velazquez-Lozad, A.,Zigh, A.,Rehacek, R. North-Holland Pub. Co 2016 Nuclear engineering and design Vol.307 No.-
The OECD/NEA Sandia Fuel Project provided unique thermal-hydraulic experimental data associated with Spent Fuel Pool (SFP) complete drain down. The study conducted at Sandia National Laboratories (SNL) was successfully completed (July 2009 to February 2013). The accident conditions of interest for the SFP were simulated in a full scale prototypic fashion (electrically heated, prototypic assemblies in a prototypic SFP rack) so that the experimental results closely represent actual fuel assembly responses. A major impetus for this work was to facilitate severe accident code validation and to reduce modeling uncertainties within the codes. Phase I focused on axial heating and burn propagation in a single PWR 17x17 assembly (i.e. ''hot neighbors'' configuration). Phase II addressed axial and radial heating and zirconium fire propagation including effects of fuel rod ballooning in a 1x4 assembly configuration (i.e. single, hot center assembly and four, ''cooler neighbors''). This paper summarizes the comparative analysis regarding the final destructive ignition test of the phase I of the project. The objective of the benchmark is to evaluate and compare the predictive capabilities of computer codes concerning the ignition testing of PWR fuel assemblies. Nine institutions from eight different countries were involved in the benchmark calculations. The time to ignition and the maximum temperature are adequately captured by the calculations. It is believed that the benchmark constitutes an enlargement of the validation range for the codes to the conditions tested, thus enhancing the code applicability to other fuel assembly designs and configurations. The comparison of lumped parameter and CFD computer codes represents a further valuable achievement.
Tubular inorganic nanostructures
I. Kiricsi,D. Fudala,D. Mehn,A. Kukovecz,Z. Konya,M. Hodos,E. Horvath,M. Urban,T. Kanyo,E. Molnar,R. Smajda 한국물리학회 2006 Current Applied Physics Vol.6 No.2
Tubular inorganic nanostructures are high aspect ratio nanomaterials possessing few nanometer wide inner channels. We reporton our studies about engineering the chemical composition, morphology and pore size of carbon, silica and titania nanotubes as wellas of mesoporous silicate MCM-41. The former three systems represent three dierent classes of inorganic nanotubes, since theyexhibit superior catalyst support properties as well.