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German Contribution to Item 2 of the Agenda “Status of ... - IAEA

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Lehrstuhl für Reak<strong>to</strong>rsicherheit und –technik<br />

Univ.-Pr<strong>of</strong>. Dr. rer. nat. Hans-Josef Allelein<br />

Institut für Energie- und Klimaforschung<br />

Nukleare Entsorgung und Reak<strong>to</strong>rsicherheit (IEK-6)<br />

New Aspects <strong>of</strong> SHUFLE<br />

• Modelling <strong>of</strong> discharge tube<br />

• Differing flow velocities in azimuthal direction<br />

• Space dependent filling fac<strong>to</strong>r / densification <strong>of</strong> pebble bed<br />

• Tracking <strong>of</strong> single batches (multi fuel pass fuel strategy)<br />

• Simulation <strong>of</strong> conical pebble heap(s)<br />

• More precise modelling <strong>of</strong> stagnant zones<br />

1030°C<br />

900°C<br />

935°C<br />

Fig.: Fuel temperature distribution [2]<br />

Fig.: Stagnant zones [1]<br />

[1] Yang, X.: Experimental Investigation on Feasibility <strong>of</strong> Two-Region-Designed Pebble-Bed High-Temperature Gas-Cooled Reac<strong>to</strong>r, INET, 2008<br />

[2] Verfondern, K.: Numerische Untersuchung der 3-dimensionalen stationären Temperatur- und Strömungsverteilung im Core eines Kugelhaufen-Hochtemperaturreak<strong>to</strong>rs, 1984<br />

H.-J. Allelein<br />

TWG-GCR-23<br />

March 5-7, 2013, Vienna<br />

37

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