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First wall energy deposition during vertical displacement events on ITERCoburn, Jonathan ...The beryllium (Be) first wall energy deposition and melt damage profiles resulting from the current quench phase of an unmitigated, 5 MA/1.8 T upward vertical displacement event for ITER are ... investigated. Time dependent 2D magnetic flux profiles are calculated with the DINA code and used as input for the SMITER 3D field line tracing software. 3D maps of the wetted area and perpendicular heat flux q show that the majority of the energy deposition occurs on the upper first wall panels #8 and #9. SMITER simulations predict q[sub]peak 190 MW m [sub]-2 on the surfaces of upper FWPs #8 and #9 at the end of the ~ 450 ms current quench. The surface heat flux maps generated by SMITER are used as input in the MEMOS-U code, which models Be melt formation and dynamics. Simulations reveal peak surface temperatures of ~ 2200 K, inward surface damage of ~ 0.5 mm in depth, and average melt velocities of ~ 2ms [sub]-1 . Although VDEs are in principle the easiest disruptive instability to avoid, the analysis demonstrates that any non-mitigated events or intentional VDEs taking place during low I[sub]p, early operational phases of ITER for the purposes of estimating disruption forces, must be kept to a low number.Source: Physica scripta. - ISSN 0031-8949 (Vol. 2020, no. T171, Jan. 2020, str. 1-6)Type of material - article, component part ; adult, seriousPublish date - 2020Language - englishCOBISS.SI-ID - 28850179
Author
Coburn, Jonathan |
Thoren, E. |
Pitts, Richard |
Anand, H. |
Lehnen, M. |
Kos, Leon, 1966- |
Brank, Matic |
Ratynskaia, S. |
Tolias, Panagiotis
Topics
current quench |
melt motion |
first wall |
heat load |
SMITER |
MEMOS-U |
DINA
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Coburn, Jonathan | |
Thoren, E. | |
Pitts, Richard | |
Anand, H. | |
Lehnen, M. | |
Kos, Leon, 1966- | 12725 |
Brank, Matic | 53102 |
Ratynskaia, S. | |
Tolias, Panagiotis |
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