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Abstract

A hydrodynamic fragmentation model has been developed which is based on the stripping of the crests of waves produced by shear flow instabilities at the surface of the melt drop. The comparison with experimental investigations supports this model at least for Weber numbers > 1000 with respect to the general features, the fragmentation times and the drift and deformation behavior of the drops of the melt. Incorporating this model in a steady state thermal detonation code, detonation cases for certain UO-2 - H-2O premixtures are determined, which deliver input values for analysing the load to structures in structural dynamics codes. The fragmentation model is also used + in addition to a thermal fragmentation model + in a transient thermal detonation code for determining the escalation behavior under given triggering conditions.

Additional information

Authors: BUERGER M, INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);CARACHALIOS C, INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);KIM D S, INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);UNGER H, INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);HOHMANN H, INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);SCHINS H INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY), INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY);JRC ISPRA ESTAB. (ITALY), INSTITUT FUER KERNENERGETIK UND ENERGIESYSTEME (IKE), UNIVERSITY OF STUTTGART (GERMANY);JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: FIFTH INTERNATIONAL MEETING ON THERMAL NUCLEAR REACTOR SAFETY, KARLSRUHE (GERMANY), SEPT. 9-13, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31720 ORA
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