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A new version of the FLUT-FDWR code, named FLUT-FDWR-MM, has been developed in KfK in order to reduce an oscillation trend observed in the predictions of the original code. In the new version, a finer mesh moving with the quench-front propagation is introduced into the heat conductor model. This version has been tested by means of post-test calculations of various reflooding experiments in both PWR (FEBA/SEFLEX, NEPTUN I and II) and APWR (NEPTUN III) geometries. The parameters R(v) and R(l) of Oseen's relation for interfacial drag between liquid and vapour phases are reoptimised for the new version.

Additional information

Authors: MORI T, Japan Atomic Energy Research Institute, Tokai-Mura, Naka-Gun, Ibaraki-Ken (JP);CIGARINI M, Mercedes Benz, Untertuerkheim, Stuttgart (DE);DALLE DONNE M, Kernforschungszentrum Karlsruhe, Institut fuer Neutronenphysik und Reaktortechnik (DE)
Bibliographic Reference: EUR 11396 EN (1990) 75 pp., MF, ECU 4
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