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The computer programs TRAC-FP1/MOD1 and QFLOOD have been used to analyse data obtained from two reflood rigs: PERICLES, a 7-51 bundle arranged to investigate the chimney effect, and REFLEX, a single heated tube. TRAC produced poor predictions for PERICLES, the calculated temperature history curves at the 2.03 m elevation differing markedly from experiment. TRAC predictions from the REFLEX base case agreed quite well with experiment, but for a second REFLEX test, at higher inlet water flowrate, TRAC greatly overpredicted the quench front speed. QFLOOD also performed badly against PERICLES, quench time being overpredicted by more than 50%. A number of sensitivity studies were carried out in order to establish the source of the error in the modelling. Several possible explanations were investigated, but definite conclusions could not be drawn. QFLOOD predictions for REFLEX were generally satisfactory.

Additional information

Authors: THOMAS R M, Central Electricity Research Laboratories, Leatherhead, Surrey (GB)
Bibliographic Reference: EUR 12400 EN (1989) 216 pp., FS, ECU 16.25
Availability: (2)
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