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Abstract

In-pile or out-of-pile experiments for simulating severe accidents, characterized by slow coolant boildown, core uncovery and possible subsequent fuel melting, are performed with test bundles consisting of a quite limited number of fuel rods. Significant three-dimensional perturbations of the flow and temperature field in such small rod bundles may complicate the application of the experimental results to the reactor situation. The computer programme VELASCO, presented in this paper, deals with three-dimensional transient vapour flow in bundles. Parameter studies and an analysis of the PBF scoping test show that this tool is adequate for assessing the importance of three-dimensional effects in small fuel rod bundles.

Additional information

Authors: EIFLER W JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: 5TH 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 31664
Availability: Can be ordered online
Record Number: 1989123011000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en