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Abstract

As part of the LWR safety programme of the JRC, the advanced thermalhydraulic system codes, CATHARE and DRUFAN, are being assessed at JRC Ispra. The aim of the exercise is to check whether the two codes can calculate, with sufficient accuracy, the phenomena occurring in a small break loss of coolant accident (LOCA) in a power plant. The ability of procedures to mitigate the extent of the accident can then be evaluated. Both integral tests and supportive separate effect studies have been carried out. The separate studies were performed to investigate specific phenomena in order to check the codes' results against both separate effect tests and analytic solutions. The bulk of the work, however, has involved performing pre- and post-test predictions of a series of small break LOCAs performed in the JRC Ispra LOBI loop. In general CATHARE and DRUFAN predicted the experimental results rather well. A major contribution to these results was the good performance of the critical flow model in both codes. These managed to calculate the flowrate out of the break without resorting to tuning.

Additional information

Authors: DUFFIELD J S, JRC ISPRA ESTAB. (ITALY);SHEPHERD I M, JRC ISPRA ESTAB. (ITALY);FRIZ G, JRC ISPRA ESTAB. (ITALY);EIFLER W, JRC ISPRA ESTAB. (ITALY);NIJSING R JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: INTERNATIONAL CONFERENCE ON THERMAL REACTOR SAFETY, AVIGNON (FRANCE), OCT. 2-7, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG-XIII-C-3, POB 1907, MENTIONING PAPER EN 34108 ORA
Availability: Can be ordered online
Record Number: 1989126107300 / Last updated on: 1989-06-01
Category: PUBLICATION
Available languages: en