JRC ISPRA RESULTS FROM ASSESSMENT OF RELAP5 - MOD2 ON THE BASIS OF LOBI TEST DATA
In the framework of the LOBI project, various RELAP5 code versions have been used extensively for test design calculations, pre-test predictions and post-test analysis. Important results from assessment calculations and code sensitivity studies performed in 1986/87 with RELAP5/MOD2 are presented in this paper. The assessment cases include Small Break LOCA and Special Transients Experiments. From the comparison of measured and predicted parameters, conclusions are drawn on the prediction capabilities of RELAP5/MOD2. Specific problems observed with regard to the automatic time-step control, flow regime selection, interphase heat transfer and break mass flow calculations are analysed. The significance of these deficiencies are described and recommendations are given for the improvement of the RELAP5 code.
Bibliographic Reference: 15TH WATER REACTOR SAFETY INFORMATION MEETING, GAITHERSBURG, MARYLAND/USA, OCT. 26-29, 1987, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33711 E
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Record Number: 1989126070400 / Last updated on: 1989-05-01
Available languages: en