[en] The international Phebus FP programme of integral LWR severe accident experiments uses real core materials and scaled, well instrumented primary circuit and containment models. The first tests, FPT0 and FPT1, were performed respectively in December 1993 and July 1996. The experimental conditions were very similar in both tests: low pressure (∼0.2 MPa) and steam-rich environment (oxidising conditions), and the test fuel and control rod bundles was brought to a severely degraded state. Test FPT4 measured the releases of low volatile fission products and of actinides from a solid debris bed of irradiated fuel and from a molten pool. Test FPT2 will be performed in mid-2000. An expert group has reviewed the first results, assessed their potential impact on safety studies and accident management strategy, and made recommendations for the future experiments of the programme and for future in-pile programmes as well. In this way guidance was obtained for the analysis of the experimental database and for the conditions of future tests. (author)