[en] The analysis results of the recently completed Phase I for the Project Fracture Analysis of Large Scale International Reference Experiments (FALSIRE) are summarized in a comparative manner. Thirty-nine analyses of the pressurized thermal shock experiments NKS-3 and NKS-4 from MPA-Stuttgart (FRG), PTSE-2 from ORNL and spinning cylinder SC-I and SC-II from AEA-Technology (UK) have been evaluated. The discussion of the results has been focused on the discrepancies of the finite element results and on comparisons with the estimation scheme analyses. A set of quantities like crack mouth opening (CMOD), strains, stresses, J-integral and constraint have been selected and compared for the different analyses to approximate the structural behaviour of the test specimens and the fracture behaviour of the cracks. A database of the results has been established. The influence of boundary conditions, approximation of material properties and calculational methods is shown in detail. The structure mechanics behaviour of the test specimens could be approximated well in case of NKS experiments but not in PTSE-2. Most differences between the various analyses could be explained. The applications of J_R methodology to predict crack extension was partially successful in some cases (NKS experiments) but not in others (PTSE-2). Fracture assessments based on CT-specimens overestimate stable crack growth in the case of NKS-4 and SC-I/II, because the crack resistance in the large scale test specimens is bigger than predicted by small specimens (e.g. CT-25). SC-I/II fracture results show that crack growth can be described quite well with the J-integral and the J_R-curves of the large scale test specimen. Therefore, future work has to be concentrated on extension of the J_R methodology by a parameter which controls the geometry and load dependence of the crack resistance. This can only be achieved by close connection between numerical simulation and fracture mechanics testing