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The aim of our work was to study the applicability of the Beremin-model forpredicting the brittle fracture behaviour of ferritic cast steel used for spent nuclear fuelcontainers, and to study the sensitivity of the model for different material parameters. Themodel parameters were determined according the recommended ESIS procedure on thebasis of experiments on notched tensile specimens performed at –160 °C. The fractureloads and fracture probabilities of V-notched Charpy-type specimens were determined andcompared with experimental data. The effect of material parameters, i.e. yield stress andstrain hardening exponent on the model parameters and the prediction results was alsoinvestigated. Also it was analysed how the applied numerical procedure affects the results.As it was found, the strain hardening exponent has small effect on the model parameters,the yield stress has stronger effect. The accuracy of the prediction mostly depends on thevariation of the yield stress.