A Methodology for Accident Analysis of Fusion Breeder Blankets and Its Application to Helium-Cooled Lead–Lithium Blanket

Summary of the 2nd International Workshop on Environmental, Safety and Economic Aspects of Fusion Power

“…Dobromir Panayotov (F4E) discussed challenges of uncertainties evaluation in fusion safety studies. An approach to uncertainty evaluation based on the uncertainty identification and phenomena identification and ranking table (PIRT) and utilizing sensitivity studies has been reported as part of the comprehensive methodology for fusion breeding blanket (BB) accident analyses [8]. The proposed method consists of an expert review of areas of uncertainties followed by the performance of sensitivity analyses.…”

“…It addresses both the different sources of uncertainties-computer code models, system model representations, plant operating parameters and effect of scale as well as the specificity of the BB designs, materials, and phenomena. The applicability and robustness was demonstrated by the qualification of the models by comparison with finite element analyses and code-to-code comparisons and executed thus for sensitivity studies in HCLL [8] and HCPB [9] ITER test blanket systems (TBSs) specific accident scenarios: 32 h LOOP, LOFA and LOFA with aggravating failure of in-box LOCA. The reported advantages of the proposed method are its flexibility, practicality and progressive direct improved understanding.…”