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- Safety assessment (5)
- Container design (4)
- Ductile iron (4)
- Dynamic loading conditions (4)
- Fracture mechanics (4)
- Behälterdesign (3)
- Bruchmechanik (3)
- Duktiles Gusseisen (3)
- Dynamische Belastungsbedingungen (3)
- Sicherheitstechnische Bewertung (3)
- Damping concrete (2)
- Drop test (2)
- Mechanische Bewertung (2)
- Numerische Analyse (2)
- Radioaktives Material (2)
- Accident (1)
- Blast wave (1)
- Cask design (1)
- Ductile cast iron (1)
- Dynamic (1)
- Dynamic load conditions (1)
- Finite element analysis (1)
- Impact limiter (1)
- KONRAD (1)
- Material characterisation (1)
- Penetration (1)
- Referenzprüfstandfundament (1)
- Transport spent fuel cask (1)
- Typ B(U)-Verpackung (1)
Practical methods for the safety assessment of postulated crack-like material defects of cubic containers made of ductile cast iron are presented. A formula for the stress intensity factor of a crack in a fillet with a radius from 20 to 200 mm under static load conditions is given. From that, an assessment diagram is derived for the critical depth of a crack in a fillet. The formula may be used to estimate the stress intensity factor of a dynamically loaded crack for special cases. As an application the results of the estimation procedure are compared with the results of a dynamic finite element calculation.
The safety and integrity of casks for radioactive waste in accidental scenarios is analysed by BAM Federal institute tor Materials Research and Testing. An accidental scenario in German interim storage facilities is the drop from a crane during the handling operation. To reduce the mechanical loads to the cask a shock absorbing footing with high energy absorption capability is used in these areas. In order to analyse and evaluate such impact scenarios of casks, numerical simulations are performed. For a comprehensive simulation of an accidental scenario the behaviour of the damping concrete footing has to be taken into account as well and therefor a material model is needed. Material parameters under different loading conditions are the basis for a numerical model. For that reason a government funded research project (Kasparek, 2012) was conducted to characterise damping concrete under quasi-static as well as highly dynamic impact loading conditions. The performed tests include compression tests with and without lateral constraint small-scale and midscale penetration tests with different indenters, and finally a full-scale drop test onto a damping concrete footing.