47 research outputs found
The release code package REVOLS/RENONS for fission product release from a liquid sodium pool into an inert gas atmosphere
Zur Eingrenzung des radiologischen Quellterms bei auslegungsueberschreitenden Ereignissen in zukuenftigen Druckwasserreaktoren
Multidimensional simulation of hydrogen distribution and turbulent combustion in severe accidents
Summary of results for the SNEAK-9 series of critical experiments and conclusions for the accuracy of predicted physics parameters of the SNR-300
Fortschritte bei der Beherrschung und Begrenzung der Folgen auslegungsüberschreitender Ereignisse
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Sodium spray and jet fire model development within the CONTAIN-LMR code
An assessment was made of the sodium spray fire model implemented in the CONTAIN code. The original droplet burn model, which was based on the NACOM code, was improved in several aspects, especially concerning evaluation of the droplet burning rate, reaction chemistry and heat balance, spray geometry and droplet motion, and consistency with CONTAIN standards of gas property evaluation. An additional droplet burning model based on a proposal by Krolikowski was made available to include the effect of the chemical equilibrium conditions at the flame temperature. The models were validated against single-droplet burn experiments as well as spray and jet fire experiments. Reasonable agreement was found between the two burn models and experimental data. When the gas temperature in the burning compartment reaches high values, the Krolikowski model seems to be preferable. Critical parameters for spray fire evaluation were found to be the spray characterization, especially the droplet size, which largely determines the burning efficiency, and heat transfer conditions at the interface between the atmosphere and structures, which controls the thermal hydraulic behavior in the burn compartment