Dr. Sören Kliem
Head Reactor Safety
Phone: +49 351 260 - 2318
Fax: +49 351 260 - 12318

Reactor Safety


  • Development, validation and application of the code complex DYN3D-ATHLET

    The reactor dynamics code DYN3D has been developed at the Institute of Safety Research and coupled with the thermohydraulic system code ATHLET of the Gesellschaft für Anlagen- und Reaktorsicherheit. This coupled code complex can be used for the analysis of a broad spectrum of transients in Light Water Reactors. DYN3D is available in two versions - for Russian VVER type reactors and western LWRs. The validation is accomplished on international code comparisons (benchmark exercises) as well as on the comparison of calculations with measurement data from transients in nuclear power plants. Presently, a code version with multiple energy groups and SP3 neutron transport approximation is being developed. The DYN3D code has been integrated into the European code platform NURESIM.

    Other actual objectives are:
    • the analysis of hypothetical reactivity initiated transients like boron dilution events and anticipated transient without scram,
    • investigations on the minimisation of the actinides inventory in Light Water Reactors (EU project LWR-DEPUTY),
    • development of DYN3D versions for molten salt reactors and gas-cooled high temperature reactors


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FWOR Jörg Konheiser Evgeny Nikitin André Gommlich Dr. Bruno Merk Dr. Alexander Grahn Alexander Hoffmann Reuven Rachamin Dr. Silvio Baier Kerstin Kurde Dr. Emil Fridman Dr. Frank Schäfer Dzianis Litskevich Dr. Sören Kliem Yaroslav Kozmenkov


NameBld./Office+49 351 260Email
Kliem Dr., Sören250/1082318


NameBld./Office+49 351 260Email
Baier Dr., Silvio250/1113034
Bilodid Dr., Yurii250/2092020
Fridman Dr., Emil250/2092167
Gommlich, André250/2073419
Grahn Dr., Alexander250/1112331
Hoffmann, Alexander250/1102815
Jobst, Matthias250/1153572
Konheiser, Jörg250/2142416
Kozmenkov, Yaroslav250/1152502
Kurde, Kerstin250/1073025
Mittag Dr.,
Müller Dr., Stefan250/2142407
Nikitin, Evgeny250/2072906
Rohde Dr.,
Schäfer Dr., Frank250/1172069
Wilhelm Dr., Polina250/1133291


Dr. Sören Kliem
Head Reactor Safety
Phone: +49 351 260 - 2318
Fax: +49 351 260 - 12318