Contact

Dr. Sören Kliem

Head
Reactor Safety
s.kliemAthzdr.de
Phone: +49 351 260 2318

Department of Reactor Safety

Research

Neutron physics and reactor dynamics


  • Validation and application to light water reactors and innovative reactor concepts of the Monte Carlo code SERPENT2
  • Application of the deterministic lattice code HELIOS-2
  • Development, verification and application of the in-house reactor dynamics code DYN3D
  • Extension of the DYN3D code to innovative reactor concepts
  • Coupling of DYN3D to the system code ATHLET
  • Coupling of DYN3D to the Computational Fluid Dynamics codes ANSYS CFX and TRIO_U

Plant dynamics and severe accident analysis

  • Accident analysis and analysis of plant dynamics using the ATHLET system code
  • Assessment of the impact of severe accident management measures on the progression of severe accidents in PWRs and VVERs

Monte-Carlo simulations (n- / γ-field calculations)


  • Development of the in house Monte Carlo code TRAMO
  • Fluence calculations of the of the reactor pressure vessel and internals using MCNP and TRAMO
  

Latest publication

Verification of nTRACER/COBRA-TF with Serpent2/SUBCHANFLOW for full core high fidelity high-resolution analysis of VVERs

Papadionysiou, M.; Bilodid, Y.; Fridman, E.; Pautz, A.; Hursin, M.

Abstract

This work illustrates the verification of the nTF/CTF multi-physics core solver for full core VVER-1000 analysis and more specifically the X2 benchmark. The coupled code system is compared with a solver of similar capabilities, Serpent2/SCF. The differences in the models and in the methods employed by the multi-physics core solvers are discussed in detail. Their impact is studied by comparing nTF/CTF with Serpent2/SCF for single VVER assembly calculations with different modeling options. Then, the two code systems are compared for the Hot Full Power (HFP) state of the X2 benchmark, which includes two phases, one with default modeling options for all codes, and one with consistent modeling options. Overall, nTF/CTF presents good agreement with Serpent2/SCF, in terms of power, temperature and boron concentration. The existing discrepancies can be partly attributed to the different methods and correlations used by the codes involved in the coupled code systems.

Keywords: High-resolution; Multi-physics; nTRACER; COBRA-TF; VVER

Involved research facilities

  • Data Center

Permalink: https://www.hzdr.de/publications/Publ-41062

More publications

Team

Head

NameBld./Office+49 351 260Email
Dr. Sören Kliem250/1082318
s.kliemAthzdr.de

Employees

NameBld./Office+49 351 260Email
Dr. Yurii Bilodid250/2092020
y.bilodidAthzdr.de
Dr. Emil Fridman250/2092167
e.fridmanAthzdr.de
Jörg Konheiser250/1092416
j.konheiserAthzdr.de
Kerstin Kurde250/1073025
k.kurdeAthzdr.de
Dr. Evgeny Nikitin250/2072906
e.nikitinAthzdr.de
Dr. Frank Schäfer250/1172069
f.schaeferAthzdr.de