Simulation of the Single Phase Natural Circulation at the Secundary Side of an Emergency Condenser (NOKO Facility) Using the CFD-Code CFX-4


Simulation of the Single Phase Natural Circulation at the Secundary Side of an Emergency Condenser (NOKO Facility) Using the CFD-Code CFX-4

Aszodi, A.; Krepper, E.

The NOKO-Test facility is a rig for the test of passive components of nuclear power plants and is operated at the research centre J'lich. The facility is used for the experimental investigation of the emergency condenser of the SWR 600/1000, which is a new boiling water reactor design, developed by Siemens. The paper describes the numerical investigation of the natural circulation processes at the secondary side of the NOKO facility. Results of CFX-4 calculations are presented. They show, that during the operation of the emergency condenser a stable temperature stratification is evolving. At the lower part of the secondary side of the NOKO test facility even a dead volume is established. The fluid of this volume does not take part in the fluid circulation. The phenomena observed in the calculations were also found in the experimental results. Different changes of the tank configuration were investigated to reduce the effect of the temperature stratification.

  • Poster
    ENC'98 Nice October 1998, Poster Session 2.05
  • Contribution to proceedings
    ENC'98 Nice October 1998, Poster Session 2.05

Permalink: https://www.hzdr.de/publications/Publ-1329
Publ.-Id: 1329