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          NRC Library  Document Collections  NUREG-Series Publications  Publications Resulting from International AgreementsNumerical Analysis of Mixing Factors in the RPV of VVER-440 Reactor Using the TRACE Code (NUREG/IA-0235)

On this page: Publication Information AbstractDownload complete document NUREG/IA-0235 (PDF - 4.18 MB)Publication Information **Manuscript Completed:**April 2010**Date Published:**May 2010 **Prepared by:** P. Heralecky, M. Blaha TES Ltd Prazska 597 674 01 Trebic, Czech Republic A. Calvo, NRC Project Manager **Prepared for:** Division of Systems Analysis Office of Nuclear Regulatory Research  U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Availability Notice Abstract Experimental investigations of coolant mixing under steady state conditions at the Dukovany (Czech Republic) VVER-440 NPP were performed. The main goal of these experiments was to evaluate the mixing factors under normal operations condition. An extensive TRACE input deck of VVER-440/213 reactor was developed in frame of R&D project 1H-PK/61 in the TES Company. The TRACE input deck of VVER-440/213 reactor includes the reactor pressure vessel, the core and all important RPV internals. This paper contains some post-test analyses of the NPP Dukovany experiments using TRACE code V4.160 in order to generate background data for the forthcoming standardization procedure. There was performed a RPV nodalisation study to analyze influence of division of RPV into theta-parts on the calculated mixing factor. The purpose of performed TRACE analyses is to assess the capability of the TRACE code and the developed input deck to solve coolant mixing problems in VVER-440 type of reactors. 
      
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