UNIVERSITÀ DI PISAUNIVERSITÀ DI PISAG
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Recent Applications of Recent Applications of RELAP5-3D at GRNSPGRELAP5-3D at GRNSPG
N.Muellner
2011 RELAP5 International User’s Group Seminar And Meeting
Salt Lake City, UT, July 25-28, 2011
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RELAP5 International User's Group Seminar and Meeting, Salt Lake City, UT, July 25-28, 2011
CONTENTS Introduction
Fast Data Access (HDF5 file format)
3DS Viewer
Conclusions
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Introduction CNA2 – Chapter 15 FSAR – one of the
main projects of GRNSPG 2007-2010
Relap5-3D main tool for analysis
Applications (incomplete list) Three different nodalizations for RCS 3D Neutronics Coupling to code modelling I&C
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The Atucha-2 NPPThe Atucha-2 NPP2 LOOPS 1 MCP, 1 UT SG each
1 PRZ
2160 MWth1958 + 203 (nom. mod. T), or2001 + 160 (max mod T) +14 from MCP
451 separated FC
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The Atucha-2 NPPThe Atucha-2 NPP
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83 NPPScenarios
THE BEPU PROCESSTHE POSTULATED INITIATING EVENTS (PIE)
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IntroductionRELAP5-3D – Calculation of Temperatures, Pressures, Mass flows etcMultiple Timesteps inside“Control-timestep”
DYNETZ – calculation ofSignals from Control System
Ovars:TemperaturesPressuresMassflows
Ivars:Valve postionsPumps on/offPRZ Heaters
& Spray
DRIVER-PROGRAM
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Introduction Results 2007-2011, apart from FSAR
Chapter 15 - data of several TB
2011 Activities – Qualification Consolidate data bases Visualization
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Fast Data Access & Quality Control
Need to organize data
HDF5 data format chosen Open format supported by plotting
software such as Tecplot User can determine data structure Possibility to save all data which are part
of one calculation in one file
Controls may be imposed when file is created
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Fast Data Access & Quality Control
HDF5 ideal for large data sets B-Tree (generalization of a binary search tree) Chunking may be enabled (file sensitive to size
of chunks) At the moment, we could reach a maximum time
of access of 1s (room for improvement)
HDF5 is used by (among others) NASA (climate and geographic data) DOE (Advanced Simulation and Computing
Program) Boeing
Open libraries available for reading/creating HDF5 files
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3D - Viewer Our ProEngineer Technical Drawings of
NPP can be exported into .3ds file format (format by Autodesk)
3ds file format can be read by open libraries, and is tuned to be displayed with OpenGL
OpenGL visualization
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3D Viewer Putting together
Fast data access HDF5 Our technical 3D drawings 3ds- OpenGL Libraries
3D Visualization of Relap5-3D results
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Conclusions Fast data access - HDF5
Fast access to large data files Common standard, supported by
commercial plotting – packages Possibility to define controls on data set
generation
3D Viewer Fast 3D Visualization using existing
drawings Use of open libraries, independent from OS
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