Recent Applications of RELAP5-3D at GRNSPG
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Recent Applications of RELAP5-3D at GRNSPG. N.Muellner 2011 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. Introduction.

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Recent Applications of RELAP5-3D at GRNSPG

N.Muellner

2011 RELAP5 International User’s Group Seminar And Meeting

Salt Lake City, UT, July 25-28, 2011


Contents
CONTENTS

  • Introduction

  • Fast Data Access (HDF5 file format)

  • 3DS Viewer

  • Conclusions

RELAP5 International User's Group Seminar and Meeting, Salt Lake City, UT, July 25-28, 2011


Introduction
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


The Atucha-2 NPP

2 LOOPS

1 MCP, 1 UT SG each

1 PRZ

2160 MWth

1958 + 203 (nom. mod. T), or

2001 + 160 (max mod T)

+

14 from MCP

451 separated FC



THE BEPU PROCESS

THE POSTULATED INITIATING EVENTS (PIE)

83 NPP

Scenarios


Introduction1
Introduction

RELAP5-3D – Calculation of

Temperatures, Pressures,

Mass flows etc

Multiple Timesteps inside

“Control-timestep”

Ovars:

Temperatures

Pressures

Massflows

Ivars:

Valve postions

Pumps on/off

PRZ Heaters

& Spray

DRIVER-PROGRAM

DYNETZ – calculation of

Signals from Control System


Introduction2
Introduction

  • Results 2007-2011, apart from FSAR Chapter 15 - data of several TB

  • 2011 Activities –

    • Qualification

    • Consolidate data bases

    • Visualization


Fast data access quality control
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


Fast data access quality control1
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


3d viewer
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


3d viewer1
3D Viewer

  • Putting together

    • Fast data access HDF5

    • Our technical 3D drawings

    • 3ds- OpenGL Libraries

  • 3D Visualization of Relap5-3D results


Conclusions
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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