COSA II

European Commission Directorate-General For The Information Society And Media Directorate-General For Research And Innovation

Description

Further benchmark exercises to compare geomechanical computer codes for salt
Energy research
Nuclear energy and safety

Informations

• Publié par: EUROPEAN-COMMISSION-DIRECTORATE-GENERAL-FOR-THE-INFORMATION-SOCIETY-AND-MEDIA-DI
• Nombre de lectures: 8
• Langue: English
• Poids de l'ouvrage: 5 Mo

Extrait

Commission of the European Communities
COSA II
Further benchmark exercises to
compare geomechanical computer
codes for salt
Report
EUR 12135 EN s
Commission of the European Communities
m i
COSA II
Further benchmark exercises to
compare geomechanical computer
codes for salt
M. J. S. Lowe, N. C. Knowles
WS Atkins Engineering Sciences
Woodcote Grove. Ashley Road
Epsom. Surrey KT18 5BW
United Kingdom
Contract No Fl 1W 0054 UK
Final report
Work performed under the European Communities'
research programme
'Management and storage of radioactive waste'
Part A, Task 4: Geological disposal studies
PARL EURCP. Bibüoth.
Directorate-General Ν. C./EUR
Science. Research and Development
1989 CL EUR 12135 EN Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General
Telecommunications, Information Industries and Innovation
L-2920 Luxembourg
LEGAL NOTICE
Neither the Commission of the European Communities nor any person acting
on behalf of then is responsible for the use which might be made of
the following information
Cataloguing data can be found at the end of this publication
Luxembourg: Office for Official Publications of the European Communities, 1989
ISBN 92-825-9943-4 Catalogue number: CD-NA-12135-EN-C
© ECSC-EEC-EAEC, Brussels · Luxembourg, 1989
Printed in Belgium ACKNOWLEDGEMENTS
This work was carried out under contract to the CEC as part of its R&D
programme into the management and storage of radioactive waste (Part A,
Task 4 Geological Disposal Studies). It is a pleasure to acknowledge the
enthusiastic support and assistance of Mr Β Come from the CEC.
The authors are indebted to all participants for their unstinting
cooperation; for their generous help in making available information about
their computer codes and for the selfless manner in which they entered into
the benchmark and provided results of their work for comparison and
criticism. The participating organisations are listed in Appendix A.
Gesellschaft fur Strahlen und Umwelt Forschung (GSF), Ismes and the School of
Mines of the Technical University Madrid hosted plenary meetings, in
Braunschweig, Bergamo and Madrid respectively. Their hospitality is
gratefully acknowledged.
SUMMARY
Project COSA (Computer COdes Comparison for SAlt) was a benchmarking exercise
involving the numerical modelling of the geomechanical behaviour of heated
rock salt. Its main objective was to assess the current European capability
to predict the geomechanical behaviour of salt, in the context of the
disposal of heat-producing radioactive waste in salt formations. Twelve
organisations participated in the exercise in which their solutions to a
number of benchmark problems were compared.
The project was organised in two distinct phases: The first, from 1984-1986,
concentrated on the verification of the computer codes. The second, from
1986-1988 progressed to validation, using three in-situ experiments at the
Asse research facility in West Germany as a basis for comparison. This
document reports the activities of the second phase of the project and
presents the results, assessments and conclusions. TABLE OF CONTENTS
1. INTRODUCTION 1
2. OBJECTIVES OF COSA II 5
3. SUMMARY OF COSA PHASE I 13
4. ORGANISATION AND CHRONOLOGICAL DEVELOPMENT 19
5. PARTICIPANTS AND CODES 31
6. THE EXPERIMENTS * 4
7. MATERIAL PROPERTIES 6
8. ISOTHERMAL FREE CONVERGENCE BENCHMARK (IFC) 7
9. HEATED PRESSURE PROBE BENCHMARK (HPP) 125
10. HEATED FREE CONVERGENCE PROBE BENCHMARK (HFCP) 201
11. DISCUSSION 28
12. REVIEW OF OBJECTIVES AND ACCOMPLISHMENTS 297
13. CONCLUSIONS 303
14. REFERENCES
APPENDICES
A. CONTACT LIST FOR PARTICIPATING ORGANISATIONS 311
B. DOCUMENTS FOR THE BENCHMARK DEFINITIONS5
C. FINITE ELEMENT MESHES USED FOR THE BENCHMARKS 347
D. EMP CREEP STUDY 381
E. LIST OF COSA PUBLICATIONS 40
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