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Seismic Isolation Technology March 18-20,1992 International Atomic Energy Agency IWGFR / 87 International Working Group on Fast Reactors XA0055376 IAEA Specialists' Meeting on Seismic Isolation Technology March 18-20,1992 Proceedings GE Nuclear Energy 6835 Via Del Oro, %, 3 1/36 San Jose, California 95119 93-077-01 International Atomic Energy Agency IWGFR/87 International Working Group on Fast Reactors IAEA,Spe^^|Meeting on Seismic Is6itti^OTechnology MarchvlS-20,1992 Proceedings GE Nuclear Energy 6835 Via Del Oro, San Jose, California 95119 93-077-01 IAEA Specialists' Meeting on Seismic Isolation Technology San Jose, California, March 18-20, 1992 FORWORD The International Atomic Energy Agency held a Specialists' Meeting on Seismic Isolation Technology in San Jose, California, on March 18-20, 1992. Twenty-three experts from seven countries participated including V. Arkhipov, as the IAEA representative. The objective of the meeting was to provide a forum for review and discussion of seismic isolation technology applicable to thermal and fast reactors. The meeting was conducted consistent with the recommendations of the IAEA Working Group Meeting on Fast Breeder Reactor-Block Antiseismic Design and Verification in Bologna, October 1987, to augment a coordinated research program with specific recommendations and an assessment of technology in the area of seismic isolation. Seismic isolation has become an attractive means for mitigating the consequences of severe earthquakes. Although the general idea of seismic isolation has been considered since the turn of the century, real practical applications have evolved, at an accelerating pace, over the last fifteen years aided by several key developments: (1) recent advances in hardware developments in the form of reliable elastomer bearings, (2) development of reliable analytical methods for the prediction of dynamic responses of structures (3) construction of large bearing test machines and large shake tables to simulate earthquake effects on structures for validation analytical models and demonstration of performance characteristics, and (4) advances in seismological engineering. Although the applications and developments of seismic isolation technology have mainly benefitted commercial facilities and structures, including office buildings, research laboratories, hospitals, museums, bridges, ship loaders, etc., several seismically isolated nuclear facilities were implemented: the four 900 MWe pressurized water reactor units of the Cruas plant in France, the two Framatome units in Koeberg, South Africa, a nuclear waste storage facility in France and a nuclear fuel reprocessing plant in England. The scope of this specialists' meeting was to review the state-of-the-art technology related to the performance of seismic isolator elements and systems, performance limits and margins, criteria for the design, fabrication, testing of seismic isolation elements and systems, the capabilities of analytical codes and models and status of validation. The presentations provided by the participating countries indicated that seismic isolation technology has sufficiently advanced to make it an attractive feature in advanced nuclear power stations for mitigation of severe earthquakes. Indeed, advanced reactor concept evaluation and studies in Canada, Europe, Japan and the USA include horizontal seismic isolation and in some cases a combination of horizontal and vertical seismic isolation. The development of seismic isolation elements/bearings seems to be progressing towards standardized designs. The testing programs indicate high quality and consistency in the bearing manufacturing process. Significant progress has been achieved in providing reliable -n- bonding of elastomer layers and steel laminations that is stronger than the rubber itself. Another important aspect is the demonstrated long term durability of steel-laminated elastomer bearings under sustained loading conditions. The development of design codes and standards for seismic isolation is proceeding independently in the countries applying this technology consistent with the individual frameworks of regulations. In a future meeting it would be of interest to compare key elements of the design codes and standards in particular as they relate to safety aspects. In this document summaries of the individual meeting sessions and recommendations are provided. Also included are all the papers presented. The meeting was hosted by General Electric Company at the company offices in San Jose, California. In conjunction with the meeting, a visit of the Earthquake Engineering Research Center of the University of California at Berkeley was arranged. Emil L Gluekler Meeting Chairman -in- IAEA SPECIALISTS' MEETING ON SEISMIC ISOLATION TECHNOLOGY San Jose, California, March 18-20, 1992 Table of Contents Page 1. Forword i i 2. Meeting Agenda 4 3. List of Participants 9 4. Session Summaries and Recommendations Session 1: March 18, 1992 18 Seismic Isolation Technology Review Chairmen: J. W. Herczeg, US-DOE, USA J. K. Biswas, AECL, Canada Session 2 and 3: March 18-19, 1992 21 Seismic Isolation Element and System Performance Chairmen: A. Martelli, ENEA, Italy J. M. Kelly, UC Berkeley, USA Session 4: March 19, 1992 2 3 Design Criteria and Standards Chairmen: Ch. Coladant, EdF, France R. Seidensticker, ANL, USA Session 5: March 19, 1992 2 7 Seismic Isolation System Design and Analysis Chairmen: S. Aoyagi, CRIEPI, Japan M. Olivieri, ANSALDO, Italy 5. Meeting Summary and Recommendations 31 Meeting Chairman: E. Gluekler, GE, USA -1- PAPERS Page Session 1: Seismic Isolation Technology Overview 1. J. Betbeder - Matibet, EdF; P. Bisch, Sechaud et Metz; F. Gantenbein, 33 CEA; Tentative Provisions for Seismic Design of Base Isolated Buildings in France." 2. A. Martelli, ENEA; F. Bettinali, ENEL, "Status Report on Activities on 56 Seismic Isolation in Italy." 3. S. Aoyagi, CRIEPI; H. Shibata, University of Tokyo, "A Broad Review 75 of the Status of Seismic Isolation Study in Japan." 4. J. M. Kelly, University of California at Berkeley, "The Current Status 89 of Seismic Isolation Technology in the United States." 5. L Lin, CIAE, "Some Progress on Seismic Isolation Technology in 112 Building Structure in China." Sessions 2 and 3: Seismic Isolation Element and System Performance 6. K. Ishida, H. Shiojiri, T. Mazda, Y. Ohtori and S. Aoyagi, CRIEPI, 116 "Recent Results of Seismic Isolation Study in CRIEPI - Tests on Seismic Isolation Elements, Vibration Tests and Observations." 7. G. Bonacina, ISMES; F. Bettinali, ENEL; A. Martelli, ENEA; M. 143 Olivieri, ANSALDO; "Experiments on Seismic Isolation in Italy." 8. F. F. Tajirian, Bechtel; E. L Gluekler, GE; P. Chen, ETEC; J. M. Kelly, 163 UC Berkeley, "Qualification of Seismic Isolation Bearings for the ALMR." 9. R. W. Seidensticker, Y. W. Chang, and R. F. Kulak, ANL, "Summary of 177 Experimental Tests of Elastomeric Seismic Isolation Bearings for Use in Nuclear Power Plants." -2- PAPERS (Continued) Page Session 4: Design Criteria, Standards, Methods 10. H. Shibata, University of Tokyo, "Some Difference of Concepts 199 between Design Guideline for FBR Base Isolation System and Aseismic Design Guideline of LWR in Japan." 11. M. Olivieri, ANSALDO; A. Martelli, ENEA; F. Bettinali, ENEL; G. 209 Bonacina, ISMES; "Development of Guidelines for Seismic Isolation in Italy." 12. K. Ishida, H. Shiojiri, M. Moteki, CRIEPI; H. Shibata, T. Fujita, 221 University of Tokyo, "Recent Results of Seismic Isolation Study in CRIEPI - Design Method." 13. R. Kulak, ANL, "Technical Specifications for the Successful 230 Fabrication of Laminated Seismic Isolation Bearings." Session 5: Seismic Isolation Design and Analysis 14. J. K. Biswas, AECL, "Study of Seismic Responses of Candu 3 Reactor 241 Building Using Isolator Bearings." 15. S. Kitamura, M. Morishita, K. Iwata, PNC, "3D-Seismic Response of 261 a Base-Isolated Fast Reactor." 16. F. F. Tajirian, Bechtel, "Seismic Analysis for the ALMR." 278 17. F. Bettinali, ENEL; A. Martelli, ENEA; G. Bonacina, ISMES; M. 294 Olivieri, ANSALDO; "Numerical Activities on Seismic Isolation in Italy." 18. H. Shiojiri, K. Ishida, S. Yabana, K. Hirata, CRIEPI, "Recent Results 307 of Seismic Isolation Study in CRIEPI - Numerical Activities." 19. T. Sano, G. DiPasquale, ENEA-DISP; E. Vocaturo, ENEA; "Linear 325 Analysis for Base Isolated Structures." -3- IAEA Specialists' Meeting on Seismic Isolation Technology San Jose, California, March 18-20, 1992 Wednesday, March 18 Thursday, March 19 Friday, March 20 Session 1, Session 3, Visit of Earthquake Seismic Isolation Technology Seismic Isolation Elements Engineering Research Center, Overview and Systems (Completion) University of California - Berkeley (9:00 to 12:00) (9:00 to 10:00) (9:00 to 12:00) Session 4, Design Criteria & Standards (10:00 to 12:00) LUNCH LUNCH Session 2, Session 5, Seismic Isolation Elements Seismic Isolation Design and Systems and Analysis (13:00 to 16:30) (13:00 to 17:00) Summary 16:00 to 17:30 DOE/GE Hosted Dinner at Mirassou Winery, IAEA Reception (18:00) ELG93-006 IAEA SPECIALISTS' MEETING ON SEISMIC ISOLA TION TECHNOLOGY MEETING PROGRAM March 18.1992 Welcome, Introduction. Meeting Objectives IAEA. US-DOE, GE Session 1i March 18.1992 SEISMIC ISOLATION TECHNOLOGY OVERVIEW Session Chairmen J. W. Herczeg, US DOE J. K. Biswas. AECL Canada Summary of Main Features of Base Isolation in France Ch. Coladant EdF, France Status Report on Activities on Seismic A. Martelli. ENEA. Italy Isolation in Italy F. Bettinali. ENEL, Italy A Broad Review of the Status of Seismic Isolation S. Aoyagi, CRIEPI. Japan
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