Low-Probability High-Consequence Risk Analysis Issues, Methods, and Case Studies ADVANCES IN RISK ANALYSIS This series is edited by the Society for Risk Analysis. Volume 1 THE ANALYSIS OF ACTUAL VERSUS PERCEIVED RISKS Edited by Vincent T. Covello, W. Gary F1amm, Joseph V. Rodricks, and Robert G. Tardiff Volume 2 LOW-PROBABILITY IHIGH-CONSEQUENCE RISK ANALYSIS Issues, Methods, and Case Studies Edited by Ray A. Waller and Vincent T. Covello A Continuation Order Plan is available for this series. A continuation order will bring delivery of each new volume immediately upon publication. Volumes are billed only upon actual shipment. For further information please contact the publisher. Low-Probability High-Consequence Risk Analysis Issues, Methods, and Case Studies Edited by Ray A. Waller Los Alamos National Laboratory Los Alamos, New Mexico and Vincent T. Covello u.s. Nationdl Science Foundation Washington, D.C. Contributing Editors Lee Abramson, u.s. Nuclear Regulatory Commission Maurice Bryson, Los Alamos National Laboratory George F1anagan, Oak Ridge National Laboratory v. R. R. Uppuluri, Oak Ridge National Laboratory Springer Science+Business Media, LLC Library of Congress Cataloging in Publication Data Main entry under title: Low-probability/high-consequence risk analysis. (Advances in risk analysis; v. 2) Includes bibliographical references and index. 1. Technology assessment—Addresses, essays, lectures. 2. Risk—Addresses,, essays, lectures. I. Waller, Ray A. I I . Covello, Vincent T. HI. Series. T174.5.L69 1984 363.3'4 84-1509 ISBN 978-1-4757-1820-1 ISBN 978-1-4757-1818-8 (eBook) DOI 10.1007/978-1-4757-1818-8 © 1984 Springer Science+Business Media New York Originally published by Plenum Press, New York in 1984 Softcover reprint of the hardcoverlst edition 1984 All rights reserved No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher PREFACE In recent years public attention has focused on an array of low-probability/high-consequence (LC/HC) events that pose a signif- icant threat to human health, safety, and the environment. At the same time, public and private sector responsibilities for the assessment and management of such events have grown because of a perceived need to anticipate, prevent, or reduce the risks. In attempting to meet these responsibilities, legislative, judicial, regulatory, and private sector institutions have had to deal with the extraordinarily complex problem of assessing and balancing LP/ HC risks against the costs and ben if its of risk reduction. The need to help society cope with LP/HC events such as nuclear power plant accidents, toxic spills, chemical plant explosions, and transportation accidents has given rise to the development of a new intellectual endeavor: LP/HC risk analysis. The scope and complexity of these analyses require a high degree of cooperative effort on the part of specialists from many f~elds. Analyzing technical, social, and value issues requires the efforts of physicists, biologists, geneticists, statisticians, chemists, engineers, political scientists, sociologists, decision analysts, management scientists, economists, psychologists, ethicists, lawyers, and policy analysts. Included in this volume are papers by authors in each of these disciplines. The papers share in common a focus on one or more of the following questions that are generic to the analysis of LP/HC risks. • How good are the knowledge base and methods for estimating LP/HC risks and uncertainties? • How are estimates of LP/HC risks and uncertainties incorpo- rated into decisionmaking? • How do features of the institutional context affect decision- making bodies concerned with LP/HC events? • What factors influence individual perceptions of LP/HC risks? v PREFACE • How are perceptions of LP/HC risks incorporated into public ~l~ia? • How does society cope with LP/HC risks that are unacceptable to some segments of the population? • How are normative considerations such as equity and social justice balanced in decisionmaking about LP/HC risks? • What are the criteria for comparing and evaluating different LP/HC risk analysis methods and risk management policies? All contributions in this volume were presented at the Society for Risk Analysis International Workshop on "Low-Probability/High- Consequence Risk Analysis: Issues, Methods, and Case Studies," held from June 15-17, 1982, in Washington, DC. The Society for Risk Analysis, the U.S. Nuclear Regulatory Commission, the U.D. Depart- ment of Energy. and the U.S. Environmental Protections Agency were joint sponsors of the Workshop. R. Waller and V. Covello Editors CONTENTS SECTION I: Low-Consequence/High-Probability Risk Analysis MOdels. 1 Introduction. • 1 J.B. Fussell Precursors to Potential Severe Core Damage Accidents: 1969-1979 ••••••••• 5 J.W. Minarick and C.A. Kukielka MOdeling Rare Events: The Frequencies of Fires in Nuclear Power Plants • " ••••• 33 M. Kazarians and G. Apostolakis Flood Prediction with Casual Analysis 55 T.P. Ballestero, D.B. Simons, and R.M. Li Methodology for Flood Risk Analysis for Nuclear Power Plants •••••••••• 65 D.P. Wagner, M.L. Casada, and J.B. Fussell Dam Failures: Insights to Nuclear Power Risks 81 W.L. Baldewicz Trade-Off Between Expected Risk and the Potential for Large Accidents • • • • • • • • • • 91 F. Niehaus, G. de Leon, and M. Cullingford Models for the Use of Expert Opinions W7 A. Mosleh and G. Apostolakis SECTION 2: Uncertainties Associated with Low- Probability/High-Consequence Risk Analysis Results. • •••• 125 Introduction •• 125 R.E. Barlow viii CONTENTS Bayesian Estimates for the Rate of Three Mile Island Type Releases. • • • • • • • • • 127 P.G. Groer An Incentive Approach to Eliciting Probabilities. • • • • •• 137 R.D. Schacter Robust Risk Analysis: The Need for It in Nuclear Probabilistic Risk Evaluations ••••••• 153 W.E. Vesely A Kalman Filter Model for Determining Block and Trickle SNM Losses. • • • • • • • 161 R.E. Barlow, M.J. Durst, and N.G. Smiriga SECTION 3: Statistics in Low-Probability/High- Consequence Risk Analysis 181 Introduction-Part 1 • • 4t • • • • 181 N.D. Singpurwalla Introduction-Part 2 • 183 L. G. Abramson Predicting Low-Probability/High-Consequence Events. • • • • • 187 H.F. Ma~tz and M.C. Bryson Statistical Methods of Risk Assessment for Energy Technology • • • • • • • • • • 201 K.G. Vohra SECTION 4: Case Studies of Recent Risk Analyses 217 Introduction. • 217 N. Rasmussen and M.C. Bryson Lessons Learned from First-Generation Nuclear Plant Probabilistic Risk Assessments •• 221 B.J. Garrick Use of Risk Analysis Methods in LNG Inductry. 239 P.J. Pelto State-of-the-Art of Risk Assessment of Chemical Plants in Europe. • • • • • • • • • • • • 257 R.A. Cox and D.H. Slater Risk Assessment at the Nuclear Regulatory Commission. • • • • 285 D.K. Rathbun CONTENTS ix SECTION 5: Quantification of Human Error in LP/HC Risk Analysis. • ••• • 293 Introduction • •• 293 A.D. Swain Human Reliability Analysis: A Case Study • • • • • • • • • •• 297 B.J. Bell Quantification of Human Performance Through the Use of Nuclear Power Plant Experience. • • • • • • • • • • • 309 R.E. Hall Alternative Approaches to Human Reliability .Analysis . . . . . . . . . . . . . . . . . . . . . . . . 319 D. Meister SECTION 6: Legal Issues and Regulatory Decision-Making in Low-Probability/ High-Consequence Risk Analysis. • 335 Introduction • • • • • • • • 335 M. Baram and D. Okrent Catastrophic Loss Risks: An Economic and Legal Analysis, and a Model State Statute. • • • • • • • • • • 337 M.B. Meyer Compensation Issues Related to LP/HC Events: The Case of Toxic Chemicals.. • • •• • •••••• 361 S. Jasanoff Risk Analysis in the United States Law: Cost Versus Risk • • • • • • • • • • • . • • • • • • • • 373 P. Ricci and L. Molton High-Consequence Analysis, Evaluation, and Application of Select Criteria • •• • • • • • • • • • • • • • • 393 I. Gutmanis and J.A. Jaksch Management Systems for Low-Probabi1ity/High- Consequence Events • • • • • • • • • • • • • • • • • • • 425 R. Zimmerman The Statutory Basis of Risk Assessment • • • • • • • • • • • • 455 F.A. Morris and E. Duvernoy