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TRANSCRIPT
Proceedingsof the
International Topical Meetingon
PROBABILISTIC SAFETY ASSESSMENTPSA '99
RISK-INFORMED, AND PERFORMANCE-BASEDREGULATION IN THE NEW MILLENNIUM
VOLUME 1
August 22-26, 1999Washington, DC
Sponsored by• ANS Washington, D.C. Section• ANS Nuclear Installations Safety Division
Cosponsored by• U. S. Nuclear Regulatory Commission• National Aeronautics and Space Administration• Korean Nuclear Regulatory Commission• Japan Atomic Energy Commission
In cooperation with• International Atomic Energy Agency
Published by theAmerican Nuclear Society, Inc.
La Grange Park, Illinois 60526 USA
UB/TIB Hannover 89120 909 91X oo
Foreword xvii
Volume 1
FAILURE DATA COMPILATIONAND ANALYSIS
Monday, August 23, 199910:15 a.m.-Noon
Chairs: Marty Sattison (INEEL)J. L Roca (NBNR-Argentina)
Level 1 PSA for Japanese Light Water Reactors withDomestic Component Failure Rate Data / Masajiro Sug-awara, Hiromichi Takahashi, Mitsumasa Hirano (NUPEC-Japan) 3
Progress Toward a Component Failure Rate Data Bank forMagnetic Fusion Safety /LC. Cadwallader (LMIT/INEEL),T. Pinna (ENEA-Italy) 11
SOVIET DESIGNED REACTOR SAFETY
Monday, August 23, 199910:15 a.m.-Noon
Chair: M. Stamatelatos (SCIENTECH)
Insights from Level 1 PSA for Novovoronezh NPP (Unit 5)and PSA-Based Modifications / Artour Lioubarski, IrinaKouzmina, Boris Gordon (SECN & RSNRA-Russia),Vladimir Rozin (Novovoronezh NPP-Russia) 21
Organization and Management of the Plant Safety Evalua-tion of the VVER-440/230 Units at Novovoronezh /Vladimir Rozin (Novovoronezh NPP-Russia), William J.Puglia, Cyrus M.Afshar (Data Systems and Solutions), PhilipPizzica (ANL) 29
The Role of PRA in the Safety Assessment of VVER Nu-clear Power Plants in Ukraine / C. A. Kot, C. E. Dickerman,J. L Binder (ANL) 38
Application of European Utility Requirements (EUR) forthe Development of the PSA for the European PassivePlant / Alvio Bassanelli (ENEL-SGN-haly), Terry Schulz(Westinghouse) 45
PRINCIPLES AND THEORY OF PSA
Monday, August 23, 199910:15 a.m.-Noon
Chairs: L. Carlsson (SKISweden)M. Higuchi (JAPC-Japan)
A Guided Tour of Minimal Cutsets Handling By Meansof Binary Decision Diagrams / Y. Dutuit (IUT-A-France),A. Rauzy (LaBRl-Franee) 55
The Stand-By Failure Analysis in Bayesian Experiment /Hung-Ju Wang, Giun Fang (AEC-Taiwan), Chen-Fu Chien(Natl Tsing-Hua Univ-Taiwan) 63
Using Fuzzy Arithemetic in Containment Event Trees /Selva S. Rivera, Jorge H. Bardn (CEDIAC-Argentina) ... 70
EXTERNAL EVENT ANALYSIS
Monday, August 23,199910:15 a.m.-Noon
Chair: A. Afzali (PG&E)
Insights from the Seismic PSA of the BWR Model Plant atJAERI / Tetsukuni Oikawa, Masaaki Kondo, Yuichi Wata-nabe, Iwao Shiraishi, Jim Hirose, Ken Muramatsu (JAERI-Japan) 77
Internal Flooding Analyses Results of Slovak NPPS /Vladimir Sopira (RELKO-Slovak Republic) 85
LESSONS LEARNED FROM RECENTRISK-INFORMED APPLICATIONS-PANEL
Monday, August 23, 199910:15 a.m.-Noon
Chair: Gary M. Holahan (NRC)
Panel 93
SYSTEM RELIABILITY ASSESSMENT
Monday, August 23, 19991:30-2:45 p.m.
Chair: K. Fleming (ERIN Eng)
Black Start-Based Recovery of Offsite Power to SONGS /P. Moieni, D. Henneke, S. Shepherd, P. Save (SCE, San On-ofre), M. Mansell, D. Reny (SCIENTECH), J. Stetkar, S. Rao(Pickard, Lowe & Garrick) 97
Linked Fault Tree Methodology as Applied to ComEdPSA's / Milad Kalache (ComEd, Downers Grove) 105
Loss of Offsite Power Recovery Factors and Diesel Gener-ator Mission Times: A Suggested Approach / Kenneth Cana-van (GPU Nuclear, NJ) 108
Application of Piping Reliability Models and Service Datato Evaluate Large Service Water System Pipe Break Fre-quencies I Mark A. Melnicoff (ComEd, Downers Grove), Da-vid A. Bidwell, Karl N. Fleming (ERIN Eng, Carlsbad) ... 115
PSA APPLICATIONS IN MAINTENANCE
Monday, August 23, 19991:30-2:45 p.m.
Chair: H. Dezfuli (SCIENTECH)
Development of Maintenance Software for PRA Models /Tsu-Jen Lin, Hung-Ju Wang, Chao-Ming Peng (INER-Taiwan), Gwo-Ding Li (TPC-Taiwan) 125
On-Line Operation Support Modeling: Common Cause De-pendency / Zdenko Simic, Vladimir MikuliCic (FEEC-Croatia) 128
UNCERTAINTY ANALYSIS: PRINCIPLES
Monday, August 23, 19991:30-2:45 p.m.
Chair: V. Bier (Univ of Wisconsin)
The Distinction Between Aleatory and Epistemic Uncer-tainties is Important: An Example from the Inclusion ofAging Effects into PSA / George Apostolakis (MIT) 135
Severe Accident Phenomenological Uncertainty: Risk andAccident Management Impacts I Jon Birchley, Bernd Jacket(Scherrer Inst-Switzerland) 143
Modeling and Measuring the Effects of Imprecision in SevereAccident Management / Donghan Yu (KAERI-Korea) 151
FIRE SAFETY ANALYSIS IN PSA-I
Monday, August 23, 19991:30-2:45 p.m.
Chairs: S. Nowlen (SNL)F. Mowrer (Univ of Maryland)
Applying a Fire IPEEE: Hot Shorts and Appendix R Verifi-cation / Raymond H. V. Gallucci, Mark D. Flaherty, DavidF. Wilson (RG&E, Ginna), Eric J. Jorgenson (EQE Int) .. 161
Description of a Fire Hazard Screening Methodology / Fran-cisco Joglar-Billoch, Frederick W. Mowrer, MohammadModarres (Univ of Maryland) 169
Quad Cities Fire Risk Assessment / William E. Burchill(ComEd, Downers Grove), Kiang Zee (ERIN Eng) 175
Risk Insights Gained From Fire Incidents / Steven P. Nowlen(SNL), Mardy Kazarians (Kazarians & Assoc) 183
RISK-INFORMED PRIORITIZATION
Monday, August 23,19991:30-2:45 p.m.
Chairs: K. Bych (PG&E)L. Pong (Washington Pub Pwr Supply)
Test Interval Analysis for the Isolation Valves at OlkiluotoNuclear Power Plant / Mika Yli-Kauhaluoma, Risto Hi-manen (Teollisuuden Voima-Finland) 191
Insights into the Risk Characteristics Derived From the Ap-plication of a Computerized On-Line Configuration Man-a g e r / Lichung T. Pong (Washington Pub Pwr Supply) ... 1 9 5
Simplified Risk Model Version II (SRM-II) Structure andA p p l i c a t i o n / S t e v e n Eide, Thomas Wierman (INEEL) .... 2 0 2
RELIABILITY AND QUALITY ASSURANCE
Monday, August 23, 19993:15-5:00 p.m.
Chair: R. Niall Hunt (SCIENTECH, Kent)
A Quality Assurance Handbook for Probabilistic SafetyAssessment / Jan Holmberg (SwedPower-Sweden) 213
Assessment of PRA Quality / G. A. Krueger (PECO En-ergy, Wayne), E. T. Burns (ERIN Eng, Campbell), R. A. Hill(GE, San Jose) 217
Insights from the Development of a Reliability AssuranceProgramme (RAP) Guidebook for Advanced Light WaterReactors / B. O. Cho (IAEA-Austria), R. Niall M. Hunt (SCI-ENTECH, Kent) 225
PSA IN AERONAUTICS AND SPACE
Monday, August 23, 19993:15-5:00 p.m.
Chair: P. Rutledge (NASA)
A Probabilistic Approach of Incorporating Safety and Reli-ability in System Designs for a Manned Mission to Mars /Jan W. Railsback (NASA), George P. Simion (SAIC) 235
Space Shuttle Multiple-Phase Integrated Probabilistic RiskAssessment / Karon S. Woods (NASA) 241
Safety Factor of a Helicopter Exposed to Ground Fire withFailure Probability Estimation / Tadeusz Niezgoda (MUT-Poland), Jerzy Jaiwinski, Jdzef turek (Air Force last ofTech-Poland), Maciej Woropay (Tech and AgriculturalAcademy-Poland) 249
The Integration of Probabilistic Tools into the AeronauticsRisk Management Program at the NASA Glenn ResearchCenter / Jeffrey John Rusick, Shantaram S. Pai, Vincent R.Lalli (NASA), Michael H. Packard (SAIC) 254
Estimation of Risk Trends in Shuttle Failure Data / RichardP. Heydorn, Jan W. Railsback, Tim C. Adams (NASA) .... 2 6 2
UNCERTAINTY ANALYSIS
Monday, August 23, 19993:15-5:00 p.m.
Chair: J. Vaurio (Loviisa NPP-Finland)
Simple Measure of Uncertainty Importance Using EntireChange of Cumulative Distribution Functions / Moon-HyunChun, Seok-Jung Han, Nam-Il Tak (KAIST-Korea) 271
Different Sources of Uncertainty in Level 2 PSA: Their Char-acterization and Propagation / Kwang-IlAhn, Dong-Ha Kim(KAERI-Korea) 279
Sensitivity Analysis for Embedded Computer-Based Sys-tems / Leila Meshkat, Joanne Bechta Dugan (Univ of Vir-ginia), John D. Andrews (Loughborough Univ-UnitedKingdom) 287
COMMON CAUSE FAILURE ANALYSIS
Monday, August 23, 19993:15-5:00 p.m.
Chair: A. Mosleh (Univ of Maryland)
Insights About Emergency Diesel Generator Failures fromthe USNRC's Common Cause Failure Database / Frances M.Marshall, Thomas E. Wierman (INEEL), Dale M. Rasmu-son (NRC, Rockville), AH Mosleh (Univ of Maryland) .... 297
Insights from the Application of INEL's Common CauseDatabase at Commonwealth Edison's Byron and Braid-wood / David A. Bidwell (ERIN Eng, Carlsbad), Young H.In (ComEd, Downers Grove) 305
Common-Cause Failure Analysis for Reactor Protection Sys-tem Reliability Studies / Thomas Wierman, Steven Eide,Cindy Gentillon (INEEL), Dale Rasmuson (NRC, Rock-ville) 310
Common Cause Failure Analysis of Hydraulic Scram andControl Rod Systems in the Swedish and Finnish BWRPlants / Tuomas Mankamo (Avaplan Oy-Finland) 318
Common Cause Failure Modeling in CANDU DesignProbabilistic Safety Assessment / Warren Vesik (AECL-Canada) 327
ON-LINE MAINTENANCE ISSUESAND INSIGHTS-PANEL
Monday, August 23, 19993:15-5:00 p.m.
Chairs: K. Kiper (NAESC)D. Brewer (Duke Energy)
Panel 335
MODELING CAUSE-EFFECT RELATIONSHIPSIN APPLICATIONS OF PRA-PANEL
Tuesday, August 24,19998:00-9:45 a.m.
Chair: G. Parry (NRC)
Panel 339
FIRE SAFETY ANALYSIS IN PSA-II
Tuesday, August 24, 19998:00-9:45 a.m.
Chair: Mardy Kazarians (Kazarians & Assoc)
Fire Risk Analysis for Loviisa 1 Turbine Hall / Matti Lehto(Fortum Eng-Finland), Jussi K. Vaurio (Fortum Power andHeat Oy-Finland) 343
Estimation of the Frequency of Fire Scenario by Means ofImproved Apportionment of the Frequency of Fires Asso-ciated with Engulfed Ignition Sources / Julian PanajotovArgirov (INRNE-Bulgaria) 350
Cable Hot Shorts and Circuit Analysis in Fire Risk Assess-ment / Jeffrey LaChance, Steven P. Nowlen, Frank Wyant(SNL) 356
SENSITIVITY AND UNCERTAINTY ANALYSIS
Tuesday, August 24, 19998:00-9:45 a.m.
Chair: P. Hessel (AECB-Canada)
Lessons Learned from an Uncertainty and Sensitivity Analy-sis of a Transient Simulation for a PSA / Eduard Hofer, Mar-tina Kloos (GRS-Germany) 363
Selection of the Appropriate Technique for Sensitivity/Uncertainty Analysis: A Decision Tree Approach / ClaudiaM. Rocco S., A. J. Miller (Robert Gordon Univ-United King-dom) 369
A Treatment of Uncertainties for Component Reliability orInitiator Frequency Estimates Based on Combining DataSources with the Potential of Non-Homogeneity / VladimirMorozov (Atomenergoproekt-Russia) 376
PSA PRINCIPLES AND INSIGHTS
Tuesday, August 24, 19998:00-9:45 a.m.
Chair: D. Bley (Buttonwood Consult)
Probabilistic Risk Assessment as a Forensic Science: TheEffect of Daubert and Kumho Tire on PRAs as Evidence /Vincent M. Brannigan, Carol Smidts (Univ of Maryland) .. 385
The Results of Probability Analysis of the First-Level Safetyfor the Bilibino NPP / A. V. Antonov, I. S. Volnikov, A. V.Dagaev, V. V. Dolgov, Yu. V. Ilyin, 1. M. Shvedenko (IPPE-Russia) 391
RISK-INFORMED REGULATION ANDREGULATORY PERSPECTIVE
Tuesday, August 24, 19998:00-9:45 a.m.
Chair: / . Murphy (NRC)M. Versteeg (KFD)
PSA Applications: Safety Goals and Acceptance Guide-lines / M. A. Cunningham, G. M. Holahan, T. L King, J. A.Murphy, G. W. Parry (NRC) 401
On the Role of Defense in Depth in Risk-Informed Regu-lation / J. N. Sorensen, G. E. Apostolakis, T. S. Kress, D. A.Powers (NRC) 408
VI]
Development of Risk-Based Performance Indicators /Patrick W. Baranowsky, Steven E. Mays, Thomas R. Wolf(NRC) 414
A Pilot Study on Risk-Informed In-Service Inspection / J.Mononen, A. Julin, J. Hinttala, I. Niemela, R. Rantala, O.Valkeajdrvi, R. Virolainen (STUK-Finland) 422
REVISITING THE ASSUMPTIONSCOMMON TO PSA's-PANEL
Tuesday, August 24, 199910:15 a.m.-Noon
Chairs: Dennis C. Bley (Buttonwood Consult)
Panel 431
DATA COLLECTION ANALYSIS
Tuesday, August 24, 199910:15 a.m.-Noon
Chair: G. Labadie (EdF-France)
New LOCA Frequencies in Barseback-1 PSA Update—AnApplication of a Piping Failure Database / Bengt Lydell (RSATechnol), Ingemar Ingemarson (Barsebdck Kraft—Sweden),Ralph Nyman (SKI-Sweden) 435
Innovative Use of EPRI Loss of Offsite Power Data for Dual-Unit Plant Frequency and Recovery / Xavier Polanski(ComEd, Downers Grove) 443
Engineering and Safety Assessment of Field Experience Re-lated to Pressurized Water Reactor Primary System Leaks /V. N. Shah, M. B. Sattison, A. G. Ware, C. L. Atwood, R. S.Hartley (INEEL), C. Hsu (NRC, Rockville) 450
Bayesian Modeling of Failure Rates and Initiating Event Fre-quencies / Eduard Hofer, Jorg Peschke (GRS-Germany) .. 458
COMBINING DSA AND PSA
Tuesday, August 24, 199910:15 a.m.-Noon
Chair: F. Rahn (EPRI)C. Tzanos (ANL)
Regulatory Treatment of Non-Safety Systems for PassivePlants: Application to the AP600 / Alan E. Levin, NicholasT. Saltos (NRC), Constantine P. Tzanos (ANL) 467
Regulatory Experience with Blending of Deterministic andProbabilistic Information in Risk-Informed Applications /Samuel S. Lee, Michael C. Cheok, Richard J. Barrett(NRC) 474
Dynamic Reliability Analysis with Monte Carlo Simulationand First Order Reliability Methods / Martin M. Woltereck(Technische Universitat-Germany) 481
Integrated Thermal Hydraulic Analysis and Probabilistic As-sessment for Safety Evaluation and Scenario Screening ofthe Westinghouse AP600 Reactor / Fei Li (Univ of Mary-land), Yue Guan (AST&M), MohammadModarres (Univ ofMaryland) 489
RELIABILITY ANALYSIS OFDIGITAL SYSTEMS
Tuesday, August 24, 199910:15 a.m.-Noon
Chairs: S. Guarro (Aerospace Corp)C. Smidts (Univ of Maryland)
Dependability Estimation of Digital System by OperationalProfile-Based Fault Injection / Jong Gyun Choi, Poong HyunSeong (KAIST-Korea) 499
Qualitative Analysis of Petri Nets / Gerald Point (IXI-LaBRl-France) 507
Development of Markov Model for Emergency Diesel Gen-erators Based on Causal Loop Diagram / Sun-Yeong Choi,Joon-Eon Yang (KAERl-Korea) 513
Evaluation of Systems Reliability by Means of Binary De-cision Diagram / Y. Dutuit (lUT-A-France), A. Rauzy(LaBRI-France), J.-P. Signoret (CSTJF-France) 521
RISK-INFORMED REGULATION:INDUSTRY EXPERIENCES
Tuesday, August 24,199910:15 a.m.-Noon
Chair: D. True (ERIN Eng)
A Risk-Informed Regulation Pilot Project—Exemption fromthe Hydrogen Control Requirements at SONGS / P. Moieni,T. G. Hook (SCE, San Onofre), B. Christie (PerformanceTechnol) 529
Pilot Programs for Risk-Informed, Performance-Based Reg-ulation / Bob Christie (Performance Technol) 537
LEVEL II AND CONSEQUENCE ANALYSIS
Tuesday, August 24, 19991:30-2:45 p.m.
Chair: Douglas Chambers SENES Consult-Canada)
Using Individual Plant Examination Data to Derive the In-dividual Risk of Early Fatalities: Preliminary Results, In-
sights, and Limitations of Approach / VinodMubayi, TrevorPratt (BNL), Mary Drouin (NRC, Rockville) 545
An Approach to Study the Effectiveness of Mitigation Ac-cident Management in a Probabilistic Frame / 0. Kawa-bata, N. Tanaka (NPEC-Japan) 551
The Characteristics and Construction of CANDU CET /Yong-Mann Song, Dong Ha Kim, Young Choi, Young Ho Jin,Kwang IlAhn (KAERI-Korea) 559
Accident Management Insights from the Level 2 PSA forthe Kernkraftwerk Leibstadt / Alfred Torri (RMA), MartinZeller (Kernkraftwerk Leibstadt-Switzerland), VladimirPokorny, Uwe Luettringhaus (RMA) 567
LESSONS FROM OPERATING EXPERIENCES
Tuesday, August 24, 19991:30-2:45 p.m.
Chair: P. Baranowsky (NRC)
Rates of Initiating Events at U.S. Nuclear Power Plants,1987-1995 / John P. Poloski, Corwin L Atwood, William J.Galyean (INEEL), Don G. Marksberry, Steven E. Mays(NRC) 577
Evaluation of Loss of Offsite Power Events at Nuclear PowerPlants: 1980-1996 / Frances M. Marshall, Corwin L At-wood, Dana L Kelly, David A. Prawdzik (INEEL), John W.Stetkar (Stetkar & Assoc) 585
Westinghouse Reactor Protection System Unavailability,1984-1995 / Steven Eide, Michael Calley, Cindy Gentillon,Thomas Wierman (INEEL), Dale Rasmuson, Don Marks-berry (NRC, Rockville) 593
General Electric Reactor Protection System Unavailability,1984-1995 / Steven Eide, Michael Calley, Cindy Gentillon,Thomas Wierman (INEEL), Hossein Hamzehee, Dale Ras-muson (NRC, Rockville) 601
Auxiliary/Emergency Feedwater System Reliability, 1987-1995 / William J. Galyean, John P. Poloski, Cynthia D. Gen-tillon, James K. Knudsen (INEEL), Dale M. Rasmuson,Donald G. Marksberry (NRC) 608
COMBINED DSA/PSA APPLICATIONS
Tuesday, August 24, 19991:30-2:45 p.m.
Chairs: K. O'Kula (Westinghouse)H. Nourbakhsh
Safety Analysis System Using Thermo-Hydrodynamic Sim-ulation of Accident Sequences in Event Tree/Go-Flow /Takeshi Matsuoka (Ship Rsch lnst-Japan), Toshio Ida (MHI-Japan), Hiroshi Nakamura (CSD-Japan) 619
RBMK-1500 Core Lifetime—Gas Gap Closure Probabilis-tic Assessment / M. Liaukonis, E. USpuras (Lithuanian En-ergy Inst-Lithuania), J. Augutis, V. Kopustinskas (VytautasMagnus Univ-Lithuania) 624
Incorporating Aging Effects into Probabilistic Risk Assess-ment/ Curtis L. Smith (INEEL), George Apostolakis, Tsu-MuKao (MIT), Vik Shah (INEEL) 631
SOFTWARE RELIABILITY
Tuesday, August 24, 19991:30-2:45 p.m.
Chair: C. Smidts (Univ of Maryland)
EISTRAM—Experimental Investigation of the Pie-Technique / Harald Thunem, Bj0rn Axel Gran (OECD-Norway) 641
A Challenge for Software Reliability Analysis: DescriptiveParameters in Concurrent Real-Time Software Systems /Atoosa Jalashgar (Tech Univ of Denmark—Denmark) 649
Fault Tree Qualitatively Improves Reliability of Safety-Related Software / Marko Cepin, Borut Mavko (Jozef Ste-fan Inst-Slovenia) 657
Function Point Analysis: An Application to a Nuclear Re-actor Protection System / Nihal Kececi, Ming Li, CarolSmidts (Univ of Maryland) 665
Software Reliability Test in Nuclear Power Plant Uljin Units3, 4 / Tscheh-Kyuhn Oh, Dae-Il Kim (KINS-Korea), Jung-Woo Park (WooriGisool-Korea) 672
RISK-INFORMED INSERVICE TESTING
Tuesday, August 24,19991:30-2:45 p.m.
Chairs: Y. Khalil (Northeast Util)T. Hook (SCE)
Evaluation of Surveillance Test Arrangement of BWR UsingTime-Dependent Model / Kohei Hisamochi (Hitachi-Japan),Hiroshi Suzuki (IHIS-Japan), Shingo Oda (Hitachi Eng-Japan) 683
Advanced On-Line and Shutdown Safety Monitor at SanOnofre Nuclear Generating Station / Dennis W. Henneke,Thomas G. Hook (SCE, San Clemente) 690
Risk-Informed 1ST PRA Results for San Onofre (SONGS),Including Fire, Seismic and Shutdown Quantitative PRA /Dennis W. Henneke, Gary Chung (SCE, San Clemente), Mau-reen Coveney (SAIC, San Diego) 695
Progressively Improving Technical Specifications with RiskInformation History—Current—Future / Mark Reinhart(NRC) 699
RISK-INFORMED DECISIONMAKING-PAPER/PANEL
Tuesday, August 24, 19993:15-5:00 p.m.
Chair: Vicki Bier (Univ of Wisconsin)
Paper:Chemical Safety Assessment: Use in Food Additives, Su-perfund, and Other Decisions / James D. Wilson (Resourcesfor the Future) 705
Panel 713
Volume 2
PRECURSOR ANALYSIS METHODSAND RESOLUTIONS
Tuesday, August 24, 19993:15-5:00 p.m.
Chair: P. Baranowsky (NRC)
Sophistication of SGTR Event Tree for Accident SequencePrecursor Analysis / Norio Watanabe, Masashi Hirano(JAERI-Japan), Hideo Takahashi (Business Tec-Japan) .. 1\1
Comparison of Some Precursor-Based Core-Melt FrequencyEstimators / J. Collet, P. Francois (EdF Clamart-Franee),B. Jourdain, B. Lapeyre (Ecole Nationale des Ponts etChaussees-France) 725
Results of the Precursor Analysis for German NuclearPower Plants / Helmut Hoertner, Siegfried Babst (GRS-Germany) 731
French Precursor Studies: Methods and Insights / VIFauchille (IPSN/DES/SEREP-France), J. M. Lanore(IPSN/DES/DIR-France), F. Pichereau (IPSN/DES/SERS-France), J. Tirira (IPSN/DES/SEREP-France) 738
DSA/PSA INTERFACES ANDUNCERTAINTY CONSIDERATIONS
Tuesday, August 24,19993:15-5:00 p.m.
Chair: F. Eltawila (NRC)
Enhanced Generalized Performance Assessment of Near-Optimized Pressurized Water Reactor Core Configurationsby Multi-Valued Possibilistic Processing / AnastasiosMironidis (NYPA), Leon Lidofsky (Columbia Univ), Left-eris Tsoukalas (Purdue Univ) 747