NUREG/CR-6850, Volume 1 - NRC

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2.3.5 Long Duration Fires .................................................................................................2-92.3.6 General Application of these Methods.....................................................................2-92.4 References for Chapter 2..............................................................................................2-103 CONCLUSIONS AND CLOSING REMARKS ........................................................................3-13.1 Status of Program Objectives..........................................................................................3-13.2 Improvement in the State-of-the-Art in Fire PRA.............................................................3-23.2.1 Post-fire Plant Safe Shutdown Response Model.....................................................3-33.2.2 Fire Compartment and Scenario Screening ............................................................3-33.2.3 General Treatment of Fire Event Data and Fire Frequency Analysis......................3-43.2.4 Fire Severity Treatment ...........................................................................................3-43.2.5 Detection and Suppression Analysis .......................................................................3-53.2.6 Circuit Analysis ........................................................................................................3-53.2.7 Human Reliability Analysis ......................................................................................3-63.3 Limitations to the State-of-the-Art and their Importance..................................................3-73.3.1 Number of Combined Fire-Induced Spurious Actuations ........................................3-73.3.2 Estimating Spurious Actuation Probabilities ............................................................3-73.3.3 Dynamic Versus Static Modeling of Fire Damage and Operator Response............3-93.3.4 Multiple Fires ...........................................................................................................3-93.3.5 Multiple Initiating Events from the Same Root Cause ...........................................3-103.3.6 Limitations in Internal Events Analysis that Carry Over to Fire .............................3-103.3.7 Smoke Damage.....................................................................................................3-103.3.8 Seismic/Fire Interactions .......................................................................................3-103.3.9 Administrative Aspects of the Fire Protection Program .........................................3-103.3.10 Effectiveness of Fire Protection Systems ............................................................3-103.3.11 Effectiveness of Passive Fire Barriers.................................................................3-113.4 Insights and Observations.............................................................................................3-123.5 Recommendations ........................................................................................................3-143.5.1 Low Power and Shutdown Operating Modes ........................................................3-143.5.2 Detailed Fire HRA..................................................................................................3-153.5.3 Automated Fire PRA Information Tracking Tools ..................................................3-153.5.4 Plant-Specific Assessment of Manual Firefighting ................................................3-153.5.5 Estimating Component Failure Mode Likelihoods .................................................3-153.6 References for Chapter 3..............................................................................................3-16viii
LIST OF FIGURESFigure 1 Overview of the Fire PRA Process ...............................................................................xivFigure 2-1 Overview of the Fire PRA Process ...........................................................................2-2ix
Page 1: EPRI 1011989NUREG/CR-6850Final Repo
Page 5: CITATIONSThis report was prepared b
Page 9: CONTENTS1 INTRODUCTION ............
Page 15 and 16: PREFACEThis report is presented in
Page 17: BDetailed Fire Scenario AnalysisTAS
Page 21: ACKNOWLEDGMENTSThis work benefited
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