ML22278A219

Rev. 21 to Updated Final Safety Analysis Report, Chapter 6, Appendix 6A, Subcompartment Differential Pressure Considerations

ML22278A219
Person / Time
Site:	Limerick
Issue date:	09/19/2022
From:	Constellation Energy Generation
To:	Office of Nuclear Reactor Regulation
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LGS UFSAR APPENDIX 6A 6A-i REV. 13, SEPTEMBER 2006 APPENDIX 6A -SUBCOMPARTMENT DIFFERENTIAL PRESSURE CONSIDERATIONS TABLE OF CONTENTS 6A.0 INTRODUCTION 6A.1 BIOLOGICAL SHIELD ANNULUS SUBCOMPARTMENT MODELING PROCEDURES AND ANALYSIS 6A.2 DRYWELL HEAD REGION SUBCOMPARTMENT ANALYSIS 6A.3 REFERENCES

LGS UFSAR APPENDIX 6A 6A-ii REV. 13, SEPTEMBER 2006 APPENDIX 6A -SUBCOMPARTMENT DIFFERENTIAL PRESSURE CONSIDERATIONS LIST OF TABLES Table Title 6A-1 Reactor Primary System Blowdown Flow Rates and Fluid Enthalpy -

Recirculation Line Break 6A-2 Recirculation Outlet Line Break Blowdown Mass Flux Time History 6A-3 Reactor Primary System Blowdown Flow Rates and Fluid Enthalpy -

Feedwater Line Break 6A-4 Feedwater Line Break Blowdown Mass Flux Time History 6A-5 Head Spray Line Break 6A-6 Compartment Volumes Used in Reactor Vessel Shield Annulus Subcompartment Analysis 6A-7 Flow Area and Coefficients Used in Reactor Vessel Shield Annulus Subcompartment Analysis

LGS UFSAR APPENDIX 6A 6A-iii REV. 13, SEPTEMBER 2006 APPENDIX 6A -SUBCOMPARTMENT DIFFERENTIAL PRESSURE CONSIDERATIONS LIST OF FIGURES Figure Title 6A-1 Reactor Shield Annulus Arrangement 6A-2 Reactor Shield Annulus Subcompartment Model Schematic 6A-3 Pressure Transient in Reactor Shield Annulus Following Recirculation Outlet Line Break at the Nozzle Safe-End 6A-4 Pressure Transient in Reactor Shield Annulus Following Feedwater Line Break at the Nozzle Safe-End 6A-5 Force Transient on Reactor Vessel Following Recirculation Outlet Line Break at the Nozzle 6A-6 Force Transient on Reactor Shield Wall Following Recirculation Outlet Line Break at the Nozzle 6A-7 Force Transient on Reactor Vessel Following Feedwater Line Break at the Nozzle 6A-8 Force Transient on Reactor Shield Wall Following Feedwater Line Break at the Nozzle 6A-9 Drywell Head Arrangement 6A-10 Head Spray Line Break Geometry 6A-11 Pressure Transient in Drywell Head Area for Head Spray Line Break