ML21278A143

2 to Updated Final Safety Analysis Report, Chapter 5, Appendix 5E, Reduction in Containment Prestress and Long-Term Corrective Actions for Vertical Tendon Corrosion

ML21278A143
Person / Time
Site:	Calvert Cliffs
Issue date:	09/07/2021
From:	Exelon Generation Co
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
NEI 99-04
Download: ML21278A143 (4)

Text

APPENDIX 5E REDUCTION IN CONTAINMENT PRESTRESS AND LONG-TERM CORRECTIVE ACTIONS FOR VERTICAL TENDON CORROSION TABLE OF CONTENTS PAGE

5E.0 REDUCTION IN CONTAINMENT PRESTRESS AND LONG-TERM 5E.1-1 CORRECTIVE ACTIONS FOR VERTICAL TENDON CORROSION 5E.1 REDUCTION IN CONTAINMENT PRESTRESS 5E.1-1 5E.1.1 DESIGN BASIS 5E.1-1 5E.1.2 DESIGN CRITERIA FOR PRESTRESS 5E.1-1 5E.1.3 DESIGN REANALYSIS 5E.1-1 5E.1.3.1 Summary of Calvert Cliffs Containment Reanalysis 5E.1-2 5E.

1.4 REFERENCES

5E.1-2 5E.2 LONG-TERM CORRECTIVE ACTIONS FOR VERTICAL TENDON 5E.2-1 CORROSION 5E.2.1 DISCOVERY OF CORROSION 5E.2-1 5E.2.2 CAUSE OF VERTICAL TENDON CORROSION 5E.2-1 5E.2.3 LONG-TERM CORRECTIVE ACTIONS 5E.2-1 5E.2.3.1 Future Wire Breakage Prediction Model (a.k.a. Weibull 5E.2-2 Model) 5E.2.3.2 Selection Criteria for Corroded Tendons to be 5E.2-3 Replaced 5E.2.3.3 Stressing Sequence of Tendons Replaced and 5E.2-4 Restressed 5E.2.3.4 Tendon Bearing Plate Concrete Void Repairs 5E.2-4 5E.2.4 ACCEPTABILITY OF CONCRETE CONTAINMENTS 5E.2-4 5E.2.5 ENHANCED VERTICAL TENDON INSPECTIONS 5E.2-5 5E.2.6 CONTAINMENT PRESSURE TEST 5E.2-5 5E.

2.7 REFERENCES

5E.2-6 5E.3 EVALUATION OF PLANT OPERATING LICENSE EXTENSION ON 5E.3-1 TENDON SYSTEM 5E.3.1 TENDON POPULATIONS 5E.3-1 5E.3.2 ORIGINAL TENDON PRESTRESS LOSSES 5E.3-1 5E.3.3 NEW TENDON PRESTRESS LOSSES 5E.3-2 5E.

3.4 REFERENCES

5E.3-3 5E.4 VERTICAL TENDON PRESTRESS LOSSES DUE TO FUTURE WIRE 5E.4-1 BREAKAGE 5E.5 CONCLUSION 5E.5-1

CALVERT CLIFFS UFSAR 5E-i Rev. 47 APPENDIX 5E REDUCTION IN CONTAINMENT PRESTRESS AND LONG-TERM CORRECTIVE ACTIONS FOR VERTICAL TENDON CORROSION LIST OF TABLES TITLE PAGE 5E-1 STRESS ANALYSIS RESULTS 5E.1-3 5E-2 PRESTRESS COMPARISON IN VERTICAL TENDON SYSTEM 5E.2-7 5E-3 UNIT 1 TENDON POPULATIONS AND EFFECTIVE LIVES 5E.3-4 5E-4 UNIT 2 TENDON POPULATIONS AND EFFECTIVE LIVES 5E.3-5

CALVERT CLIFFS UFSAR 5E-ii Rev. 47 APPENDIX 5E REDUCTION IN CONTAINMENT PRESTRESS AND LONG-TERM CORRECTIVE ACTIONS FOR VERTICAL TENDON CORROSION LIST OF FIGURES FIGURE 5E-1 RING GIRDER BEARING PLATE PLAN - BEARING PLATE REPAIRS AND TENDON STRESSING SEQUENCE - UNIT 1 5E-2 RING GIRDER BEARING PLATE PLAN - BEARING PLATE REPAIRS AND TENDON STRESSING SEQUENCE - UNIT 1

CALVERT CLIFFS UFSAR 5E-iii Rev. 47 APPENDIX 5E REDUCTION IN CONTAINMENT PRESTRESS AND LONG-TERM CORRECTIVE ACTIONS FOR VERTICAL TENDON CORROSION LIST OF ACRONYMS ASME American Society of Mechanical Engineers CCNPP Calvert Cliffs Nuclear Power Plant ISI Inservice Inspection NRC Nuclear Regulatory Commission PSC Precision Surveillance Corporation

CALVERT CLIFFS UFSAR 5E-iv Rev. 47