-i- TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................................2 1.1 Application ..............................................................................................................2 1.2 Background ............................................................................................................2 1.3 Licensee’s Approach...............................................................................................3 1.4 Plant Modifications ..................................................................................................3 2.0 EVALUATION ....................................................................................................................7 2.1 Materials and Chemical Engineering ....................................................................... 7 2.1.1 Reactor Vessel Material Surveillance Program ....................................................... 7 2.1.2 Pressure-Temperature Limits and Upper-Shelf Energy ........................................... 9 2.1.3 Pressurized Thermal Shock .................................................................................. 11 2.1.4 Reactor Internal and Core Support Materials ........................................................ 13 2.1.5 Reactor Coolant Pressure Boundary Materials ..................................................... 15 2.1.6 Leak-Before-Break ................................................................................................ 21 2.1.7 Protective Coating System (Paints) – Organic Materials ....................................... 24 2.1.8 Flow-Accelerated Corrosion .................................................................................. 26 2.1.9 Steam Generator Tube Inservice Inspection ......................................................... 28 2.1.10 Steam Generator Blowdown System .................................................................... 29 2.1.11 Chemical Volume Control ..................................................................................... 30 2.2 Mechanical and Civil Engineering ......................................................................... 33 2.2.1 Pipe Rupture Locations and Associated Dynamic Effects ..................................... 33 2.2.2 Pressure-Retaining Components and Component Supports ................................. 38 2.2.3 Reactor Pressure Vessel Internals and Core Supports ......................................... 50 2.2.4 Safety-Related Valves and Pumps ........................................................................ 53 2.2.5 Seismic and Dynamic Qualification of Mechanical and Electrical Equipment ........ 56 2.3 Electrical Engineering ........................................................................................... 58 2.3.1 Environmental Qualification of Electrical Equipment ............................................. 58 2.3.2 Offsite Power System ........................................................................................... 60 2.3.3 Alternating Current Onsite Power System ............................................................. 62 2.3.4 Direct Current Onsite Power System .................................................................... 68 2.3.5 Station Blackout .................................................................................................... 70 2.3.6 Conclusion ............................................................................................................ 72 2.4 Instrumentation and Controls ................................................................................ 72 2.4.1 Reactor Protection, Safety Features Actuation, and Control Systems ................... 72 -ii- 2.5 Plant Systems ....................................................................................................... 75 2.5.1 Internal Hazards ................................................................................................... 75 2.5.1.1 Flooding ................................................................................................................ 75 2.5.1.2 Missile Protection .................................................................................................. 78 2.5.1.3 Pipe Failures ......................................................................................................... 82 2.5.1.4 Fire Protection ...................................................................................................... 85 2.5.2 Pressurizer Relief Tank ......................................................................................... 90 2.5.3 Fission Product Control ......................................................................................... 91 2.5.4 Component Cooling and Decay Heat Removal ..................................................... 92 2.5.5 Balance-of-Plant Systems ................................................................................... 102 2.5.6 Waste Management Systems ............................................................................. 109 2.5.7 Additional Considerations ................................................................................... 113 2.6 Containment Review Considerations .................................................................. 115 2.6.1 Primary Containment Functional Design ............................................................. 115 2.6.2 Subcompartment Analyses ................................................................................. 118 2.6.3 Mass and Energy Release .................................................................................. 120 2.6.4 Combustible Gas Control in Containment ........................................................... 127 2.6.5 Containment Heat Removal ................................................................................ 128 2.6.6 Pressure Analysis for ECCS Performance Capability.......................................... 130 2.6.7 High Energy Line Break Outside Containment .................................................... 131 2.7 Habitability, Filtration, and Ventilation ................................................................. 136 2.7.1 Control Room Habitability System....................................................................... 136 2.7.2 Engineered Safety Feature Atmosphere Cleanup ............................................... 137 2.7.3 Control Room Ventilation System ....................................................................... 138 2.7.4 Spent Fuel Pool Area Ventilation System ............................................................ 139 2.7.5 Auxiliary and Radwaste Area and Turbine Area Ventilation Systems .................. 139 2.7.6 Engineered Safety Feature Ventilation System ................................................... 141 2.8 Reactor Systems ................................................................................................ 144 2.8.1 Fuel System Design ............................................................................................ 144 2.8.2 Nuclear Design ................................................................................................... 148 2.8.3 Thermal and Hydraulic Design ............................................................................ 151 2.8.4 Emergency Systems ........................................................................................... 155 2.8.5 Accident and Transient Analyses ........................................................................ 164 2.8.6 Fuel Storage ....................................................................................................... 231 2.8.7 Additional Review Area – Methods Evaluation .................................................... 231 2.9 Source Terms and Radiological Consequences Analyses .................................. 242 2.9.1 Source Terms for Radwaste System Analyses ................................................... 242 2.9.2 Radiological Consequences Analyses Using Alternative Source Terms ............. 243 2.9.3 Radiological Consequences of Accidental Waste Gas Releases ........................ 245 -iii- 2.10 Health Physics .................................................................................................... 251 2.10.1 Occupational and Public Radiation Doses .......................................................... 251 2.10.2 Post Accident Sampling System ......................................................................... 256 2.11 Human Performance ........................................................................................... 258 2.11.1 Human Factors ................................................................................................... 258 2.12 Power Ascension and Testing Plan ..................................................................... 262 2.12.1 Approach to EPU Power Level and Test Plan ..................................................... 262 2.12.2 Balance-of-Plant (BOP) Systems Considerations ............................................... 279 2.13 Risk Evaluation ................................................................................................... 281 2.13.1 Risk Evaluation of Extended Power Uprate ......................................................... 281 3.0 RENEWED FACILITY OPERATING LICENSE AND TECHNICAL SPECIFICATION CHANGES ....................................................................................................................