Safety Evaluation Report
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NUREG-0847 Supplement 29 Safety Evaluation Report Related to the Operation of Watts Bar Nuclear Plant, Unit 2 Docket Number 50-391 Tennessee Valley Authority Office of Nuclear Reactor Regulation AVAILABILITY OF REFERENCE MATERIALS IN NRC PUBLICATIONS NRC Reference Material Non-NRC Reference Material As of November 1999, you may electronically access Documents available from public and special technical NUREG-series publications and other NRC records at libraries include all open literature items, such as books, NRC’s Library at www.nrc.gov/reading-rm.html. 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NUREG-0847 Supplement 29 Safety Evaluation Report Related to the Operation of Watts Bar Nuclear Plant, Unit 2 Docket Number 50-391 Tennessee Valley Authority Manuscript Completed: October 2015 Date Published: October 2015 Office of Nuclear Reactor Regulation ABSTRACT This report supplements the Staff’s evaluation of the application filed by the Tennessee Valley Authority (TVA), as applicant and owner, for a license to operate Watts Bar Nuclear Plant (WBN), Unit 2 (Docket No. 50-391). This supplemental evaluation documents the Staff’s findings with respect to the applicable elements of Title 10 of the Code of Federal Regulations (10 CFR) 50.57, which lists the findings the Nuclear Regulatory Commission (NRC) must make to issue an operating license. The application for a construction permit for WBN, Units 1 and 2 was submitted on May 14, 1971, and constructions permits CPPR-91 and CPPR-92 were issued January 23, 1973. Subsequently, on October 4, 1976, an application for operating licenses for WBN, Units 1 and 2 was submitted by TVA. In its safety evaluation report (SER) published June 1982 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML072060491) and Supplemental SERs (SSERs) 1 through 20, issued by the Office of Nuclear Reactor Regulation (NRR) of the NRC, the NRC staff documented its safety evaluation (SE) and determination that WBN, Unit 1, met all applicable regulations and regulatory guidance. Based on satisfactory findings from all applicable inspections, on February 7, 1996, the NRC issued a full-power operating license (OL) to WBN, Unit 1, authorizing operation up to 100-percent power. In SSER 21 published February 2009 (ADAMS Accession No. ML090570741), the NRC staff addressed TVA’s application for a license to operate WBN, Unit 2, and gave information on the status of the items remaining to be resolved that were outstanding at the time that TVA deferred construction of WBN, Unit 2, and were not evaluated and resolved as part of the licensing of WBN, Unit 1. SSERs 22 to 28 documented the NRC staff’s ongoing evaluation and closure of open items in support of TVA’s application for a license to operate WBN, Unit 2. This SSER documents the NRC staff’s completion of its review of open items in related to TVA’s application for an OL for WBN, Unit 2. In addition to closure of remaining open items, this SSER discusses a revision to the motor operated valve testing program, the fire protection program, the technical specifications, and final SER modifications made by the applicant. iii TABLE OF CONTENTS Page ABSTRACT iii TABLE OF CONTENTS v ABBREVIATIONS ix 1 INTRODUCTION AND DISCUSSION 1-1 1.1 Introduction 1-1 1.7 Summary of Outstanding Issues 1-2 1.9 License Conditions 1-27 1.9.1 Flooding License Condition 1-28 1.9.2 Cyber Security License Condition 1-28 1.9.3 Core Operating Limits License Condition 1-28 1.9.4 Electrical Design License Condition 1-29 1.9.5 Fire Protection License Condition 1-29 1.9.6 Core Reload License Condition 1-29 1.13 Implementation of Corrective Action Programs and Special Programs 1-29 1.13.1 Corrective Action Programs 1-30 1.13.2 Special Programs 1-31 1.14 Implementation of Applicable Bulletin and Generic Letter Requirements 1-31 1.17 Financial Assurance for Decommissioning 1-46 1.18 NRC Staff Conclusion 1-47 3 DESIGN CRITERIA – STRUCTURE, COMPONENTS, EQUIPMENT, AND SYSTEMS 3-1 3.8 Design of Seismic Category I Structures 3-1 3.8.3 Other Seismic Category I Structures 3-1 3.9 Mechanical Systems and Components 3-1 3.9.3 ASME Code Class 1, 2, and 3 Components, Component Structures, and Core Support Structures 3-1 6 ENGINEERED SAFETY FEATURES 6-1 6.1 Engineered Safety Feature Materials 6-1 6.1.3 Postaccident Emergency Cooling Water Chemistry 6-1 6.2 Containment Systems 6-1 6.2.1 Containment Functional Design 6-1 6.2.2 Containment Heat Removal Systems 6-14 6.2.3 Secondary Containment Functional Design 6-16 6.2.4 Containment Isolation Systems 6-17 6.2.5 Combustible Gas Control Systems 6-18 6.2.6 Containment Leakage Testing 6-18 6.3 Emergency Core Cooling System 6-18 6.3.1 System Design 6-18 6.3.3 Testing 6-20 6.4 Control Room Habitability 6-20 6.5 Engineered Safety Feature (ESF) Filter Systems 6-20 6.5.1 ESF Atmosphere Cleanup System 6-20 v 7 INSTRUMENTS AND CONTROLS 7-1 7.5 Safety-Related Display Instrumenation 7-1 7.5.2 Postaccident Monitoring System 7-1 7.7 Control Systems Not Required for Safety 7-3 7.7.1 System Description 7-3 8 ELECTRIC POWER SYSTEMS 8-1 8.3 Onsite Power Systems 8-1 8.3.1 Onsite AC Power System Compliance with GDC 17 8-1 9 AUXILIARY SYSTEMS 9-1 9.2 Water Systems 9-1 9.2.1 Essential Raw Cooling Water and Raw Cooling Water System 9-1 9.2.2 Component Cooling System (Reactor Auxiliaries Cooling Water System) 9-1 9.2.6 Condensate Storage Facilites 9-1 9.5 Other Auxiliary Systems 9-2 9.5.1 Fire Protection 9-2 10 STEAM AND POWER CONVERSION SYSTEM 10-1 10.4 Other Features 10-1 10.4.9 Auxiliary Feedwater System 10-1 11 RADIOACTIVE WASTE MANAGEMENT 11-1 11.7 NUREG-0737 Items 11-1 11.7.1 Wide-Range Noble Gas, Iodine, and Particulate Effluent Monitors (II.F.1.1, II.F.1.2.a, and II.F.1.2.b) 11-1 11.7.2 Primary Coolant Outside Containment (III.D.1.1) 11-2 12 RADIATION PROTECTION 12-1 12.7 NUREG-0737 Items 12-1 12.7.1 Plant Shielding (II.B.2) 12-1 12.7.2 High Range In-Containment Monitor (II.F.1.2.c) 12-1 12.7.3 In-Plant Radioiodine Monitor (III.D.3.3) 12-1