Methodologies for Seismic Safety Evaluation of Existing Nuclear Installations.

• Superior document: Safety Reports Series ; v.103
• Author: IAEA.
• Place / Publishing House: Havertown : : International Atomic Energy Agency,, 2020.; Ã2020.
• Year of Publication: 2020
• Edition: 1st ed.
• Language: English
• Series: Safety Reports Series
• Physical Description: 1 online resource (116 pages)

Table of Contents

Intro -- 1. INTRODUCTION -- 1.1. Background -- 1.2. Objective -- 1.3. Scope -- 1.4. Structure -- 2. FORMULATION OF THE PROGRAMME FOR SEISMIC SAFETY EVALUATION OF EXISTING Nuclear INSTALLATIONS -- 2.1. Perspective -- 2.1.1. Existing nuclear installations -- 2.1.2. Reasons to perform seismic safety evaluations -- 2.1.3. Margins beyond the design basis for new nuclear installations -- 2.1.4. Margins beyond the design basis for existing nuclear installations -- 2.2. Selection of methodology -- 2.2.1. Seismic probabilistic safety assessment -- 2.2.2. Methodology for seismic margin assessment -- 2.2.3. Design basis re-constitution -- 2.2.4. Selection considerations -- 3. DATA COLLECTION AND INVESTIGATIONs -- 3.1. General -- 3.2. Hazard classification of installations and structures, systems and components -- 3.3. Seismic design basis data -- 3.4. Data collection and documents -- 3.4.1. Site data -- 3.4.2. Assumptions and methods of analysis of existing structures, systems and components -- 3.4.3. Standards and procedures -- 3.4.4. Nuclear installation documentation -- 3.4.5. Data for structures, systems and components -- 3.4.6. Upgrades and nuclear installation modifications -- 3.4.7. Results of other safety evaluations -- 4. ASSESSMENT OF SEISMIC HAZARDS -- 4.1. Probabilistic seismic hazard analysis -- 4.2. Review level earthquake -- 4.2.1. General characteristics of the review level earthquake -- 4.3. Bases for development of the review level earthquake -- 4.3.1. Probabilistic seismic hazard analysis -- 4.3.2. Absence of probabilistic seismic hazard analysis -- 4.3.3. Regulatory specified -- 4.3.4. New nuclear power plants -- 5. SEISMIC SAFETY ASSESSMENT -- 5.1. Seismic margin assessment -- 5.1.1. General -- 5.1.2. Elements of the seismic margin assessment -- 5.1.3. Enhancements -- 5.1.4. Documentation -- 5.2. Seismic probabilistic safety analysis.

5.2.1. General -- 5.2.2. Elements of the seismic probabilistic safety assessment -- 5.2.3. Special issues -- 5.3. PSA based seismic safety assessment -- 5.3.1. System and accident sequence analysis -- 5.3.2. Fragility analysis -- 5.4. Off-site seismic induced effects -- 6. MODERATE AND LOW HAZARD INSTALLATIONS -- 6.1. Categorization -- 6.2. Selection of methodology -- 6.3. Review level earthquake -- 6.4. Selection of SSCs to be evaluated -- 6.5. SSC evaluation and walkdown -- 6.6. Seismic margin assessment -- 6.7. Seismic instrumentation -- 7. CONSIDERATIONS FOR UPGRADING -- 7.1. Structure and substructure upgrades -- 7.2. Mechanical and electrical distribution systems and mechanical components upgrades -- 7.2.1. Pressure retaining mechanical distribution systems and components -- 7.2.2. Other mechanical components -- 7.3. Electrical and instrumentation and control components -- 8. MANAGEMENT SYSTEM FOR SEISMIC SAFETY EVALUATION -- 8.1. General -- 8.2. Peer review -- 8.3. Configuration control -- 8.4. Quality assurance -- Appendix I EXAMPLES OF SEISMIC DESIGN CATEGORIES AND SITE FOUNDATION CLASSIFICATION -- Appendix II SUGGESTED DAMPING VALUES AND INELASTIC ENERGY ABSORPTION FACTORS -- Appendix III BACKGROUND AND TERMINOLOGY FOR THE INELASTIC ENERGY ABSORPTION FACTORS -- Appendix IV HYBRID METHOD FOR FRAGILITY CALCULATIONS -- Appendix V TYPICAL WALKDOWN FORMS -- REFERENCES -- DEFINITIONS -- ABBREVIATIONS -- CONTRIBUTORS TO DRAFTING AND REVIEW.