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. |