- 13 - CHAPTER 1 SUMMARY OF THE TARGETED INSPECTIONS CARRIED OUT IN 2011 ON TOPICS RELATED TO THE FUKUSHIMA ACCIDENT···········································15 1.. INTRODUCTION..................................................................................................................................... 15 1.1 Organisation of the targeted inspections 15 1.2 Transparency and public information 15 2.. SUMMARY OF THE PRESSURISED WATER REACTOR (PWR) TARGETED INSPECTIONS CARRIED OUT IN 2011 ON TOPICS RELATED TO THE FUKUSHIMA ACCIDENT...................................16 Summary of the inspections........................................................................................................16 2.1 Protection of facilities against off-site flooding 18 2.1.1 Introduction..........................................................................................................................................18 2.1.2 Organisation.........................................................................................................................................18 2.1.3 Special operating rule in the event of flooding....................................................................................19 2.1.4 Monitoring of forecast criteria (meteorological, flood and tidal)........................................................19 2.1.5 Decision-making in an alert situation..................................................................................................20 2.1.6 Implementation of procedures.............................................................................................................20 2.1.7 Actions and modifications performed following the event at Le Blayais............................................20 2.1.8 Monitoring of volumetric protection (PV)...........................................................................................21 2.1.9 Maintenance of flood protection features............................................................................................21 2.1.10 Mobile pumping resources (MMP)....................................................................................................22 2.1.11 Powering the pumps after loss of off-site power supplies .................................................................22 2.1.12 Site isolation in the event of flooding................................................................................................23 2.1.13 Flooding of galleries between units and management.......................................................................23 2.1.14 Diversity of telecommunication resources.........................................................................................23 2.1.15 Optimisation of discharges at the prediction of a flooding risk.........................................................23 2.1.16 Exercises: deployment of flood protection and prevention equipment (cofferdams, sandbags, mobile pumping resources)................................................................................................................23 2.1.17 Overall evaluation of the "protection of facilities in an off-site flooding situation"..........................24 2.2 Earthquake protection of the facilities 24 2.2.1 Introduction..........................................................................................................................................24 2.2.2 Organisation.........................................................................................................................................25 2.2.3 Instrumentation....................................................................................................................................28 2.2.4 Event earthquake approach..................................................................................................................30 2.2.5 General evaluation on the topic "Protection of facilities in an earthquake situation"..........................31 2.3 Loss of heat sink 32 2.3.1 Introduction 32 2.3.2 Organisation / human factors 32 2.3.3 Conformity of pumping station systems with the EDF national frame of reference (deployment of particular directive DP 143) 33 2.3.4 Integration of experience feedback (REX) particularly interim requirement 303 concerning how to deal with clogging of the heat sink 33 2.3.5 Anticipation: monitoring, prevention and detection resources 34 2.3.6 Management of cooling in a degraded situation 34 2.3.7 Maintenance, servicing and availability of equipment, upkeep of premises 35 2.3.8 General evaluation of the "loss of heat sink" topic 36 2.4 Loss of electrical power supplies 36 2.4.1 Introduction 36 2.4.2 Organisation and operation 36 2.4.3 Backup electricity generating sets 37 2.4.4 Combustion turbines (TAC) 38 2.4.5 Backup turbine generator (LLS) 38 2.4.6 Electrical transformers 39 2.4.7 Fuel oil storage 39 2.4.8 Storage of oil and coolant fluid 39 2.4.9 Management of the loss of electrical power supplies 39 2.4.10 General evaluation of the "loss of electrical power supplies" topic 40
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