- Date: 18-19 September 2017
- Location: Orleans, France
Based on recent theoretical progresses and outcomes of recent European projects (e.g. FP7 SYNER-G, FP7 MATRIX, FP7 ASAMPSA_E), the EU NARSIS project aims at proposing some elements of improvement to be integrated in the current Probabilistic Safety Assessment (PSA) procedures:
- A better characterisation of natural external hazards in a multi-hazard perspective (occurrence of concomitant external events, either simultaneous-yet-independent hazards or cascading events) .
- A better evaluation of the physical and operating fragility of NPPs’ SSC under single or multiple external aggressions, accounting for interdependencies and temporal effects (ageing, fatigue).
- A better risk integration combined with uncertainty characterisation and quantification, proposing approaches to allow efficient risks comparison and to account for all the possible risk interactions and cascade effects (both low-frequency / high consequences events and combined events).
The foreseen improvements and related supporting tools will be tested on a simplified virtual PWR as well as on a real one, to assess applicability for normal and severe accident management purposes.