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NEA Document
Proceedings of the Workshop on Uncertainties in the Assessment of Natural Hazards (Excluding Earthquakes) 19-21 April 2022
NEA/CSNI/R(2023)14

The Nuclear Energy Agency (NEA) Working Group on External Events (WGEV) was established by the Committee on the Safety of Nuclear Installations (CSNI) in June 2014 with the aim of improving the under...

External hazards WGEV Nuclear safety research Safety
Published date: 17 June 2025
NEA Document
Benchmark on External Events Hazard Frequency and Magnitude Statistical Modelling
NEA/CSNI/R(2021)10

At its 61st meeting, the CSNI approved the recommended task on the benchmark on external events hazard frequency and magnitude statistical modelling, to be pursued by the WGEV. Modelling of these ext...

Fukushima Nuclear safety External hazards Nuclear technology WGEV Nuclear safety research CSNI PRG CSNI Joint project Safety Benchmark …
Published date: 11 June 2024
Publications and Reports
CSNI Technical Opinion Paper - No. 18

Seismic probabilistic safety assessment (SPSA) is a systematic method for examining and evaluating the risk from earthquake-initiated accidents. The significant advances in the area of SPSA since the...

English WGRISK WGIAGE WGEV Safety Nuclear safety regulation Probabilistic risk assessment Technical Opinion Papers …
Published date: 27 September 2021
NEA Document
Riverine Flooding: Hazard Assessment and Protection of Nuclear Installations
NEA/CSNI/R(2018)14

Workshop Proceedings
21-23 March 2018, Paris, France

The WGEV “Riverine Flooding – Hazard Assessment and Protection of NPPs” task was designed to share regulatory practices and technical approaches fo...

English WGEV CSNI Proceedings
Published date: 7 September 2020
NEA Document
Examination of Approaches for Screening External Hazards for Nuclear Power Plants
NEA/CSNI/R(2018)7

It has long been recognised that external hazards can present a potential common cause source of initiating events that could challenge nuclear power plant safety. Modelling of these hazards is a com...

English WGEV Nuclear safety research CSNI
Published date: 2 April 2019
NEA Document
Understanding the Impact of External Hazards on Nuclear Facilities: Severe Weather and Storm Surge
NEA/CSNI/R(2017)13
The March 2011 accident at Fukushima Daiichi nuclear power plant triggered discussions about the natural external events that are low-frequency but high-consequence. In order to address these issues...
English WGEV Nuclear safety research CSNI Proceedings …
Published date: 16 April 2018