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Winter School 2020
11
Seismic Hazard Assessment of NPP for the UK Territory
Seismic Hazard Assessment of NPP for the UK Territory
Mathieu AUGUSTIN
NGN CDT – Cohort 3
Supervised by Dr. P. Mandal
and Dr. D. Lombardi
Winter School 202o
Importance of adequate Seismic Hazard Assessment
Seismic Hazard Assessment is not flawless
UK
nuclear renewal
Variety of earthquake processes still unknown
OBJECTIVES
Evaluate
alternative methods for
hazard assessment
Assess
seismic
hazard
for UK
Assess
load for
nuclear
plant
Refine
hazard for
nuclear site
D S H A
P S H A
Room for growth
Lack of earthquake records in UK
Methods for Seismic Hazard
Analysis
Need of strong motion data for SHA for NPP
Accelerograms available for structural analysis
Alternative Methods for
Ground Motion Modeling
Irikura Recipe
Stochastic Method
Finite Difference/ Element
Hybrid Empirical/ Synthetic
Green Functions
Ray Theory
Spectrum Matching
Simulations
Modal Summation (NDSHA)
Regional seismic
hazard
analysis
Neo Deterministic Seismic Hazard Assessment
Crustal attenuation factors Qp & Qs
Velocity profiles Vp & Vs
Soil density rho
Neo Deterministic Seismic Hazard Assessment
Hazard map for the UK
extended source
point source
PSHA hazard map
(courtesy from British Geological Survey)
Site
Seismic Hazard Analysis
Parametric analysis to refine the hazard scenario
Earthquake Scenario
Soil profile modelling
Seismic Structural Analysis
NDSHA synthetic accelerograms
plant structural model
Courtesy of Huang et al. (2006)
plant
shutdown
criteria ?
Campbell & Bozorghnia (2001), Prediction equations for the standardized version of cumulative absolute velocity as adapted for use in the shutdown of U.S. nuclear power plants
Courtesy of Campbell & Bozorghnia (2011)
Huang et al (2006), Seismic demands on secondary systems in conventional and isolated nuclear power plants, 8th US National Conference on Earthquake Engineering, California