Provision of information to underpin the UK nuclear design bais criterion for naturally occurring external hazards

ONR is seeking to engage one of the Technical Support Contractors (TSC) appointed on Lot 2 of its Technical Support Framework. The TSC is required to compare the UK design basis criterion for naturally occurring external hazards with other practices (both in terms of adopting a probabilistic approach rather than deterministic, and in terms of the value of the probabilistic criterion itself - 10-4 per year). For example for seismic hazard analysis, US guide RG1.208 advocates using a performance based approach and se...