Example of probabilistic analysis difference with defense-in-depth: ECCS could be simplified

[Our] core damage frequency predictions show that, based on new, lower pipe-rupture probabilities, the design of the emergency core cooling system equipment can be simplified without reducing plant safety...

[Source: Stanley E. Ritterbusch (ABB-Combustion Engineering) et al., "Risk Informed Assessment of Regulatory and Design Requirements for Future Nuclear Power Plants" NERI Project Number 99-058, NERI Ñ 2002 Annual Report, p. 27]