ASN Guide N°. 22 - Design of Pressurised Water Reactors

This guide addresses aspects relative to the design of the installations, which shall be based on appropriate application of the principle of defence in depth and aspects relative to the demonstration of the nuclear safety of a design, which presupposes that a design has been chosen. In practice, due to the need to produce a design of demonstrable safety, the design analysis and the demonstration of nuclear safety analyses are carried out through an iterative process. In view of the nature of this document, the part concerning the demonstration of nuclear safety is particularly detailed, on the understanding that the appropriateness of a new design shall first be examined from the aspect of applying the principle of defence in depth.