Provision of Support on Probabilistic Safety Assessment (PSA) for the Generic Design Assessment (GDA) of the UK AP1000

1 BACKGROUND TO THE PROJECT 1.1 In December of 2011 ONR formally completed Step 4 of the Generic Design Assessment (GDA) of Westinghouse Electric Company’s (WEC) UK AP1000 reactor design. WEC is the Requesting Party for the UK AP1000 GDA (referred to as “the RP” in this specification). 1.2 Step 4 of the GDA was an in‐depth ONR assessment of the safety case evidence for a generic site envelope undertaken in accordance with the regulatory regime of Great Britain. The general intention of Step 4 was to move fr...