Development of an extension of the CAMS system to severe accident management

CAMS was designed at the Halden Project to assist operators during the development of an abnormal transient, in order to avoid core melt and/or containment failure. Management of the accident after core geometry changes was not within the scope of the first prototype. This report describes the development of a CAMS extension to severe accidents, where the predictive simulation function is performed by the code MAAP4, instead of APROS. The study focused on both BWRs and PWRs, without any customisation to actual operating plants. Chapter 1 gives an introduction that includes purpose, scope, references to other documents and a summary of the content. Chapter 2 gives a description of the methodology that has been developed to integrate the MAAP code into the CAMS structure. Chapter 3 describes the validation and verification activities that have been accomplished and their results. Chapter 4 gives the final conclusions of the project. The theoretical developments of the Diagnosis and Fitting Modules for BWRs and PWR's are given in the appendixes (author) (ml)