Towards a PSA harmonization. French-Belgian comparison of the level 1 PSA for two similar PWR types
P. Dupuy, F. Corenwinder, J.M. Lanore, D. Gryffroy, P. de Gelder, M. Hulsmans,
PSAM6 conference, Puerto Rico, juin 2002,
In the framework of the cooperation between French and Belgian regulatory authorities, a PSA comparison exercise has been carried out for several years. This comparison deals with two PSA level 1 studies for internal events, performed for both power and shutdown states : the French PSA of the 900 MWe-series PWR, and the Belgian PSA of the Tihange 1 PWR, which both concern PWRs with a similar Framatome design.
The purpose of this paper is to describe the PSA comparison methodology and to present, in a qualitative way, an overview of the insights obtained up to now. It also shows that such an “a posteriori” benchmark exercise turns out to be a step towards PSA harmonization, and gives more confidence in the results of plant specific PSA when used for applications like precursor analysis or evaluations of importance to safety.