[en] The DOMPAC dosimetry experiment is an irradiated PWR pressure vessel simulation and has been performed in the pool of TRITON reactor (Fontenay-aux-Roses). It was designed for radiation damage characterization inside the vessel (neutron spectrum variation). A 20 cm thick ferritic steel block simulated the vessel and was equipped with Services des Piles de Saclay's graphite (G.A.M.I.N.) and tungsten damage monitors. Core/steel block distance was optimized through 1D (ANISN and SABINE) computations. A realistic incident neutron spectrum was obtained by similar damage/activation ratios computed for DOMPAC and FESSENHEIM 1 power plant. Experimental results were found in good agreement with expected fluence gradients inside the vessel