This paper presents the results of numerical modeling of acceleration of radiative transitions for a luminol molecule in the dipole approximation while it is located within cylindrical cutouts in a thin perforated aluminum film. The calculations were performed considering various dipole orientations and dipole position within the cavities. It is shown that the metasurface significantly increases the molecule's radiative decay rate, reaching values greater than 45 as the dipole approaches the metal surface. The distribution of radiation acceleration was determined depending on the height above the substrate and the radial position. Spectral analysis revealed a high overlap of the Purcell factor maximum with the luminol chemiluminescence spectrum, confirming the potential of the proposed structure for amplifying chemiluminescent signals in biosensors. Keywords: radiative transitions, chemiluminescence, plasmon resonance, luminol.