  The Cherenkov Telescope Array (CTA) will perform a survey of the whole
Galactic disk with unprecedented sensitivity at energies up to 300 TeV. One of
the key science projects of the CTA consortium is the discovery of Galactic
PeVatrons (cosmic ray accelerators to PeV energies). The determination of
efficient criteria to identify PeVatron candidates during the Galactic plane
survey observations is essential in order to trigger deeper observations. This
contribution presents a method which relies on the broadband spectrum of the
source to investigate high energy spectral features. The application of this
method to specific sources will also be presented.
