  At the LHC era, the detector systems are operating at the harsh hadronic
environment with the unprecedentedly high particle flux. Position sensitive
silicon devices are usually positioned at the innermost regions of the
experimental setups and must cope with highly non-uniform radiation fields. At
the end of LHC Run II, fluence in silicon trackers reached 10$^{15}$
n$_{eq}$/cm$^2$. Initial simulation studies predict that the maximal fluence
for the HL-LHC may be up to two orders of magnitude higher than the one seen in
LHC Run I and Run II. In this paper, two general-purpose physics events
generators used for simulation of proton-proton collisions at LHC energies:
Pythia 8.2 and DPMJET 3, are compared. Fluences obtained using these models,
with the latest tuning to the LHC data, in detectors situated close to the
point of proton-proton collisions are determined as well.
