  The LHCb (Large Hadron Collider beauty) experiment at CERN aims at achieving
a significantly higher luminosity than originally planned by means of two major
upgrades: the Upgrade I that took place during the Long Shutdown 2 (LS2) and
the Upgrade II foreseen for LS4. Such an increase in instantaneous and
integrated luminosity with respect to the design values requires to reassess
the radiation exposure of LHC magnets, cryogenics and electronic equipment
placed in the Insertion Region 8 (IR8) around LHCb. Monte Carlo simulations are
a powerful tool to understand and predict the interaction between particle
showers and accelerator elements, especially in case of future scenarios. For
this purpose, their validation through the comparison with available
measurements is a relevant step. A detailed IR8 model, including the LHCb
detector, has been implemented with the FLUKA code. The objective of this study
is to evaluate radiation levels due to proton-proton collisions and benchmark
the predicted dose values against Beam Loss Monitor (BLM) measurements
performed in 2018. Finally, we comment on the upcoming LHC run (Run 3),
featuring a first luminosity jump in LHCb.
