  The Large Hadron Collider is the world's largest and highest center-of-mass
energy particle accelerator. During the Phase I operation it is expected that
the LHC operated at a centre-of-mass energy of 13 TeV will deliver to the CMS
experiment total integrated luminosity of $\sim$300 fb$^{-1}$ till 2023. The
High Luminosity LHC upgrade is expected to run at a centre-of-mass energy of 14
TeV and will allow ATLAS and CMS to collect integrated luminosities of the
order of 300 fb$^{-1}$ per year, and up to 3000 fb$^{-1}$ during the HL-LHC
projected lifetime of ten years. The large expected integrated luminosity
enables the exploration of the multi-TeV scale by searches for particles with
high masses as well as by investigation of processes with very low cross
sections such as Flavor-Change Neutral Current interactions in top quark
sector. In this report we present a proposal for the top quark FCNC searches at
HL-LHC based on Monte-Carlo simulation of the upgraded CMS detector.
