  In Failed Radiatively Accelerated Dusty Outflow (FRADO) model which provides
the source of material above the accretion disk (AD) as an option to explain
the formation mechanism of Broad Line Region (BLR) in AGNs, the BLR inner
radius ($\rm{BLR}_{in}$ hereafter) is set by the condition that the dust
evaporates immediately upon departure from the AD surface. On the other hand,
the location of BLR clouds obtained observationaly via reverberation mapping
shows some scaling with the source luminosity, so-called RL relation. We assume
$\rm{BLR}_{in}$ to be the location of BLR clouds, then using a realistic
expression for the radiation pressure of an AD, and having included the proper
values of dust opacity, and shielding effect as well, we report our numerical
results on calculation of $\rm{BLR}_{in}$ based on FRADO model. We investigate
how it scales with monochromatic luminosity at 5100 angstrom for a grid of
blackhole masses and Eddington ratios to compare along with the FRADO
analytically predicted RL directly to observational data.
