  Responses of surface and underground scintillation detectors of Yakutsk array
are calculated for showers initiated by primary particles with energy
E0>=1.0E17 eV within the frameworks of QGSJet01 QGSIIJet-II-04, SIBYLL-2.1 and
EPOS-LHC hadron interaction models. A new estimation of E0 is obtained with the
use of various methods. The resulting energy is lower compared to the obtained
with earlier method by factor ~1.33.
