  The new concept of antineutrino source for future short-baseline experiments
is discussed. The source ensures: 1) well defined hard antineutrino flux; 2)
the rate of counts more than ~(1E+2 - 1E+3) per day in the detector volume
about cubic meter; 3) low level of count errors - < 1%. The proposed source is
based on (n,gamma)-activation of 7Li near the reactor active zone and transport
of the fast beta-decaying 8Li isotope toward a remote neutrino detector and
back in the closed loop. The proposed experiment allows to detect (electron
antineutrino, p)-interaction with high precision and directed to search of
sterile neutrinos with squared-mass difference between sterile and active
neutrinos ~1 eV2. The results of simulation for (3+1) and (3+2) sterile
neutrino models indicate the space regions for search of electron
antineutrino-disappearance outside the spectrum errors.
