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There has been designed an experimental project «Neutrino-4» for 100 MW reactor SM-3 to test the hypothesis of the «reactor antineutrino anomaly» [1, 2]. Advantages of the reactor SM-3 for such an experiment are low background conditions as well as small dimensions of a reactor core -35x42x42 cm 3 . One has carried on the Monte-Carlo modeling of a position sensitive antineutrino detector consisting of 5 operation sections, which as a result of displacement, covers the distance from 6 to 13 meters from the reactor core. One has succeeded in obtaining an experimental area of sensitivity to oscillation parameters 2 m  and 2 sin 2 , which enables to verify the hypothesis of reactor antineutrino oscillations into a sterile state. *

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In connection with the question of possible existence of sterile neutrino the laboratory on the basis of SМ-3 reactor was created to search for oscillations of reactor antineutrino. A prototype of a neutrino detector with scintillator volume of 400 l can be moved at the distance of 6-11m from the reactor core. The measurements of background conditions have been made. It is shown that the main experimental problem is associated with cosmic radiation background. Test measurements of dependence of a reactor antineutrino flux on the distance from a reactor core have been made. The prospects of search for oscillations of reactor antineutrino at short distances are discussed.

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