The NUCIFER project aims to test a small electron-antineutrino detector to be installed a few 10 meters from a reactor core for monitoring its thermal power and for testing the sensitivity to the plutonium content, in order to apply this technology to non-proliferation. Moreover, recent re-analysis of previous reactor neutrino experiments shows a significant discrepancy between measured and expected neutrino count rates. Among the various hypotheses a new phenomenon as the existence of a fourth sterile neutrino can explain this anomaly and NUCIFER will be able to address this hypothesis. The detector is now almost finished and we will test it at the French OSIRIS research reactor for the next months.