Investigation of beta+EC, EC/EC Processes in Se-74

Investigation of double beta decay processes (beta+EC, EC/EC) of Se-74 was performed at the Modane underground laboratory (LSM, France, 4800 m w.e.) using ultra low-background HPGe detector Obelix with sensitive volume of 600 cm(3) and a sample of natural selenium with a mass of 1.6 kg, containing similar to 0.89% (similar to 14.24 g) of Se-74. New experimental limits (at 90 % CL) on double beta decay transitions of Se-74 to the ground and exited states of Ge-74 were obtained from the preliminary calculation of experimental data accumulated in 135 days.