welded jointsAutomated ultrasonic system residual stresses in the welded joints of the circulation pipe NPP 10/02/2016 2016 - #03 Nuclear power plants Minin S.I. Trofimov A.I. Trofimov M.A.Measurement of the stressed state of welded joints in the NPP process components and circulation pipelines based on acoustoelasticity theory 3/28/2016 2016 - #02 Nuclear materials Trofimov A.I. Minin S.I. Trofimov M.A.