Ferromagnetic materials have the interaction between mechanical and magnetic fields which is called magnetoelastic coupling. Also it is known that magnetic properties of ferromagnetic materials depend on plastic deformation. There are various kinds of Non-Destructive Testing (NDT) based on these phenomena for estimation of stress and plastic deformation. We propose a new analytical method of magnetic hysteresis curve, in which the saturation magnetic hyste resis curve is decomposed to neutral magnetization...
英字タイトル:
Estimation of Stress and Plastic Deformation of SS400 SteelUsing Magnetic Properties

Large amount of sea water intruded Reactor Buildings including controlled area of Fukushima-Daini Nuclear Power Plant (NPP) at the Tsunami disaster 11th May 2011 and the sea water was contaminated by some radioactive substances. Although the concentration of the radioactive substances was low enough to meet the criteria of technical specification for discharge to the sea、we decided to decontaminate it under the limit of the detection for more safe. Then the result of the discussion with local government and...
英字タイトル:
The Safety Handling Technic of the Sea Water that intruded Fukushima-Daini NPP at the Tsunami Disaster 2011