Abstract
A new laser decontamination device has been developed to evaporate instantly with almost no
temperature rise and to clean up the radioisotope (RI) contaminated stainless steel components, devices
and major structural objects of nuclear power station, nuclear fuel reprocessing plants, accelerator
facilities and the related ones. The laser decontamination device delivers the tightly focused laser light
of GW/cm2 just on the surface to clean up RI contained rust mold on and inside the stress corrosion
cracks and corrosion pitting in the stainless steel-made components, devices and objects. The
decontamination device is newly designed to measure three-dimensional surface map very quickly, and
successfully to peel the three-dimensional irregular surface according to the measured map using the
three dimensional fast scanner, displacement meter and laser system. In the cold tests, the device
performed to peel off the surface of cans and multi-stepped plates very precisely, very uniformly and
very quickly.
