Development of underwater laser cutting technique for steel and zircaloy for nuclear applications
In nuclear field, underwater cutting and welding technique is required for post-irradiation examination, maintenance, decommissioning and to reduce storage space of irradiated materials like used zircaloy pressure tubes etc., of nuclear power plants. We have developed underwater cutting technique for 4.2 mm thick zircaloy pressure tubes and up to 6 mm thick steel using fibre-coupled 250 W average power pulsed Nd:YAG laser. This underwater cutting technique will be highly useful in various nuclear applications as well as in dismantling/repair of ship and pipe lines in water.
http://connection.ebscohost.com/c/articl...
3D Laser Scanning underwater (Archaeology)
The "GIS of Underwater Baiae" with 3D documentation: a useful tool to record the state of conservation of a Roman submerged town
Recently a new type of relief was carried out to document a room paved with opus sectile situated in the Underwater Park of Baiae, not far from the Nymphaeum of Punta Epitaffio (-5 m), using Naumacos L1 scanner laser. Naumacos L1 system has been created specifically for the archeological research and for the stratigraphic survey during the underwater excavation. The L1system generates a cloud of dots to create a photographic textured model, that is accurate within a millimeter. L1 system can scan bigareas and automatically merge them into a mosaic, getting to an improved sub-millimetric level of precision, which means that it's possible to obtain an archeological survey of smaller details.This method of 3D documentation shows better the state of conservation of the monuments, and increase the value of scientific dissemination.
http://www.academia.edu/1514314/The_GIS_...