Advanced COIL technologies for field applications

ABSTRACT Chemical oxygen-iodine laser (COIL) has a great potential for applications such as decommissioning and dismantlement (D&D) of nuclear reactor, rock destruction and removal and extraction of a natural resource (Methane hydrate) because of the unique characteristics such as power scalability, high optical beam quality and optical fiber beam. Five-kilowatt Chemical oxygen-iodine laser (COIL) test facility has been developed. The chemical efficiency of 27% has been demonstrated with a moderate beam quality for optical fiber coupling. Our research program contains conventional/ejector-COIL scheme, Jet-SOG/Mist-SOG optimization, fiber delivery and long-term operation. 1. INTRODUCTION Many applications of Chemical Oxygen Iodine Laser have been proposed for the last decade. The ‘ reverse engineering ’ subject to demolition use such as the dismantlem ent of nuclear facility was the main object of interest. Recently, COIL is going to use in the fields of ‘ engineering ’ such as the production of energy source. COIL development of Miki Pulley began to be succeeded from the research of Tokai University. However, under the pressure of necessity for adapting to new application, ori ginal technologies have been making progress such as new ejector-COIL scheme. This paper presents a summary of COIL de velopment at Miki Pulley.