5MEV ELECTRON-BEAM FACILITIES IN JAPAN

There are 3 facilities with 5MeV electron beam processing machines in Japan and another one is planned to start operation in 1998. 2 of them are installed by Nissin-High Voltage and the other are by Sumitomo He avy/Radiation Dynamics. In this report are introduced 2 facilities whi ch we have installed and are operating satisfactorily. The first one w as: installed at Radia Industry for irradiation services and, the seco nd one for in-house use in a factory of a pharmaceutical plastic conta iner manufacturer, Shinko Chemical. And the second one is available fo r contract irradiation. The machine in Radia Industry has a comprehens ive conveyor system with a turn-over equipment to shoot from the top a nd the: bottom of materials with e-beam and X-ray, and has been succes sfully operated for many years. The machine in Shinko Chemical is equi pped with a unique conveyor system with, two conveyor lines under the beam window and the motion of the lines are opposite each. other This conveyor system also has a turn-over equipment like other machines but the: direction of turning-over is designed to give the irradiated mat erials more uni form dose.