Shielding Doors

This paper describes general types of shielding doors and the drive systems for opening and closing them. It compares estimated costs of the different types of doors based on factors they have in common. It describes a number of shielding doors designed and built at Lawrence Radiation Laboratory. These include a vertically rising door actuated by a hydraulic cylinder in a pit beneath it, a rotating slotted-barrel door, a swinging door, and a number of more or less typical sliding doors. Some of the problems involved in the design and use of these doors are discussed. Actual costs for a number of doors are given.