Out-vessel maintenance for the fusion ignition experiment IGNITEX

Summary form only given. Maintenance requirements and procedures for the regions exterior to the vacuum vessel of the proposed ignition experiment IGNITEX have been developed. The IGNITEX device is a single-turn-coil. ohmically heated tokamak. The single-turn coil almost completely covers the vacuum vessel and serves as a good radiation shield, limiting activation of structures surrounding the plasma and reducing radiation from the activated interior of the machine. This results in the possibility of hands-on maintenance in the test cell. Due to the presence of diagnostic penetrations in the magnet system, there will be some direct radiation streaming from the vessel. Lead plugs which can be moved into place during maintenance periods are considered to provide shielding against photon emission from the active interior of the machine. Procedures to minimize and handle the activation of exterior structures in the path of the direct streaming have been developed