Utilisation and Reliability of High Power Proton Accelerators
Workshop Proceedings, Daejeon, Republic of Korea, 16-19 May 2004
Accelerator-driven systems (ADS) are being considered for their potential use in the transmutation of radioactive waste. The performance of such hybrid nuclear systems depends to a large extent on the specification and reliability of high power accelerators, as well as the integration of the accelerator with spallation targets and sub-critical systems. At present, much R&D work is still required in order to demonstrate the desired capability of the system as a whole.
Accelerator scientists and reactor physicists from around the world gathered at an NEA workshop to discuss issues of common interest and to present the most recent achievements in their research. Discussions focused on accelerator reliability; target, window and coolant technology; sub-critical system design and ADS simulations; safety and control of ADS; and ADS experiments and test facilities. These proceedings contain the technical papers presented at the workshop as well as summaries of the working group discussions held. They will be of particular interest to scientists working on ADS development as well as on radioactive waste management issues in general.
Status of the Conceptual Design of an Accelerator and Beam Transport Line for Trade
Agence pour l'Energie Nucléaire
The TRADE (TRIGA accelerator-driven experiment) experiment, which is to be performed in the TRIGA reactor of the ENEA/Casaccia centre, involves the coupling of a 140 MeV, 0.3 mA beam that is produced by a cyclotron to a target hosted in the central thimble of the reactor scrammed to subcriticality. A 25-m long beam line was designed to transfer the beam by injecting it from the pool top, taking special care to have very low losses in the TRIGA reactor building where limited shielding of the beam line is possible. The beam transfer line is composed of a matching section (MS), which matches the beam to the following section, and a final bending section (FB), which shapes and directs the beam onto the target. Attention was paid to reduce the number and size of elements of the FB that were immersed in the pool water. Shielding calculations show that a sustainable radiation level is possible with the foreseen beam losses. The paper presents a description of the beam line at the present stage of the project.