Utilisation and Reliability of High Power Proton Accelerators

Workshop Proceedings, Daejeon, Republic of Korea, 16-19 May 2004

image of Utilisation and Reliability of High Power Proton Accelerators

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.



CFD Analysis of the Heavy Liquid Metal Flow Field in the MYRRHA Pool

Nuclear Energy Agency

SCK•CEN, the Belgian Nuclear Research Centre, is designing an accelerator-driven system (ADS), MYRRHA, which aims to serve as a basis for the European experimental ADS and to provide protons and neutrons for various R&D applications. It consists of a proton accelerator that delivers a 350 MeV, 5 mA proton beam to a liquid lead-bismuth eutectic (LBE) spallation target, which in turn couples to an LBE-cooled, subcritical fast-spectrum core in a pool-type configuration. The liquid metal flow pattern in the lower part of the MYRRHA pool vessel needs to be investigated in order to assess the details of recirculation and stagnant zones for adequate coolant flow and sufficient physico-chemical mixing as well as to judge the scaling of flow down to a model that can be handled experimentally. To this end, three-dimensional (3-D) computational fluid dynamics calculations were performed by NRG in collaboration with the MYRRHA team.


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