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.



Results of the Second Phase of Calculations Relevant to the WPPT Benchmark on Beam Interruptions

Nuclear Energy Agency

Temperature transients induced by beam interruptions of different durations in MOX-fuelled and lead-bismuth cooled experimental ADS are investigated as a WPPT benchmark computational problem. The final report of the second phase of calculations will be published shortly by the NEA. This second phase of calculations aimed to investigate the impact of different fuel power density conditions on the transient results and uncertainties. Temperature variations are investigated assuming fresh fuel conditions, four different fuel power densities and two interruption durations. The main results obtained by the nine participants are presented and compared in this paper. Moreover, their uncertainty component due to the assumptions on models and data recommended in the benchmark specifications is evaluated by means of sensitivity studies carried out by some participants as a further contribution.


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