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.



Technological Aspects and Challenges for High-Power Proton Accelerator-Driven System Application

Nuclear Energy Agency

It is a generally accepted fact that construction of a high-power proton accelerator (HPPA) capable of driving a system of nuclear subcritical assembly for nuclear transmutation or energy amplification is feasible theoretically and conceptually. However, there are a number of technological challenges in several areas that need to be solved so ADS can become feasible. In this paper, we discuss the key requirements of ADS, available technologies and extension and/or extrapolation of today’s technology to render the ADS practical. ADS technology would necessarily be an extension of the accelerator of the Spallation Neutron Source (SNS), which is under construction at Oak Ridge National Laboratory. A discussion on how to extend SNS technology to ADS technology is also provided. As both accelerator and target/reactor would operate in uncharted regions of performances, extending and integrating today’s technology to the ADS realm would require many performance/requirements trade-offs between accelerator and reactor designers. The uncharted regime of performance includes two to three orders of magnitude higher beam power, improving the reliability of the accelerator to that of a similar range of reactor, and improving and controlling accelerator beam loss fraction to the 10–6 range in order to facilitate hands-on maintenance of the accelerator system. An opinion on a possible road map to achieve the ADS goals is also provided.


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