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.



Optimisation of a Code to Improve Spallation Yield Predictions in an ADS Target System

Nuclear Energy Agency

In an accelerator-driven system (ADS), a target system is incorporated. The main purpose of the target system is to produce excess neutrons, which brings the subcritical reactor core in an ADS to critical condition. Critical condition allows for operation as a reactor system specifically to fulfil transmutation capability as well as electricity generation. From a safety point of view, the target system is quite a new component and potentially provides a novel radiotoxic burden to the environment and to humans. It is generally understood that there is still unknown physics involved in the operation of a target system, in particular, regarding nuclear spallation. Moreover, we have not yet developed the related engineering to cope with so-called “spallation products.” As a primary step towards better comprehension, this paper describes how we can have a better computational tool to predict the yields of spallation products in a proposed target system.


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