Study of Multi-Beam Accelerator Driven Thorium Reactor
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Study of Multi-Beam Accelerator Driven Thorium Reactor
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C-A/AP/#427 MAR. 2011
Study of Multi-Beam Accelerator Driven Thorium Reactor H. Ludewig, A. Aronson
Collider-Accelerator Department Brookhaven National Laboratory Upton, NY 11973 Notice: This document has been authorized by employees of Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The United States Government retains a nonexclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this document, or allow others to do so, for United States Government purposes.
Study of Multi-Beam Accelerator Driven Thorium Reactor H. Ludewig and A. Aronson March 21, 2011 A. Target/Blanket Assembly Description The primary advantages that accelerator driven systems have over critical reactors are: 1) Greater flexibility regarding the composition and placement of fissile, fertile, or fission product waste within the blanket surrounding the target, and 2) Potentially enhanced safety brought about by operating at a sufficiently low value of the multiplication factor to preclude reactivity induced events. The control of the power production can be achieved by vary the accelerator beam current. Furthermore, once the beam is shut off the system shuts down. The primary difference between the operation of an accelerator driven system and a critical system is the issue of beam interruptions of the accelerator. These beam interruptions impose thermomechanical loads on the fuel and mechanical components not found in critical systems. Studies have been performed to estimate an acceptable number of trips, and the value is significantly less stringent than had been previously estimated. The number of acceptable beam interruptions is a function of the length of the interruption and the mission of the system. Thus, for demonstration type systems and interruption durations of 1sec 5mins 2500/yr and 50/yr are deemed acceptable. However, for industrial scale power generation without energy storage type systems and interruption durations of t < 1sec., 1sec
