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An Investigation of Power Stabilization and Space-Dependent Dynamics of a Nuclear Fluidized-Bed Reactor

Christopher C. Pain, Matthew D. Eaton, Jefferson L. M. A. Gomes, Cassiano R. E. de Oliveira, Adrian P. Umpleby, Kemal Ziver, Ron T. Ackroyd, Bryan Miles, Antony J. H. Goddard, H. van Dam, T. H. J. J. van der Hagen, D. Lathouwers

Nuclear Science and Engineering / Volume 144 / Number 3 / July 2003 / Pages 242-257

Technical Note /

Previous work into the space-dependent kinetics of the conceptual nuclear fluidized bed has highlighted the sensitivity of fission power to particle movements within the bed. The work presented in this paper investigates a method of stabilizing the fission power by making it less sensitive to fuel particle movement. Steady-state neutronic calculations are performed to obtain a suitable design that is stable to radial and axial fuel particle movements in the bed. Detailed spatial/temporal simulations performed using the finite element transient criticality (FETCH) code investigate the dynamics of the new reactor design. A dual requirement of the design is that it has a moderate power output of ~300 MW(thermal).

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