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Measurements and computation of the reactivity effects of accident-caused core distortions in liquid-metal fast breeder reactors

Journal Article · · Nucl. Sci. Eng.; (United States)
OSTI ID:6314826
The reactivity effects of material rearrangements, simulating conditions in a postulated liquid-metal fast breeder reactor accident, were measured in SNEAK-12A, a single-zone uranium fueled critical assembly, and calculated using current Kernforschungszentrum Karlsruhe methods and data and, in part, also using the corresponding modules of the SIMMER-II accident analysis system. For all cases investigated, satisfactory agreement between theory and experiment was reached when two-dimensional transport eigenvalue calculations were used. The application of first-order perturbation theory or diffusion theory in a number of cases led to larger discrepancies, particularly when the experiments involved fuel compaction.
Research Organization:
Inst. for Neutron Physics and Reactor Tech., Karlsruhe
OSTI ID:
6314826
Journal Information:
Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 87:3; ISSN NSENA
Country of Publication:
United States
Language:
English