Nuclear Science and Engineering / Volume 77 / Number 4 / April 1981 / Pages 415-425
Technical Paper / dx.doi.org/10.13182/NSE81-A18954
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A perturbation formalism is developed for the first-order change in keff due to a small perturbation in the exterior shape of a reactive system. The analysis is developed for both diffusion and transport theory, and several numerical examples are given.