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In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
S. V. G. Menon, D. C. Sahni
Nuclear Science and Engineering | Volume 84 | Number 4 | August 1983 | Pages 380-383
Technical Note | doi.org/10.13182/NSE83-A15458
Articles are hosted by Taylor and Francis Online.
In this Note, we apply Koebke's equivalence theory to a uniform slab lattice of symmetric cells on which a macroscopic buckling is superimposed. It is shown that Koebke's procedure, up to second-order accuracy in buckling, leads to Benoist's (corrected) definition of diffusion coefficient, and the discontinuity factors are found to be independent of the position of the cell in the lattice. Some comments regarding the use of equivalence theory in typical reactor core calculations are also made.
