The physics performance of Shippingport Core 2 operations from initial start-up of the first seed through initial power operations on the second seed is summarized. The emphasis is on comparison of observed results with calculated results to identify the ability of current calculational techniques to describe core operations. Also included are selected comparisons of results of isotopic examination programs performed on Core 1 seed and blanket fuel assemblies. The comparisons indicate that critical core configurations are described with varying degrees of success with reactivity deviations generally <1% δ p. Power distributions agree reasonably well with measured values. Results of destructive analysis programs indicate that both gross and local fuel depletion are calculated to within 5 to 10%.