A method for generating fuel loading data for a core in a nuclear reactor, wherein the core includes an array of fuel locations in the core, the method includes: defining an even cycle bundle shift map of fuel bundles to be shifted to another core location during an even fuel loading cycle; defining an odd cycle shift map of fuel bundles to be shifted to another core location during an odd loading cycle, wherein the odd cycle and even cycle are alternative and successive core refueling cycles; defining a discharge map identifying the another locations to receive the bundles from the locations identified in the even and odd cycle shift maps, and generating shuffling instructions indicating which fuel bundles from a prior fuel cycle are to be shifted to one of the another locations of the core for a subsequent fuel cycle, wherein bundles to be shifted during the even fuel loading cycle are selected from the fuel bundles to be shifted identified in the even cycle bundle shift map and bundles to be shifted during the odd fuel loading cycle are selected from the fuel bundles to be shifted identified in the odd cycle bundle shift map.