Patent Number: 
Section: claims

1. A method of editing graphical representations of fuel bundle groups, comprising:selecting, with a computer interface, one of a plurality of existing bundle groups within a loading map; andperforming a grouping operation on the selected bundle group, the grouping operation including,modifying, by the user with the computer interface, at least one fuel bundle within the selected bundle group, wherein the at least one fuel bundle is, at the start or finish of the modification step, a member of the selected bundle group, the modification being based on a user-selected symmetry and a user-selected fuel bundle characteristic. 2. The method of claim 1, wherein the modifying includes removing at least one fuel bundle from the selected bundle group. 3. The method of claim 1, wherein the modifying includes adding at least one fuel bundle to the selected bundle group. 4. The method of claim 1, wherein modifying includes deleting the selected bundle group. 5. The method of claim 1, wherein the selected bundle group is a fresh bundle group and modifying includes changing at least one type of fuel bundle allowed in the selected bundle group.