Report volume calcs for cell instance rather than just total

[kkiesling]

In talking with @pshriwise about getting the volume for a specific cell instance, we determined it would be valuable to be able to get the volume of each cell instance directly rather than have to back it out from the total. Right now, if there is a volume calculation setup for a cell that is repeated throughout the model, the reported volume is the total volume for all cells. To get the volume of a single instance, one has to divide that total by the number of instances. I haven't investigated the complexity of implementing this but I imagine it is doable because the DistribcellFilter is setup to do something similar for tallies.

[kkiesling]

Additional reason for needing volume for a specific instance is because one cell could be clipped by the universe it's in, in which case simple division by num_instances is not accurate.

[xinzhouhe]

Hi, we are a pair of students from EECS 481 at the University of Michigan, we would love the opportunity to contribute to this issue. If it is still open or some work to do, can we have the opportunity to work on it? Thanks

[pshriwise]

Hi @xinzhouhe. This hasn't been implemented yet, no. Thank you for volunteering!