Neutron flux spectrum

Hi all, i tried to follow the example notebook of neutron flux spectrum with 500 energy group. I obtained the same thing as what is given in the notebook. I used a normalization factor of (6.18e+12) for the normalized flux.

I tried to compare two different spectrum (one is at zero burnup & another one is at 30MWd/KgHM burnup) but i’m getting the exact same plot. So, they overlap each other. But if i’m not wrong then they shouldn’t be exactly same. What did i do wrong here?

IMG_20220205_161449

I already solved this problem.there was something wrong with the tally.

I found the same problem. Where in the tallies might need to be changed?