How to know the amount of each energy type in heating

Hi everyone! I have an MSR of 150MWth, how do I know the energy type in the fuel heating and how many are they? I use the materialfilter and the particlefilter to get a result, when the filter is neutron, the energy is 131.84MW in fuel, and 2.89MW in graphite, can I understand the 131.84MW is the sum of neutron and fission fragment? and I got 4.26MW in fuel and 10.1MW in graphite when particlefilter is electron. Is the 10WM energy in graphite the energy of beta rays transported by fuel, or the energy of secondary electrons in graphite?I was very confused. I am looking forward to your answer!