The previous examples show integrated flux over a cell, independent of energy and time. It is, however, useful to know the energy and/or time dependence of such quantities. Below are three examples related to the three previous tallies:

E4 0.01 0.1 1. 10.

T14 0.1 0.2 0.3 0.4 E24 0.1 1. 10.

T24 10. 99I 1000.

The first line defines, for tally 4, an energy binning where the upper bounds of each bin are 0.01, 0.1, 1 and 10MeV; tally 14 give the flux in cell 1 and in cell 2 as a function of time (from 0.1 to 0.4 shakes). Tally 24 will give the mean flux of cells 1 and 2 as a function of energy (three bins) and of time (101 linear bins from 10 to 1000 shakes).

• The first bin is always from 0 to the first specified upper bound.

• MCNP gives also the sum of all bins (1D binning), or for 2D binning the sum of all energy bins as a function of time and the sum of all time bins as a function of energy.[32]