dose calculated via a Monte Carlo full physics absorbed dose in an equivalent model. This P
factor is a kernel-specific factor, and once determined, it can be used for any execution
implementing the corresponding electron kernels, provided grid spacing is consistently used.
Photons
Figure 4-1. Procedure to produce EDK based on Monte Carlo Calculations
4.3 EDK Determinations Based on The MCNP5 Monte Carlo Code
In the MCNP531 Monte Carlo code, there are three different methods by which one can
tally to yield absorbed doses to be used for integrated organ absorbed dose calculations; these are
achieved by using either a cell flux tally (F4), an energy deposited tally (F6), or a pulse height
tally (*F8), and each has a different basis for computing the absorbed radiation dosel4,31. To
illustrate this, we compare absorbed doses computed using the F4, F6 and *F8 tallies,
respectively to highlight the differences in these computations, and establish a procedure that
ensures that our electron kernels are calculated accurately, and the Monte Carlo transport and
subsequent absorbed doses determined as a benchmark are completely based on a detailed
physics treatment.