We have checked the range of ages for overlapping organs and other geometry errors using the Sabrina graphics code. No errors have been seen following our debugging. The sharing of common surfaces by various organs permits the model to adjust to different sizes without introducing errors. We have also performed geometry checks with a wide variety of organ combinations. These volumes are used by MCNP for tally normalization.
Many cells are too complicated to permit analytic volume calculations.
An approximate model is used instead of the 4th order thyroid description. The other affected organs are the 6 and 9 month pregnant urinary bladders. These bladders are omitted at present.