Single-Use Bioprocess Assemblies worked example

Gamma Dose Cost at 81% validated load density fill: a worked example in single-use bioprocess assemblies

Push validated load density fill up to 81% and the picture changes. This example computes every intermediate figure at that operating point. Used by single-use manufacturing planners to budget contract gamma irradiation for a sterilization lot of fluid-path assemblies.

The inputs for this scenario

  • Assemblies irradiated per shipment: 450 units (unchanged)
  • Gamma dose cost per assembly: 6.8 $/unit (unchanged)
  • Validated load density fill: 81 % (raised for this scenario; the documented default is 70)
  • Dosimetry and lot release fee: 2,400 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Cost = assemblies x dose cost per assembly x load density % + dosimetry & release) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,879 $ for total gamma dose cost, the number this scenario is built around.
  • At this operating point the engine returns 10.84 $ / piece for gamma dose cost per unit.
  • At this operating point the engine returns 2,479 $ for variable gamma dose cost.
  • At this operating point the engine returns 2,400 $ for fixed gamma dose cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where validated load density fill sits at 70% and the headline result is 4,542 $, this scenario comes in 7.41% above the baseline at 4,879 $.
  • It computes total gamma irradiation cost, the fixed dosimetry and release adder, the variable dose charge scaled by load density, and the resulting cost per assembly. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total gamma dose cost: 4,879 $ (headline result)
  • Gamma dose cost per unit: 10.84 $ / piece
  • Variable gamma dose cost: 2,479 $
  • Fixed gamma dose cost adder: 2,400 $

Run it with your numbers

  • Every input above is editable in the live Gamma Dose Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.