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Disclaimer: This software is for radiation protection education, screening calculations, and professional support only. It does not replace qualified health physicist judgment, regulatory requirements, approved procedures, emergency response tools, or formal shielding design review. Exposure, absorbed dose, equivalent dose, and effective dose are distinct quantities; do not equate R and Sv without explicit context and assumptions.

Internal Dose Help

Screening-only scope

Internal dose tools in HPCalc are for documentation/training support and conservative screening workflows.

They support intake × coefficient, ingestion, inhalation, DAC-hours, and ALI fraction screening summaries.

They do not perform regulatory intake evaluation, official dose assignment, or medical determination.

Tool overview

  • Intake × coefficient: committed effective dose estimate from intake and selected coefficient.
  • Ingestion: ingestion-focused screening input wrapper around the same coefficient model.
  • Inhalation: known-intake mode or air concentration × breathing rate × time mode.
  • DAC-hours: airborne concentration relative to DAC over duration.
  • ALI fraction: intake compared against ALI for route-specific screening context.

Value origin and documentation

Tabulated values come from bundled starter datasets and keep their confidence labels.

User-supplied values require source note documentation before export and should include a source type when available.

Source types: manual-lookup, procedure, dosimetry-review, vendor, conservative-assumption, other.

Confidence labels

Coefficient and limit selections carry the same confidence vocabulary as elsewhere in HPCalc (validated, reference-derived, illustrative, user-supplied, placeholder).

Illustrative and placeholder starter data are for training and workflow demos—do not treat them as facility-approved coefficients without independent verification.

Tab hash routes

Use URL fragments to open a specific internal-dose tool (the intake × coefficient tab maps to #intake):

  • #intake
  • #ingestion
  • #inhalation
  • #dac-hours
  • #ali-fraction

What internal dose screening does not do

  • No certified internal dosimetry.
  • No bioassay interpretation.
  • No organ dose modeling.
  • No full biokinetic modeling.
  • No medical evaluation logic.
  • No regulatory dose assignment decisions.

Qualified review required

Use these outputs for screening/documentation support only. Actual intake assessment and dose assignment require qualified internal dosimetry review.
Open internal dose calculator