Contamination & Internal internal_dose_calc
Internal Intake & Committed Dose (CEDE & ALI)
Calculates 50-year Committed Effective Dose Equivalent (CEDE) and Annual Limit on Intake (ALI) percentages for worker inhalation and ingestion intakes using ICRP 68/119 dose coefficients.
CEDE = I × e(50); ALI = 0.05 Sv / e(50)
RADCALC HEALTH PHYSICS & NUCLEAR ENGINEERING WORKSHEET
Internal Intake & Committed Dose (CEDE & ALI) (Internal Dose & ALI)
Domain: Contamination, Air Sampling & Internal Dosimetry · Tool ID:
internal_dose_calc · Engine: 100% Local Browser WASM CEDE = I × e(50); ALI = 0.05 Sv / e(50)
Operational Notes:
Guided Stepper Workflow All Input Parameters & Solver
1
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Select your target output variable. The stepper will guide you through only the required inputs.
2
Start from a Field Scenario Preset (Optional)
Pre-fill realistic health physics values, then refine individual parameters or jump straight to the result.
All Parameters Entered
Review Inputs & Calculated Result
Solved Output Live WASM Readout
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Entered Input Parameters (Tap any row to edit)
Calculated Result & Visual Analysis
Nominal Solved Value Updated automatically
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Enter parameters on the left to calculate.
CLIENT-SIDE 3D SIMULATION Internal Intake & Committed Dose (CEDE & ALI) 3D Transport Field
Interactive 3D Geometry & Particle Transport
WebGPU / WebGL2 Ready
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Checking Browser 3D Capabilities… Probing WebGPU adapter, WebGL 2.0, and WebGL 1.0 contexts locally.
Geometry & Field Diagram
Interactive Model
Sensitivity Curve
Normalized Base-Unit & WebMCP Tool Payload internal_dose_calc
1. Input & Solved Parameter Ledger
| Role | Symbol | Parameter Name | Entered / Display Value | Normalized Base Unit | Definition |
|---|
2. ICRP Internal Dosimetry & Air Sampling Record
Governing Equation & Parameters
Committed Dose (Sv) = Intake (Bq) × Dose Coefficient e(50); Fraction of ALI (%) = CEDE / 5 rem
| Symbol | Parameter | Default Unit | Definition |
|---|---|---|---|
| I | Radionuclide Intake Activity | Bq | Total activity of radioactive material entering the body via inhalation or ingestion in Becquerels. |
| e(50) | Committed Dose Coefficient | Sv/Bq | 50-year committed effective dose coefficient per unit intake in Sv/Bq (ICRP 68/119). |
| f_ALI | Annual Limit on Intake Fraction | % | Intake expressed as a percentage of the occupational 50 mSv (5 rem) annual limit. |
| CEDE_mSv | Committed Dose in mSv | mSv | 50-year Committed Effective Dose Equivalent in millisieverts. |
| CEDE_mrem | Committed Dose in mrem | mrem | 50-year Committed Effective Dose Equivalent in millirem (1 mSv = 100 mrem). |
Health Physics Notes & Related Calculators
Operational Guidance & Physics Assumptions
- The committed dose coefficient e(50) integrates organ dose over a 50-year period following acute intake per ICRP Publication 68 (workers) and Publication 119.
- Annual Limit on Intake (ALI): The intake activity that yields an annual effective dose of 0.05 Sv (5 rem): ALI = 0.05 / e(50) Bq.
- Reference worker coefficients: I-131 (Inh) = 1.1×10⁻⁸ Sv/Bq; Cs-137 (Inh) = 4.8×10⁻⁹ Sv/Bq; Co-60 Type S (Inh) = 3.1×10⁻⁸ Sv/Bq; Pu-239 Type M (Inh) = 5.0×10⁻⁵ Sv/Bq.
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