Radiation Protection Tools

Internal Dosimetry Calculator

ICRP OIR 130 / 134 / 137 / 141 · Committed Effective Dose · Bioassay Back-Calculation

Direct Intake → Committed Effective Dose

Nuclide & Route

Radionuclide*

Worker / Public

Worker inhalation coefficients at 5 µm AMAD (ICRP OIR occupational default); older-series entries at 1 µm AMAD are labelled in the reference table. Use the e(g) override below for other particle sizes.

Intake Parameters

Intake*

Dose Coefficient Override

e(g) override Sv/Bq — leave blank to use ICRP table value

Results

Committed Effective Dose (CED)
—

Dose Coefficient e(g)

—

Sv/Bq

Intake (Bq)

—

Comparison to Annual Limit

Bioassay → Estimated Intake → CED

Nuclide & Sample

Radionuclide*

Bioassay Result*

Unit

Sample Volume / Collection Periodfor 24h urine

Timing

Time post-intake (t)*

Time Unit

Date of Intake

Date of Sample

Worker / Public

Retention Function m(t)

m(t) override fraction retained at time t — leave blank for default

Results

Estimated Intake (I)
—

Committed Effective Dose (CED)

—

m(t) used

—

e(g) used

—

Sv/Bq

Timing Details

Air Concentration → Intake → CED

Radionuclide*

Air Concentration*

Unit

Exposure Duration*

Duration Unit

Breathing Parameters

Breathing Rate

Custom Rate (m³/h)

Worker / Public

Protection Factor (RPF)

Results

Intake

—

Breathing Rate Used

—

m³/h

Committed Effective Dose (CED)
—

DAC Fraction

ICRP Dose Coefficient Reference — e(g) Sv/Bq

Filter nuclide

Nuclide	Route / Type	AMAD	e(g) worker (Sv/Bq)	e(g) public (Sv/Bq)	Source

⚠ Internal Use Only. Dose coefficients from the ICRP OIR series: Publications 134 (2016), 137 (2017), 141 (2019) — 130 (2015) is methodology only. "Provisional" = secondary-source cross-check pending primary-table verification; older values ICRP 68/119; public e(g) from ICRP 68/119 (EIR series pending). m(t) retention functions are simplified approximations — verify against ICRP 78 / OIR reference tables before any regulatory submission. This tool does not constitute regulatory dosimetry documentation. ALI values based on 20 mSv/yr (occupational) and 1 mSv/yr (public) per ICRP 103.