Radiation Tools
Tools for evaluating occupational radiation exposure.
Distance and Shielding
Inverse Square Law
Estimate how radiation intensity changes with distance from a point source.
Open the tool →Half-Value Layer Shielding
Calculate how much shielding reduces radiation intensity using half-value layers.
Open the tool →Shielding by Number of Half-Value Layers
Calculate the reduced intensity after a given number of half-value layers.
Open the tool →Shielding by Number of Tenth-Value Layers
Calculate the reduced intensity after a given number of tenth-value layers.
Open the tool →Tenth-Value Layer Shielding
Calculate how much shielding reduces radiation intensity using tenth-value layers.
Open the tool →Shield Thickness from HVL
Calculate the shield thickness needed to reach a target intensity from the half-value layer.
Open the tool →Shielding with Buildup Factor
Calculate shielded intensity using the attenuation coefficient and a buildup factor.
Open the tool →Decay
Radioactive Decay
Calculate how much activity remains after a given time from the half-life.
Open the tool →Activity from Number of Atoms
Calculate activity from the number of radioactive atoms and the half-life.
Open the tool →Effective Half-Life
Combine physical and biological half-lives into an effective half-life.
Open the tool →Dose
Gamma Dose Rate from a Point Source
Estimate gamma dose rate from source activity, gamma constant, and distance.
Open the tool →Dose Summation (TEDE)
Add external and internal dose to get the total effective dose equivalent.
Open the tool →Radiofrequency
Power Density from Electric Field
Calculate RF power density from measured electric field strength.
Open the tool →Power Density from Magnetic Field
Calculate RF power density from measured magnetic field strength.
Open the tool →Maximum Power Density at Antenna
Estimate the maximum power density at the face of an antenna.
Open the tool →RF Distance to Exposure Limit
Calculate the distance from an antenna at which power density falls to the exposure limit.
Open the tool →RF Exposure Time Above the EL
Calculate allowable exposure time when power density exceeds the exposure limit.
Open the tool →Ultraviolet
UV Permissible Exposure Time
Calculate the permissible ultraviolet exposure time from effective irradiance.
Open the tool →More tools will be added as they become available. Use results alongside professional judgment and your workplace requirements.
Built by OEMS to support practical, science-based workplace health decisions.