Radiation protection calculators

A radioactivity to dose rate to calculator by Ionactive. Choose a radionuclide and activity, and output the dose rate at a specified distance from the source (with or without shielding). Alternatively, specify a known dose rate and a desired dose rate, and output the thickness of shielding required for a given radionuclide at a desired distance. All inputs and outputs can be specified in SI and Non-SI units. The calculation process uses adaptive buildup to avoid under or over exaggerating the dose rate or shielding. As with our companion calculator (Dose Rate to Radioactivity), dose rate and shielding parameters have been validated with MicroShield and OpenMC. 

A handy Radiation Protection Units Conversion Calculator. Conversions for dose, dose rate, activity, shielding and exposure are included. SI and non-SI units are included. 

A simple and useful radioactive decay calculator with Half-Life analysis and visual plotting. Select your radioactive material of choice, choose the decay period and calculate the remaining radioactivity. Will allow reverse calculations, so you can back calculate historic radioactivity based on the activity now. These features can be extended to setting dates and then calculating decay between them.  Also calculate time taken to decay from activity A to smaller activity B. If you just want to look up a curated half-life just select the radionuclide of choice and it will be displayed below your selection. Decay calculation results are also presented as interactive plots which you can explore, zoom and save. 

Radon gas measurements in the UK are expressed as activity per unit volume (e.g. Bq per cubic metre of air). It is often useful to express this radon concentration as a dose or dose rate (micro Sv or micro Sv/h), which can then be used to present and compare radon exposure risk with something more tangible (like cosmic radiation during a flight at 40,000 feet). This calculator will do just that. 

Radiation shielding data for use with F-18 (inclusive of an interactive F-18 shielding calculator) Provides examples of lead thickness against transmission, and compares with concrete (3 densities considered) and steel. Based on broad beam conditions. Useful for shielding sanity checks during the initial design of PET shielding facilities.