RP Assist app for iPhone and iPad

Radiation Protection (RP) Assist app is designed to help practitioners working with radiation and radioactive substances. It is suitable for use by Radiation Protection Supervisors (RPSs), Radiation Protection Officers (RPOs) and other radiological protection practitioners.

RP Assist has four main screens: Conversion, Decay, Activity Calc and Dose Rate.

The conversion screen contains six different converters to cover the most common situations where units may need to be converted. These are radioactivity, radioactivity concentrations, absorbed dose, absorbed dose rate, effective dose and effective dose rate.

The decay screen gives you the ability to decay a parent radionuclide for a user defined time period or date range. The RP Assist app contains half-life information for all 1252 radionuclides published in ICRP Publication 107. Half-life data from ICRP Publication 107 is used with permission from the International Commission on Radiological Protection (ICRP). Not only can you use this data in calculations but it is also possible to just view the half-life data for a radionuclide of interest when using the app.

The activity calc screen gives you the ability to calculate the mass of a radioactive substance when given the radioactivity quantity present. This screen also allows you to calculate the amount of radioactivity present when you know that the mass of a radioactive substance that is present. The RP Assist app contains calculated specific activity information for 1252 radionuclides based on the half-life data published in ICRP Publication 107. Half-life data from ICRP Publication 107 is used with permission from the International Commission on Radiological Protection (ICRP). Not only can you use this data in calculations but it is also possible to just view the specific activity data for a radionuclide of interest when using the app.

The dose rate screen contains three additional screens: point source, line source and disc source.

The point source calculator uses the inverse square law and allows the user to calculate radiation dose rates at different distances if the dose rate is known at a specific distance. There is also the option available to calculate the distance that a specific radiation dose rate will occur at if the radiation dose rate is known at another defined distance.

The line source calculator assumes that radioactivity is homogeneously distributed along the length of the line and depending on where the dose rate points of interest are in relation to the length of the line then it is possible to determine the radiation dose rate at another point perpendicular to the line if the dose rate is known at a similar perpendicular specific point.

The disc source calculator assumes that radioactivity is homogeneously distributed in a circular disc shape. This calculator allows the user to calculate the dose rate at a known point above the centre of the disc based on the dose rate at another known point. This calculator also allows the user to calculate the distance that a specific dose rate will occur at above the centre of a disc source if the dose rate at another specified point is known.